Back to the Future

Corrected entry: White screens used for lighting are reflected on Marty's sun glasses, when he is boosted backwards by the amp.


Sacha Premium member

Correction: Watching the scene frame by frame on BluRay, you can see reflected in Marty's sunglasses that there are 2 bright windows. They are not white screens because you can see the window panes in his glasses. The same windows with panes are seen right after he answers Doc's phone call to Marty (the windows in the background that were right in front of Marty).

Corrected entry: After Marty returns to the present, he wakes up in his room that is identical to the beginning of the movie, however the rest of the house i.e the living has changed and is more modern.

Waldo Gonzalez

Correction: That merely tells us that Marty was more or less the same in both timelines, having similar tastes.

Which wouldn't happen. Because with loving, successful and self confident parents, there's no way a kid turns up just the same as with goofy, drunk, and pushovers parents.


Corrected entry: When Biff takes Marty out of the car in 1955, he says, "You caused $300 damage to my car, Mcfly!" The only person who knew he was a Mcfly was Doc Brown.


Correction: The line Biff says is "You caused $300 damage to my car you son of a bitch", he never addresses him as McFly. The TV-edited version might have changed the line, but that's not a movie mistake.

ctown28 Premium member

Corrected entry: Marty's sister stated at the dinner table that grandma hit his dad with the car, but in the 1955 scene it was the grandfather that hit him.

Correction: She says Grandpa, not Grandma.

Thomas Norris

Corrected entry: Plutonium is not a red liquid, it is a white-silver coloured metal. Even oxidised in solution it would be paler than shown.

Correction: It wouldn't be safe to use plutonium metal. Even with the suits on, both Marty and Doc would be subject to lethally high amounts of beta and gamma radiation. Chances are they used a dilute solution (possibly plutonium (IV) chloride as that is red in colour) and it is possible to deeper red is down to dye or impurities in the solution - the latter is possible as Doc acquired it from terrorists.

Andy Benham 6979

Corrected entry: When Marty escapes the Libyans at the Twin Pines Mall, hits 88mph and ends up in Old Man Peabody's barn, driving in through a large opening in the barn before crashing. However, the cut to the inside of the barn shows no form of entry other than the closed doors the family are entering. In addition the inside of the barn is very small compared to the outside view.

00:30:10 - 00:31:55

Paul Andrews

Correction: He doesn't enter the barn where the family enters the barn. He enters through the back of the barn and goes all the way through, hence why the family are facing the lights from the door they enter through, not the back of the car.

Corrected entry: In the speaker explosion scene at the beginning of the film, a horizontal safety line can be seen attached to the waist of the stunt person as he is knocked backwards.

Correction: This is the guitar cable which connects Marty's guitar to the amplifier.

Corrected entry: Steven Spielberg makes a cameo as the jeep driver with a green cap who pulls Marty around the street.


Correction: That is not true. The jeep driver is Walter Scott (who is also credited for his role).


Corrected entry: Einstein, Dr. Emmett's dog is the first to travel in the time machine. He travels one minute into the future during which he ceased to exist in the current time only to reappear one minute later. According to this it hence would be impossible for the Doc, Marty and his girlfriend, Jennifer, to travel into the future and see their futures as they would have ceased to exist as of when they left the current time until they reappear in the time they set hence impossible to have continued their normal course of life and exist in the future.

Correction: The series makes it clear that the timeline is highly resistant to changes, and that when you make a change to the timeline, there's a delay before those changes impact the timeline. This is why Marty saw the photo of him and his siblings slowly fading rather than instantly disappearing as soon as he interrupted his parents' getting together. In the second movie, Jennifer and Marty weren't in the future for long enough to start impacting the timeline.

Corrected entry: When Marty is trying to prove his futureness to Doc, he says that his sister was in the class of 1984 and then shows Doc a picture. Whenever the picture is shown however, the shirt says class of '81.

Correction: There's a vertical fold in her sweatshirt causing the '4' to be compressed so it looks like a '1' if you don't look too closely.

Corrected entry: When Lorraine follows Marty back to Doc's in 1955 and Doc goes to answer the door, he says to Marty (before opening it) that it's his mum. Lorraine must have heard them through the door yet she never questions it.

Heather Benton Premium member

Correction: Two possible reasons she never asks about it. First, she simply did not hear him. You're assuming she did, but there's no evidence of it. Second, asking questions would be tantamount to admitting to eavesdropping. It's rude to eavesdrop and so Lorraine would hardly give herself away by asking questions about something she wasn't supposed to have heard in the first place, and which would have sounded nonsensical anyway.

Phixius Premium member

Corrected entry: The original DeLorean tops out at a measly 80 miles per hour and that is probably with a tail-wind downhill. However, it is likely the Doc heavily modified the engine to reach 88 miles per hour.

Correction: The DeLorean DMC-12 had a listed top speed of 130 MPH, and Road & Track tested the 0-100 MPH acceleration time. While it's performance figures were criticized as being somewhat disappointing, the DMC-12 could easily reach 88 MPH even without any modifications Doc would've done.

Corrected entry: This one is tricky but important in view of Doc's concern about doing anything that will alter the future. The lightning rod on the clock tower would have been connected to ground with a thick cable. Doc would have had to disconnect this cable to allow the current from the lightning to flow into his cable instead and hence to the time machine. We now know that a lightning strike is a result of a complex interaction of electric potentials between charges in a cloud and charges in the ground below. By disconnecting this grounding cable this interaction would have been disrupted, causing the lightning to strike at a different time or strike a different object on the ground.

Correction: If you touch a lightning rod while lightning strikes it, you will still get electrocuted. So, just like the energy would travel into your body, it traveled through Doc's cable. No need to disconnect the ground. If grounding a power source kept it from charging any thing else, no electrical appliance would ever function.

Phixius Premium member

Corrected entry: Early in the film, Mr. Strickland tells Marty that he is a slacker and that he reminds him of his father because he was a slacker too. However, it is extremely unlikely that Mr. Stickland should even remember who George McFly is. How many school administrators can remember some random student from 30 years prior? It would make more sense if he was George's teacher because teachers can have a close relationship with their students, but as a school administrator, there have literally been tens of thousands of students under his watch during his 30 year tenure at Hill Valley High School. It's not as if George ever did anything to stand out. He was not a star athlete or a valedictorian and never did anything noteworthy in his life in the original timeline. He was not a troublemaker either, so it's not as if he would have spent a lot of time in Strickland's office. He should have been a nameless face in the crowd as far as Strickland was concerned, so hard to believe he would still remember such a random person after 30 years. I have only been out of high school for 13 years myself and if I ran into my old principal in the street tomorrow, I can guarantee that he wouldn't be able to remember me to save his life.


Correction: George did do something to stand out. He did nothing! Strickland hates slackers and clearly remembers them. One of my guidance counselors in jr. high was my father's guidance counselor and knew exactly who my father was based on my last name alone 21 years later. Some people just have very good memories for names and faces.

Grumpy Scot

Corrected entry: When Marty begins playing "Johnny B. Goode", the guitar tone is suddenly distorted whereas it was clean in the prior song without him ever adjusting the amp or the guitar's volume knob. The guitar also becomes more distorted during the guitar solo.

Phaneron Premium member

Correction: Turning a knob on a guitar takes almost no time at all. He could have easily turned it between shots, or when his back was turned toward the camera.


Corrected entry: In the original film Doc rips up Marty's letter and then sellotapes it back together at some point, however at the end of the second film Doc faints, so he wouldn't have picked up the letter and should be dead.

Correction: Doc never picks up the letter because he never let it go in the first place. He rips it up and *puts it in his pocket*. Presumably the pieces are still in the pocket when he faints and subsequently wakes up in his home.

JC Fernandez

Corrected entry: When Marty travels back to 1955 the DeLorean first strikes a scarecrow, then drives at high speed into a barn and finally crashes through the barn door to escape. Later, when it returns to 1985, it crashes into a movie theatre front before it can stop. After all this mayhem the DeLorean doesn't have as much as a scratch on its nose.

Correction: That's because the entire body of every DMC DeLorean is made out of stainless steel, not fiberglass.

Phixius Premium member

Corrected entry: Mayor Red Thomas in the 1950s based on his picture, looks to be around age 50. However, in 1985, when he is a bum, he still looks about the same age, even though he should be around 80 years old now. Granted, some people age better than others, but it is doubtful that an old man living on the streets would even survive for very long, let alone age gracefully.


Correction: You are assuming Red has lived on the streets for a long time. We have absolutely no information about how long he has been a bum; he could just as well be a youngish-looking 80-year-old who just recently suffered a decline in fortune and became homeless as a result.


Corrected entry: After Marty changes things and returns to 1985, he finds his brother Dave is more successful and now has an office job. So why is Dave still living at home with his parents?


Correction: This has already been asked. He never says he lives there. He may be just having breakfast with his sister and parents on his way to the office. Also, if he's living with his parents, it wouldn't be a mistake. Many young adults continue to live with their parents, just because they don't have to spend extra money.

Corrected entry: When Marty first enters Lou's cafe in 1955, Lou is visibly angry at Marty just because he won't order something right away. However, he doesn't seem to care that one of his paying customers, George McFly, is being harassed by Biff and his gang and told never to come in there again. You would think Lou would tell Biff and Co. to knock it off or else be asked to leave.


Correction: George had already paid for his cereal, what does Lou care? Biff and Co. are paying customers on occasion too, he wouldn't want to alienate them either. Especially considering they're likely to vandalize his restaraunt in retaliation.

Phixius Premium member

Corrected entry: Lorraine thinks Marty's name is Calvin Klein because she said it was written on his underwear. Actually, it's stitched on, which should tip her off that the underwear was made that way when it was manufactured, not written on.


Correction: Ever heard of embroidery? It's the process of using a needle and thread to put images or letters on cloth by hand. Lorraine undoubtedly assumed "Calvin's" mother had embroidered his underwear.

Phixius Premium member

Corrected entry: After Marty returns to 1985, he discovers that he now has the new Toyota truck he wanted, while the rest of his family is forced to share one car. Why would Marty, the youngest of the siblings, who is still in high school, have his own brand new truck while his older siblings and both parents have to share one other vehicle?


Correction: We only see one vehicle other than the truck, this does not mean it is the only other vehicle. We only know that Marty's older brother uses the car to go to work.

Phixius Premium member

Corrected entry: Marty gives Goldie Wilson the idea to run for mayor before Goldie thought of it himself. Suppose now that Goldie runs for mayor before he is supposed to and loses the election and it ends his political career, thereby disrupting history.


Correction: So what? Marty changes lots of things during his time in the past, ranging from the very minor - Twin Pines Mall becoming Lone Pine Mall - to the really quite major - his parents' entire personalities and futures. History's already disrupted to a significant degree, one more thing, particularly one that, as far as we know, didn't happen, is hardly mistake-worthy.

Tailkinker Premium member

Corrected entry: The lightning bolt hitting the clock tower should not have stopped the clock because the clock is not electrical, it's mechanical.


Correction: Electricity arcing between metal parts can melt them.

Grumpy Scot

Corrected entry: When Marty is hit by Lorraine's dad, it is right in front of the Baines house. If he was right in front of his house, then why was he driving so fast? He should have been slowing down to pull into the driveway or park, but he appears to still be going at a pretty good speed.


Correction: There's any number of reasons. Maybe he's just a reckless driver, maybe he was headed to the store after work to pick something up and his house happened to be between the store and his job. Just because you don't know why something happened does not make it a mistake.

Phixius Premium member

Corrected entry: After Marty reunites his parents, he and his siblings all reappear in the photo and all is well. However, in order for Marty and his brother and sister to exist again, it would mean that Marty's parents would have to have sex at the exact same moment all three times to conceive them. Even if they were a few seconds off, it wouldn't be the exact same three kids. Similar maybe, but not exact. Now that George is more successful, he will be doing many things differently in his life so the chances of him and Lorraine having sex at the exact same millisecond all three times to have those exact three kids is beyond astronomical.


Correction: This is purely speculative. There is no way anyone (other than the filmmakers) can say what "should" have happened in the altered timeline. The odds may be astronomical, but the odds are certainly better than the odds of a plutonium-powered, time-travelling Delorean being invented.

JC Fernandez

Corrected entry: When Marty is trying to prove to Doc that he is from the future, he shows him his driver's license and the photo of himself and his siblings. Doc immediately dismisses them both. Doesn't Doc notice that the quality of the color in the photos is much better than any color film that existed in the 1950's? Wouldn't that grab his attention?


Correction: If he actually took the time to examine it, maybe. Think about it, if someone walked up and told you he was from the future and showed you a document to prove it, would you believe him and examine it or humor the weirdo and get away as quick as you could?

Grumpy Scot

Corrected entry: When older Lorraine is talking about when she first met Marty's dad, the words VODKA on the vodka bottle are reversed therefore the shot was flipped.


Correction: "VODKA" (at the bottom of the label) is not spelled backwards. I think you're confusing it with the brand of vodka, POPOV. Only the last few letters are visible in the shot. ("-OV").

JC Fernandez

Corrected entry: When Doc is having the DeLorean do the burn out to get the car up to speed, the car is spinning its wheels up to 65 mph and Doc releases the brake. Now the car takes off, but the car would lose most of the speed the tires had built up as it is starting from essentially a dead stop even though the speedometer still shows 65 mph. Think of it this way, the back tires may be moving at 65 mph but the front tires are not. There is no physically possible way for a car to jump from 0 to 65 mph instantaneously using only its tires no matter how fast they were rotating. Even an F/A-18 needs a catapult to get that kind of speed so quickly.


StopNGo & Girls

Correction: If the speedometer was hooked up in such a way as to show 65MPH as the speed before the brake was released, it would still show it afterward. The car was never going 65, true, but the tires were telling the speedometer it was. For whatever reason this is how Doc wired it all together. The tires wouldn't slow down suddenly just because the brake was let up, they'd continue to skid until the car's speed matched their own.

Phixius Premium member

Corrected entry: When Loraine tries to kiss Marty in the car and he pulls away, she asks if something is wrong, but instead of calling him "Calvin" (as in Calvin Klein) she calls him "Marty."

Correction: When Marty first met her, and she thought his name was Calvin Klein, he told her his friends called him Marty. She referred to him as Calvin and then Marty in the scene in Doc's garage, and she calls him Marty in their last scene before he goes back to 1985. Clearly she's getting used to calling him Marty.


Corrected entry: If everything that happens in the past, determines what happens in the future,and there in between, then wouldn't it make more sense for the picture of the family, when it starts to come back, to have them dressed differently? Such is the case when they are in the new family scene, when they come back.

Correction: This is a question, not a mistake. There's no reason why they couldn't be wearing the same clothes in the altered timeline.

Tailkinker Premium member

Corrected entry: When Marty is plugging his guitar in to the mega amp, the amplifier end of the cable is stereo (like you would use for headphones) and the guitar end is the correct mono connector.


Correction: This is obviously something Doc Brown built himself, not an "off-the-shelf" item. For whatever reason he wanted, needed, or settled on a stereo connection in the amp.

Phixius Premium member

Corrected entry: The camera that Doc Brown used was a JVC GR-C1, (produced in March 1984) (Also, this particular camcorder was the first built in camera also to feature a tape deck built in).


Correction: A perfectly legitimate camera for someone to have in the year 1985.


Corrected entry: When Doc is on the clock tower attempting to reconnect the cable, he pulls it and disconnects the other end (indicating the cable has just enough slack to touch the ground from point A and then be inches short of point B). Doc then connects the cable and then ties the cable around the clock hands. The other end of the cable is only held by a fallen branch, if he were to really propel down the cable, he would have gone completely vertical down. When he lands, the cable would have been shorter due to him tying it to the clock hands. Also a shock of 1.21 gigawatts would have landed him in the hospital if not the funeral home.

Correction: Several "mistakes" in one entry, that alone should have gotten this entry rejected. The cable is more than long enough in a more or less straight shot from one end to the other. The branch is keeping from being a straight shot. That's why, even though it's wrapped arond the clock hand, it's still long enough after Doc disentangles it form the branch. If all of Doc's weight, and whatever more leverage he gained by pulling against the clock hand, wasn't enough to move the branch, him rapelling down the cable wouldn't have moved it either. It was stuck in place. The jolt he got wasn't a full 1.21 gigawatts either. The cable was surely insulated and he was wearing gloves, also certainly insulated, if I remember that small bit correctly.

Phixius Premium member

Corrected entry: When Marty shows Doc the flyer from 1985 about saving the clock tower, this gives them the time that the clock will be struck by lightning, 10:04pm on that coming Saturday (11/12/55). However, the main problem here is that the time is only given in hours and minutes, and since lightning moves at the speed of light, an entire lightning strike lasts only fractions of a second. Doc and Marty have no clue as to what second the lightning will strike during that minute, and it isn't given a thought. In reality this would cause a tremendous dilemma if the Delorean had to pass at a precise second. And since the clock on the tower lacked a second hand, they would need a sychronized watch to determine the second the strike occurs, even if they knew it. In the movie it is assumed the strike occurs at 10:04:00, which is fine, but for more realism they could've added a second hand to the clock to eliminate this plot hole. It would have been stuck in place as the other hands after the lightning strike.


Correction: A second-hand isn't necessary. The second within the minute that the lightning strike occured could have been been determined by an examination of the inner workings of the clock (which stopped functioning after the strike). Such a noteworthy piece of trivia would likely have been included in the Hill Valley Preservation Society's flier. In fact, Doc states as much - that according to the flier the clock is struck at precisely 10:04pm.

JC Fernandez

Corrected entry: "Back to the Future" was originally going to be called "Space Zombies from Pluto."


Correction: Untrue. There was an MCA entertainment exec, noted for his often odd studio notes, who suggested (during post-production) that this should be the title of the film (as this is the title of the comic young Peabody shows to his folks when Marty arrives in 1955). But it was never given serious consideration and was certainly never a used title.

JC Fernandez

Corrected entry: In the beginning of the movie. From when Doc is shot by the terrorists to when Marty drives away to 1955, a few times the area where Marty is standing at the end of the movie (when he watches the scene again) is visible, yet "Marty" isn't standing there.

Correction: Marty has changed history in subtle (name of the mall changes) and not-so-subtle (hip parents; Doc survives) ways. The scenario may simply have played out a little differently this time around.

JC Fernandez

Corrected entry: The first time Doc is shot by the terrorists, his gun (which he threw) is visible near the front of the terrorists' van. However, when the scene is shown again at the end of the movie, the gun is nowhere to be seen.

Correction: That doesn't mean anything. The first part was from before Marty changed the past, while the second part is from after his meddling with history. Any of a number of things could have changed. Doc may have very easily acted differently having know what was to happen. If you can find an example of this using conflicting shots that are both before or both after Marty's trip to the past, then you'd have a valid mistake.

Garlonuss Premium member

Corrected entry: The license plate of the time machine is spinning on the road in the middle of the fire tracks - further down the track than where Doc and Marty stand. But the car (and therefore the license plate) was never there. It had already 'jumped'. Otherwise the license plate had to pass through Marty.

Jacob La Cour

Correction: Having just watched the scene in question, I can confirm that that is incorrect. It may be confusing because they turn their bodies to look at where the car would have been. They then turn back forward to the last place that they saw the car which is what Marty was then focusing on. After it shows the plate spinning, the next shot shows Marty and Doc facing the camera, and also the plate.


Corrected entry: At the end of the movie when Marty's alarm goes off, it is 10:27 am. His brother and sister are at the dining room table eating breakfast. They are both dressed in business attire. It doesn't make sense that two business persons would be eating breakfast at home at 10:30am.

Correction: It's also Saturday. Dave may have had a weekend business meeting, so it wouldn't have required him to come in at his regular time.

JC Fernandez

Corrected entry: At the very end, Marty tells Doc that he'll have to back up as they don't have enough roads to get up to 88mph. The next shot we see shows the avenue stretching off at least a mile into the distance, with plenty of road to reach that speed. Since the DeLorean was able to achieve 88mph in a parking lot, it should be fairly obvious to Marty that there is no issue with them not having enough road.

Correction: He's talking about road without intersections. It'd be less than desirable to ram into the side of someone's car at 87 miles per hour.

Phixius Premium member

Corrected entry: When Marty pulls out of the barn and runs over the pine tree, it's pitch black outside (the sun hasn't risen yet). The subsequent shot shows Marty driving his car and telling himself it's just a it's complete daylight. Is the Twin Pines Mall/Twin Pines Ranch so far away from Hill Valley that it takes a sunrise's-worth of time to DRIVE from one to the other? Doubtful, since it only took Marty about 15 minutes to skateboard there from his house (and pick up Doc's camcorder along the way).

Matty Blast

Correction: He wouldn't show up at the exact time he left 1985, he would show up at the time set on the consule which I belive was 5:30am. Also, it gets pretty bright in the morning even before the sun rises. If you look the sky has a grayish look to it that looks like a overcast day before the sun rises.

Corrected entry: When Marty shows the video to the 1955 Doc, the 1985 Doc on the video states their location as the "Twin Pines Mall". Since Marty already knocked down one of the pines, the mall should've already been renamed to "Lone Pine Mall" on the video.

Correction: The timestream in the Back To The Future series is demonstrated as being somewhat resistant to changes; when Marty interferes with his parents' first meeting, he doesn't start to fade out for about a week after that happens. When Marty shows Doc the video, not enough time has passed for the effects of the timeline change to appear on the tape.

Tailkinker Premium member

Corrected entry: When Doc is on the clock tower in 1955 during the storm, a closeup of his feet is shown. He is wearing shoes with velcro straps in this shot. Velcro did not yet exist in 1955, and Doc had not yet traveled into the future.

Correction: The concept behind Velcro was conceived in 1941, the idea was submitted for a patent in 1951, and the patent was granted in 1955. Not impossible that Dr. Emmett Brown, a member of a wealthy family and fellow inventor, could acquire some.

Phixius Premium member

Corrected entry: Towards the end of the movie when Marty is driving down the street in 1955 to go back to 1985, Doc is trying to get the electricity cables back together for the lightning needed to send Marty back to the future. Doc then slides down the cable to connect the cable to the other one over the street. As he's about to connect the cable, the lightning strikes. He then has at least half a second to connect the cable and he does. But the lightning takes at least two seconds to get from the tower to the car. This is way to slow for electricity. Electricity can move around the world four times in a second.


Correction: The velocity of electric current depends very much on the insulation of the wiring being used. For instance, in open air (such as lightning) electricity is very fast, but within rubber-insulated wiring, it is slower.

JC Fernandez

Corrected entry: When Marty goes back to Nov. 5, 1955, the time is set for 8:30 AM. When he arrives he walks around a bit in amazement and then heads towards Hill Valley. The sign he passes says "Hill Valley 2 miles." When he gets there, look at the clock tower, the time is about 8:30 (give or take). He couldn't have run the two miles in under a minute even without hiding the DeLorean.

Correction: No such thing occurs. When he's being chased by the Libyans at the mall, the display reads the destination time at sometime during the 6 o'clock hour (the minutes are not visible). This is the last time we can see the precise time on the time circuit display until the night of the storm. Regardless, in the scene in question, the time circuits are out of power and malfunctioning so they could have given a false reading.

JC Fernandez

Corrected entry: In the beginning, when Doc awakens Marty in the beginning he tells him to meet him at "Lone Pine Mall" (the altered name of the mall after the movie) but when Marty arrives at the mall the sign still reads "Twin Pines Mall". How come Doc is referencing the new name that hasn't changed yet? And this scene occurred just before any time traveling took place so it's definitely not a paradox (most likely a script error).

Correction: I think you need to check again. First of all, Doc does not "awaken" Marty. Marty is visiting Doc's house, and has been trying out the gigantic loudspeaker (knocking himself backwards). Second, Doc clearly says "Twin Pines Mall", and has done so in every version of the movie I have ever seen.


Corrected entry: Just after the Libyans arrive, Marty is seen jumping into the Delorean. If you look closely at his face in this shot, you can see that it's not Michael J. Fox. It's actually Eric Stolz, who was originally cast as Marty McFly.

Movie_Freak 1

Correction: This has already been corrected once. When Michael J Fox took over the role, the costume was changed. Stoltz's Marty wore black Converse shoes in 1985 (as seen in behind the scenes photos), but when Fox took over the role, the character's shoes were changed to white Nikes. The person leaping into the Delorean wears white Nikes - it is definitely NOT Eric Stoltz.

Corrected entry: American police may be so lackadaisical that they don't attend the scene of a car racing noisily around a car park, followed by a loud crash of a van hitting a shed, but I find it hard to believe that they don't investigate continuous machine gun fire from the same area. There are occupied building all around the car park, and there is plenty of time for them to turn up.

Correction: They'd have to receive a call from someone to be made aware of the situation. If the neighbors thought it was just some teenagers screwing around with firecrackers, which is more likely (because how often to Libyan terrorists open fire right next door?), the police wouldn't exactly rush to the scene lights blazing and sirens blaring. There's very few minutes from when the Libyans start firing to when Marty goes back to 1955, and who knows how far away the nearest police cruiser is.

Phixius Premium member

Corrected entry: When Marty is being chased by the terrorists, he disappears through time, and the terrorists crash their van into the photo-booth, which presumably stops them dead in their tracks. But really, how would trashing that small booth make the bad guys irrelevant from that point onward? They weren't killed. So realistically they'd all get out of their crashed van and proceed to wreak more havoc. Yet in the time it takes Marty & Doc Brown to gather up all their stuff and drive away in Doc's van, the terrorists don't lift a finger to chastise them or confiscate the remaining plutonium.

Correction: There are any number of explanations: 1. The Libyans may have been rendered unconscious in the crash, which while not explosive *did* knock the vehicle to its side and at least one Libyan was unrestrained. 2. The parking lot was the site of machine gun fire and multiple explosions, and the Libyans may have fled the scene before the police arrived.

JC Fernandez

Corrected entry: When back in 1985 Marty's mom asks if this is the night for the big date, Marty answers "How can I go to the lake when the car is wrecked?" His family reacts by going out and checking George's BMW. Seconds later we see that Marty has his own truck - shouldn't they have been checking on that instead? And if it's because he talks about the car (i.e. the BMW) instead of the truck, they should have wondered why he was going to take his fathers BMW up to the lake instead of his truck.

Jacob La Cour

Correction: They're probably used to hearing Marty refer to the truck as "the truck," whereas George's car is "the car." Once they heard Marty say the car was wrecked, they didn't have time to think logically and conclude, well, the car may be wrecked but you're taking the truck. More likely they were startled and wanted to go check on the car right away to find out what Marty was talking about.

K.C. Sierra

Corrected entry: Even with Marty's brief instructions, it is near impossible that each backing band member (each, and as a whole) could have pulled off a near perfect rendition of Johnny B. Goode, not ever having rehearsed, known or heard the song, etc.

Correction: 1. It is NOT a perfect rendition. 2. "Near impossible" is not impossible. 3. This posting renders every musical ever made impossible.

Corrected entry: In the parking lot when Marty begins to film, Doc says the date and exact time according to his watch. Marty then looks at his watch. Apparently his is off because he shakes his wrist and puts the watch to his ear to see if it is still working. However, he is wearing a digital watch which wouldn't tick or likely have broken parts to rattle.

Correction: Character mistake not a movie mistake. I often look at my wrist when asked the time even though I do not wear a watch.

Mad Ade

Corrected entry: In 1985, when Marty's mum is talking about Jennifer, she mentions that she's never sat in a parked car with a boy before. But as Marty and his mum are sitting in a car in 1955, she says, "It's not like I've never parked with a boy before", which means she has.

Correction: Lorraine was obviously lying in 1985 about never being in a parked car with a boy, the same way a parent might lie to their kids about when they lost their virginity if they lost it in high school in hopes of deterring their kids from going out and having sex early themselves.


Corrected entry: In 1985 When Doc is recording himself as he sees the terrorists come with their trucks. Marty is supposed to say, "who, who found you?", or something like that. But as Doc is watching the tape in 1955, Marty never says anything.

Correction: Doc stops and rewinds the tape before Marty says anything.

Corrected entry: During the first Lou's cafe scene in 1955, Marty asks for a Tab, then a Pepsi-Free, then "something without any sugar in it." Pepsi-Free was "free" of caffeine, not sugar (Diet Pepsi was "free" of sugar). Marty knows this because he is seen with both Diet Pepsi and Diet Pepsi-Free in 1985. Of course, had Marty asked for Diet Pepsi in 1955, Lou would not have been able to say "Hey, you want a Pepsi, pal, you're gonna pay for it."


Correction: Marty simply changed his order. He was just naming his preferred drinks, not necessarily the ones that don't have sugar.

Jason Hoffman

Corrected entry: In the scene in the beginning at the mall when Marty is being chased by the Libyans, the tripmeter on the Delorean goes from about 17 miles to 87 miles in a matter of seconds.

Correction: The inconsistency of the trip counter has already been submitted.


Corrected entry: When the wrecked car is being backed into the driveway, it is after dark. But when Marty walks into the house and hears Biff complaining about the blind spot, look out the back glass doors. It's daytime back there.

Correction: It is not after dark. It is just getting dark, it is still light outside like a summer evening between 9 and 10pm. Same as in the background when Biff is complaining.


Corrected entry: Near the end when Biff is waxing the BMW, it is close to the garage door. But when the family goes back inside less than a minute elapses and suddenly Biff brings in the book shipment and then gives Marty the keys to the truck. When Marty goes out the front door, the BMW has now suddenly moved to the far side of the driveway. There wasn't time for Biff to finish waxing, accept the book shipment, and move the BMW in less than a minute.

Correction: It is never stated that Biff finished waxing the BMW. As for the movement of the car, if he was moving it when the delivery person arrived, all he had to do was get out of the now-moved car, sign a form, and bring in the box. You could do this in a minute.


Corrected entry: Seeing as Marty changed his future, shouldn't the photo of himself, his brother and sister be different?

Correction: Not really. The events of that day, leading up to the picture being taken, could have been the same.


Corrected entry: The rods of plutonium are transparent red, whereas real plutonium is a silvery metal.

Correction: More than likely they would have used a dilute plutonium compound (According to Wikipedia the red colour suggests Plutonium (IV) chloride, rather than pure plutonium metal, which is highly dangerous to handle outside controlled conditions, as it emits enough gamma radiation that would kill Marty and Doc within seconds.

Andy Benham Premium member

Corrected entry: When Marty is recovering from being hit by the car, his mom continually refers to him as Calvin. When Marty asks why, she responds "Well thats your name isn't it? Calvin Klein. It's written all over your underwear." But when Marty puts his pants on, we see his purple underwear and there is nothing written on them.

Gavin Jackson

Correction: The writing is on the waistband of the underwear which is covered by Marty's shirt. If you watch in slow-mo Marty lifts part of his shirt for a split second and you can see something written on them.

Mister Ed

Corrected entry: Following the mistake about the menu design in the cafeteria, look at the background. The sun has moved a lot. Look trough the window and you'll notice the shadows were a second before was sunny.


Correction: The shadows can easily be explained by passing clouds.

Corrected entry: When Marty is driving the time machine trying to escape the Libyans, he shifts gears to get up to the speed he wants. Yet when Doc puts Einstein in the time machine he never shifts gears at all and he power brakes, which can only be done with an automatic, there isn't even a device on the remote control to shift.

Correction: You can power shift with a standard transmission, it's just not as easy since you need to heel and toe the accelerator and/or clutch. Most Deloreans were manual transmissions. We don't know how Doc built the remote control, so we don't know if he built into it a means of shifting to a preset pattern, or if he had something like a pushbutton to shift the car that we don't see on the remote control.

Corrected entry: When Doc shows both his watch and Einstein's watch, the time is 1:19 a.m. From that time, to the time Einstein goes into the future which is 1:20 a.m, is really 1 minute 45 seconds.


Correction: This is not inconsistent. If Einstein left at, say, 1:19:10, and arrives back at 1:20:55, this would be a minute and forty-five seconds, and the watches would be consistent.

Corrected entry: In the opening scene where Marty plugs his guitar into the gigantic amplifier, there is no feedback - if he was standing that close, at that volume, with that amount of overdrive, there would be some ridiculously loud feedback almost instantaneously. The pickups on an electric guitar will feedback the output from a speaker just as easily as a microphone does.

Correction: Given that Doc has just invented a time machine, the idea that he could invent an amp that doesn't suffer from feedback isn't so far fetched.


Corrected entry: When Doc and Marty go to Hill Valley High School in 1955 (to look for his parents), the bell rings and everyone in the corridors leaves and goes into several classrooms. About 2 or 3 minutes later, when Marty and Doc are discussing how to get his parents together, the bell rings again and everyone in the classrooms comes back out to the corridors. It can't be because of registration because when Doc and Marty arrive, the bell is heard ringing and people are in the corridors suggesting that either registration or a lesson had just finished.

Correction: Some schools have "homeroom" which is only about 4 or 5 minutes long.

shortdanzr Premium member

Corrected entry: The morning after Marty has returned from 1955, there's a shot of Biff waxing George's car. Behind Biff we see his "Biff's Auto" yellow truck, however when Marty goes to the garage to see his new pickup truck, Biff's yellow truck has suddenly disappeared. He couldn't have suddenly left - he'd just been given a severe talking-to about not doing the second coat of wax yet.

Correction: We know Biff didn't leave because he brought in the box of George McFly's book "A Match Made In Space", but it is possible that Biff could've moved the truck out of the driveway. After being giving a talking to about not doing a second coat of wax he probably doesn't want to block up his employer's driveway.

Corrected entry: After the Libyans have shot Doc Brown, Marty screams "Bastarddddddd." When we cut to Marty after he has said it, his lips aren't moving, yet the "rddddd..." can still be heard.

Correction: It only continues for a fraction of a second after, and that can be attributed to echo.

Corrected entry: In the very beginning of the film there is a clock with a cat on it. This is the same clock used in "Honey, I Shrunk The Kids," which is another Robert Zemeckis film.

Correction: Robert Zemeckis has no connection with "Honey, I shrunk the Kids" at all.

Corrected entry: How does Doc know that lightning will hit the clock tower at precisely 10:04:00? Since the minute hand only advances once a minute, it's possible that the clock was struck anytime between 10:04:00 and 10:04:59.


Correction: Actually the gears inside the clock tower would tell you how many seconds had passed, so assuming that the story about the clock tower was researched correctly they would be certain that the bolt hit at 10:04 precisely.


Corrected entry: On the DVD version, in the scene where Doc gets shot and then later reveals to Marty that he was wearing a bullet proof vest. A vest does not work in the way shown in the movie. It doesn't repel bullets (as shown in the "impact points" in the vest he displays), it absorbs them. Read how a vest works from howstuffworks dot com and you'll see what I mean. In addition, it looks like he is wearing only a Threat Level 2a class vest. An AK47 or similar weapon with a 7.62mm round would go clean through the vest, through Doc, and out the other side thus killing him and ending the story. The only style of vest that can withstand that sort of impact is a Threat Level 3 class vest (the style that specialized units in the military wear). This style is very bulky and is extremely difficult to conceal like Doc did. In addition, it has a ceramic plate in it which would have shattered upon the first impact and failed to protect against multiple impacts from that kind of weapon, and definitely not show "impact points" of twisted metal.

Correction: Doc is a brilliant scientist as well as an inventor. He had the time and the ability to invent his own special material that works like no other material known to man. If he can invent a time machine, I'm sure a bulletproof material would be easy for him.

Damian Torres

Corrected entry: At the very beginning of the film we see the machine Doc has invented to feed his dog. It takes a can of dog food and positions it under a can opener, and the lid is held by a magnet after it is cut off. The machine then tips the contents of the can into a bowl which holds three or four days worth of dog food, indicating that nobody has been around for a while. So, who has been removing the lids from the magnetic holder?

Correction: The previous lid gets knocked off when a new can is picked up.


Corrected entry: California license plates only allow for 7 letters. But the Delorean has a California plate with 8 letters (OUTATIME).


Correction: Actually, the "OUTATIME" plate is just a vanity plate (obviously added by Doc). The DeLorean has a real, registered California plate on its opposite end: 3CZV657.

Corrected entry: When Marty goes to see Doc in 1955 we see Einstein as a puppy. This would mean that in 1985 Einstein would be 30 years old. Though not completely impossible (the oldest dog in the world ever was 29) it is highly unlikely.

Correction: The dog in 1955 is a different dog. The Doc even calls it by a different name after another famous scientist, Copernicus.

Craig Bryant

Corrected entry: When Marty is in the Delorean ready to go back to 1985, he gets upset that Doc Brown tore up the letter and that he didn't have enough time to warn Doc about his future death. When Marty realizes that he can use the Delorean to go back early and warn Doc Brown of 1985 that he will be killed, Marty says,"Ten minutes oughta do it." Marty actually gives himself eleven minutes.

Correction: So he can't do math in his head in a few seconds. Character mistake.

shortdanzr Premium member

Corrected entry: In the escape from the Libyan chasers, watch the ending of the chase. Marty already pushed the car to 90 on the analog speedometer, but the digital barely even made the jump to 88.

Joseph Z

Correction: Analogue speedometers are not, as a rule, particularly accurate, hence Doc's choice to put in a digital version. It's not unreasonable that the two could differ in their reading by several miles per hour.

Tailkinker Premium member

Corrected entry: At the point where Marty shows the Doc the video camera from the future and hooks it up, the recording plays. Then Marty fast-forwards the video. While fast-forwarding, when the Doc lifts the camera up and turns it around to admire the technology, the blue wire falls off the video camera. When resuming play after a few seconds, the video turns out to be just fine, though without the cable, the image/sound or electricity should have been interrupted.


Correction: That's the cable to the main electricity supply, which also works as a battery charger. So as long as the battery on the camera is already charged, it will keep working.

Corrected entry: Whenever someone talks about the 1.21 gigawatt's needed to power the DeLorean, they say it as "jigawatt" instead of "gigawatt" (subtle difference). There is no such thing as a "jigawatt". A "gigawatt", however, is possible, however unlikely (ref. Doc says the only way to have 1.21 gigawatt's instantly is with a bolt of lightning).

Correction: The word can be pronounced either way:

Corrected entry: When the time machine with Einstein inside disappears, it sends a trail of flames forward. They go past Marty and Doc's feet, yet in the next shot the flames are still coming at them, rather then behind them.


Correction: There were flames in front of them too. The flames behind them were not as strong since the car was disappearing and burned out sooner then the flames in front of them. Just like when you accelerate quickly and spin the tires. The marks left where you started spinning your tires are much darker then where your wheels stop spinning are.

Corrected entry: At the end when George's book is delivered, Lorraine says it is his first novel. If that is the case, what has he been doing for the past 20-30 years to support his family and make them better off than they were at the start?

Correction: His improved self-confidence would have landed him a better job in the meantime. Also, just because it's his first novel doesn't mean he hasn't been writing; he could have published plenty of articles or short stories.


Corrected entry: In order for the time machine to stay in the same place geographically, it would have to move with the Earth's revolutions over the years. Otherwise, even a small time jump could leave the person miles from where he started. So the Doc is wrong in saying that it can't move through space as well as time.

Correction: In fact it would not only have to move with the Earth's revolutions, but with its orbit around the sun and the sun's movement through the Milky Way as well. However, it is a long accepted science fiction convention that this is not taken into account in time travel stories. Time travel is impossible anyway, so you just have to accept the fantasy elements of the whole thing.

Corrected entry: To get Marty back to 1985, Doc has to time the Delorean's trip just right to have its hook hit the wire when the lightning strikes. Putting aside the wild notion of timing something to the exact millisecond, the alarm in the Delorean goes off while the car is stalled. Marty takes several seconds to get the car started again, which is going to throw off all of the calculations required to get the Delorean to the lightning strike and make Marty miss it.

Correction: They were based on Marty accelerating at a specific rate; all he has to do is accelerate faster to catch up, though of course he has no idea how much faster and gets lucky.


Corrected entry: After the Delorean goes back to 1985, it crashes into the building in front of it (a newsagents, or some kind of store). If it was going at 88MPH, shouldn't it be totally wrecked? No wonder it doesn't start.


Correction: We see (from Einstein's trip) that the time machine can stop very quickly after the jump. It possible that Marty stopped very quickly after the jump to the future and wasn't going very fast when he hit the building.

Corrected entry: When Doc and Marty are confronted by the Libyans in the Mall, the Libyan who is driving curses when his van won't start. As he curses, you can see he is not actually saying anything at all.

Correction: In the scene described, it seems like the words being said are being made by the guy driving. But if you watch that scene with the commentary (from the dvds), you find out the line is actually "damn soviet gun", being said by the terrorist who is standing trying to shoot (and his gun won't work), rather than the one driving who is in the shot. Before I saw the commentary, I thought it was the man driving who was supposed to be saying "damn son-of-a-gun" as well.

Corrected entry: Near the beginning when Biff returns George's crashed car, after the discussion about who will pay for it etc., Biff goes to the fridge and gets a beer. He complains that George only has 'Lite' beer for him, but if you look on the fridge door it seems there are 3 cans of what appears to be 'regular' Budweiser.



Correction: He just didn't look in the door and just assumed there was only lite beer.

Vernon Gilmore

Corrected entry: Between scenes Marty's shoes change, e.g. in the skateboard chase scene he is wearing black converse shoes, but when he is in the time machine travelling back to 1985 he is wearing white Nike trainers.

Correction: Not a mistake. After Marty says "Yeah, I can spend a week in 1955." Doc says "first, we have to get you out of those clothes" - this is so Marty blended in with current fashions of the 50's. When Marty is going back to 1985, he claims that he isn't going back in his 50's clothes - "you think I'm going back in those clothes?.", or something to that effect. It was all done to make Marty less suspicious to the people around him.

Corrected entry: When Marty saved his father from being run over by his grandfather, he had automatically altered the future. Shouldn't he and his siblings have disappeared altogether?

Leonard Hassen

Correction: The timestream, as portrayed in the films, is quite resiliant and resistant to change, which is why Marty doesn't vanish immediately. As time passes in the new configuration, that resilience is overcome and things begin to disappear from the timeline, beginning with his older siblings (who are closer to the point of disruption) and ending with Marty himself. Fortunately Marty is able to get the timeline back onto a course that includes him and his siblings before that happens completely.

Tailkinker Premium member

Corrected entry: Marty calls out to the band, "Alright, this is a blues riff in 'B'..." however, the recording (both the one present in the film and Chuck Berry's) is in Bb (B-flat). Also Michael J. Fox's hands are playing the song correctly in Bb (B-flat).

Correction: Actually, B flat is referred to as 'B', and B as 'H', by many musicians, especially educated blues players.

Corrected entry: In the first scene, when Marty enters Doc's lab, you see him kicking the keys back under the mat, but at the end of the scene, you see him tossing the keys onto the table.

Correction: The keys that Marty tosses are part of the amplifier equipment that he has just blown up.

Corrected entry: The first time that we see the Enchantment Under the Sea dance, the speaker on the left of the stage is sitting on an upturned pepsi crate, but in later scenes, including when Marty kicks the speaker over at the end of 'Johnny B Goode' the crate is gone.


Correction: There is more than enough time for the band members to move the Pepsi crate-there are scenes in between when the Pepsi crate is there, then disappears, and they could have removed it then.

Corrected entry: When the DeLorean is struck by lightning, there is a second stunt person in the passenger seat of the DeLorean. Since they never re-shot this scene, you can see it in all three BTTF movies.


Correction: No there isn't - that is just the seat and headrest. I have zoomed in and there is just a seat - no person.

Corrected entry: Near the end of the film when Doc is sending Marty back to 1985 Doc says "Which will be in exaclty 7 minutes and 22 seconds when this alarm goes off you hit the gas." From the time Doc sets the alarm to the time the lighting hits the tower is actually over 8 minutes.

Correction: Yes, you see more than eight minutes on your TV, but some shots take place at the same moment and some things are not even shown (like Marty driving along the road to the start line) so you can't tell how much time exactly passes between Doc setting up the alarm and the lightning striking.

Corrected entry: In the scene where George is walking into the cafe to talk to Lorraine, in the background someone asks for a Cherry Coke. In 1955, there was no Cherry Coke.

Correction: Pre-made Cherry Coke did not exist, but 'Cherry Coke' (a Coke with a shot of cherry syrup added) was a common soda-fountain item for many years before Coca Cola introduced the 'official' product. See and

J I Cohen

Corrected entry: After the DeLorean arrives in 1955, the speedometer shows the car is decelerating. However, just before crashing into old man Peabody's barn, the speedo shows it go down to 49, then start going up again.


Correction: After the shot of the speedometer going up again, you can see a wide shot of the DeLorean, and you can see that it has just gone over a lump in the ground. It began accelerating again because it went down the lump.

Corrected entry: In the beginning when Marty is blasted to the other side of the room by the huge speaker, the shelves behind him tilt over, spilling all the papers onto him, leaving the shelves completely empty. In a closeup though, another stack lands on his head from nowhere.


Correction: Look closely at the tippy-top of the shelf. When the papers fall, the edges continue up.

Corrected entry: In the scene where Marty traveles back in time and crashes into the barn, the DeLorean is facing the opposite way from where it crashed in from. And furthermore, the barn doors were already open when he drives into the barn, but when the family enters the scene, the barn doors had to be opened.


Correction: When the DeLorean goes into the barn, it could have hit the side of the barn and swerved around, which explains it facing the other way. As for the door having to be opened, it wouldn't have taken much for the door to simply swing back by itself and latch itself up.

Corrected entry: Wouldn't the Doc have a problem breathing in the beginning of the movie when the Delorean is backing out of a smoke filled semi-truck? And why is there so much "fog" coming out of the car when the Doc first gets out?



Correction: Just because there's smoke in the truck it doesn't mean the car is actually full of it. Also, it could well be some form of coolant as we see how hot the car gets, which explains why there is "smoke" there. Plus depending on the type of "smoke" it wouldn't necessarily affect his breathing.

David Mercier

Corrected entry: We continuously see that the DeLorean travels through time, not space (for example, if you departed in California, you would not arrive in Australia). Putting that, and the fact that Hill Valley is in California, into consideration, if you did use the car to go to the signing of the Declaration of Independence or the birth of Christ, as Doc suggested at the beginning of the movie, you would have to take either a cross-country road trip, or an across-the-globe road trip, the latter of which, I need not tell you, is impossible.

Correction: I know this is marked as a "deliberate" mistake, but actually Doc is using these well-known dates as an example, showing where you *could* go, *if* you were in the right place.


Corrected entry: This is also for the other two.When the doc sends Einstein back in time, you see that it is covered in ice, but in the other time travels there is no ice nor is it the slightest bit cold

Correction: The correction is wrong. Doc did not send Einstein back in time. He sent him to the future. Only then the car gets covered in ice, such as seen at the end of the film when Marty returns to 1985.

Corrected entry: In the scene when the clocks are chiming, Doc says to Marty all of the clocks are 25 minutes slow, but in the opening scene with the clocks, there are two that are set at 8:10 (one on the coffee maker and and a small black clock next to the TV). The rest are set at 7:55.

Correction: Doc probably means all the clocks involved in his experiment, not all the clocks in the house.


Corrected entry: When Doc is attempting to hook the cable to the clock, in 1955, he has on shoes with Velcro. Velcro had not been invented yet.

Correction: Utter nonsense. George de Mestral was granted a worldwide patent for Velcro in Switzerland in 1951, and the US patent followed in January 1952. It was an instant hit and all sorts of Velcro products flew off the shelves, including Velcro shoes.

Corrected entry: In the opening scene of the enchantment under the sea dance, If you look at the sax player's fingers, they aren't moving the slightest bit, yet he is playing loud and clear.


Correction: The sax player is holding the sax with two hands, so if the submitter was only looking at the top hand, they wouldn't have seen that the bottom hand was moving when the top one wasn't.

Corrected entry: In the clock tower scene at the end of the movie, just as the Doc is about to jump off the clock tower and slide down the cable, the clock above his head changes to 10:04. This shouldn't happen until Marty hits the wire with the DeLorean. (Please note: This is not the same mistake as the one where the the clock changes split seconds before Doc looks up at it-it is the scene when he is about to jump off the tower and slide down the wire).


Correction: Although the clock showed 10:04, the clock doesn't show a second hand. There are therefore 60 seconds to play with after the clock changes until the clock hands would move again to 10:05. During this period, Doc can slide down the cable, detach and replug in the cable and allow for the DeLorean to come down the street and hit the cable when the lightning strikes, all still as the clock hands show 10:04.

Corrected entry: When George and Marty are at the gas station getting ready to confront Lorraine about the dance, George's hair is messy and ungroomed, when the shot changes to him walking away, his hair is nice and combed.


Correction: Just before Marty and George go into the cafe, Marty says "can you take care of that?", and he is looking at George's hair, as George is running his hand through it. We can therefore assume that Marty was talking about George's hair, so just before they go into the cafe, George combs his hair.

Corrected entry: At The End of the movie, when Marty and Jennifer are in the DeLorean with Doc, Marty says "You don't have enough road to get up to 88 miles an hour". But only a few hours ago, minutes to the viewer even, after Doc dropped Marty off at home, we see the DeLorean back out of the driveway and speed off, and we hear and see the sound and light of him going into the future down the same stretch of road. Marty is either not good with depth perception or the Doc must've driven through someone's house to get up to 88 miles an hour.

Correction: When Doc Brown goes into the future by himself, we see the DeLorean pull out of the driveway and race down the street, out of view, before it turns around and races past again and vanish into the future. Doc has apparently gone far enough down the street before turning around to give himself enough room to accelerate. After he comes back to pick up Marty and Jennifer, he only pulls out of the driveway rather than driving further down the street as he had before, prompting Marty's comment.

Corrected entry: Anyone else find it ironic that Einstein the dog was the world's first time traveler, while the real Einstein was the one who said that time travel is impossible?

Correction: Part of the "strange" world that Einstein explained in 1905 in his theory of relativity is that time and space are joined in our universe as a four-dimensional fabric known as space-time. Stranger yet is the concept that both space and time warp as mass or speed is increased. Einstein actually proved that time travel was theoretically possible, then spent the rest of his life trying to disprove it.

Corrected entry: When Doc is trying to fix the wire on the clock tower, its caught under the tree and doesn't reach. Yet then he twists it up twice and slides down it to fix the part on the ground. If it wouldn't reach when it was stuck under the tree, how on earth would it fit if it's wrapped twice around the arm on the clock?

Correction: In the initial attempt, the wire is caught under the tree but still attached to another wire (the one the Delorean will hit). Doc then breaks that connection, so the wire moves and the connector at the end of it gets stuck to the tree. Even though the wire is still under the tree, he has more wire to wrap around the arm of the clock.

Corrected entry: At the beginning of the movie the spilt second after the Amp blows up and Marty is jolted back, you can see the cable that is hooked to him.

Correction: This is probably just the cable that connects the guitar with the amp. Also, the speaker blows up, not the amp.

Corrected entry: In the beginning of the film Doc's address is 1646. When Marty is at Doc's house in 1955 his address is 1640.

00:05:35 - 00:47:25

Correction: In the present Doc is living in his garage not his house. The garage is further down the street from where his house was, so the number is higher. Why? His house burned down. You can read about it during the opening scene, when we pan through Doc's garage.

Corrected entry: When Marty first goes to Doc Brown's house in 1955, Doc mocks Marty's claim that he has come back in time from 1985. When Marty tells him Ronald Reagan is President in 1985, Doc mocks him again and says "I suppose Jane Wyman is First Lady." Ronald Reagan divorced Jane Wyman in the late 1940s and married Nancy Davis in 1952. The fact was well known to anyone who kept track of movie stars so if Doc knew who Reagan was married to the first time, he would know in 1955 that Reagan had been married to Nancy Davis for three years by the time of the scene.

Correction: He's mocking Marty. He is saying that it would be about as believable for Jane Wyman to be first lady with Ronald Reagan as it would be for Ronald Reagan to become president in the first place.


Corrected entry: If Marty had made such an impression on his parents which is how he was supposed to have got his name, surely they would have called their 1st son Marty and not Marty who was their 3rd child?


Correction: His older brother could have gotten a family name. Which would trump an old friend's name.

Jack's Revenge

Corrected entry: If Marty's family is so much more successful after his trip back in time, why do they still live in the same small house?


Correction: It could be a nice neighborhood. A larger house might have had a high property tax. Just because they moved up in the wealth sector doesn't mean they would have moved far above the upper-middle class level.

Corrected entry: In this movie when you go back in time you would get there at the exact time you on the time machine. At the end of the movie when Marty figures out he has all the time he needs he sets the time machine to 1:24 or some other hour with 24 as the minutes. When Marty gets back to 1985 he crashes into the movie theater, drives down the road, and says hi to the homeless guy. After all that Marty looks up at clock and you see that time just went from 23 to 24 minutes. Wouldn't it already be a few seconds after 24 minutes?


Correction: Not all clocks are synchronized. The clock in town might have been set a few seconds behind the clock in the DeLorean.

Corrected entry: There is simply no way a VW bus (driven by the terrorists) would be able to keep up in a race with a DeLorean (driven by Marty).

Correction: Marty has to keep going around the tight corners in the parking lot, therefore slowing his speed considerably. It's only when he has a straight stretch in front of him that he has enough room to really get up to speed, and get away.


Corrected entry: When George walks in to Lou's, he orders a chocolate milk. How could Lou have made a chocolate milk in less than three seconds?

Correction: Some soda shops have milk machines (I had one at the cafeteria in the dorms at college), one side is regular milk, the other is chocolate. Lou probably made the batch of chocolate milk that morning, and all he had to do was push a lever and fill the glass.


Corrected entry: Near the end when Marty gets locked in the trunk he says the keys are there with him. Why would the keys be in the trunk?.

Correction: It was an accident. Similar to locking your keys inside your car. My parents have done this several times with their older cars.


Corrected entry: Wouldn't Marty's parents and Biff Tannen be amazed and freaked out that their son Marty is identical to Calvin, the kid that played a major part in all their lives, and who they would definitely remember?


Correction: It's 30 years later, I doubt they remember a guy who they only knew for a few days back when they were teenagers well enough to recognise him as Marty.


Corrected entry: In the scene where Marty is playing "Johnny B. Good" there is an overhead view of the dance in the gymnasium. If you look quickly, you can spot the 3 point line on the gym court. The three point line did not come into existence until the late 1970s.


Correction: Having just watched the scene in the gym three times, there is definitely NOT a three point line on the floor in any shot. In fact, it was intentionally supposed to be a VERY short basketball court. The top of the keys almost touched. There wasn't even room for a full center jump circle. (I have seen gyms like this even in the 80s.) Several shots show the floor and none of them shows a line that could be considered a three point line. It simply is not there and wouldn't be there since they didn't shooot the scene on an NBA gym which would be the only gym that would have one in 1984-1985 during the filming of this movie.

Corrected entry: When they're refilling the car with plutonium, after putting it in, Doc removes his helmet, and says "it's safe now, everything's lead lined". Fair enough, except he then takes the container the plutonium was in back to the box (which contains a lot more plutonium), flips the lid, and shoves it back in. If that process was safe, which bit of the reloading process was dangerous?


Jon Sandys Premium member

Correction: The safety gear was in case anything went wrong when the plutonium was being sucked into the car, not for handling the plutonium.

Corrected entry: In the scene where Marty & Doc are watching the videotaped experiment, Doc picks up the camcorder to admire it. As he does, a wire that was connected to it falls off, yet the playback is unaffected.


Correction: If the wire was the AC adapter, and the battery had charge left, playback wouldn't have been affected. Doc would have likely had the AC adapter and all the patch cables in his suitcase stored in the DeLorean's hood-trunk. Perfectly reasonable assumption, since hosehold-standard voltage hasn't changed for many decades, and it isn't likely to be changed in 2010 (Doc's original idea for his destination year).

Corrected entry: When Marty encounters Doc Brown for the first time in '55, Brown asks him who is now the president (in the future) and Marty responds "Ronald Reagan" (pronounced Raygen); then Brown says "Ronald Reagan the movie actor?" When Ronald Reagan was a movie actor, he pronounced his last name "Reegan" (he changed the pronunciation later when he got into politics), so Brown shouldn't have been able to make the association.

Correction: Doc may have easily made the association, even if he had thought Marty pronouncing it incorrectly. Many times, people hear what they think they hear, and if you say the name quickly either way, it could be taken as either pronounciation.

Corrected entry: In the scene where Marty is playing Johnny B. Goode, and someone cuts into George and Lorraine's dance, Marty starts disappearing. Then he comes back, pushes the guy down, and kisses Lorraine, resulting in Marty reappearing. But George did that on his own, without Marty interfering, so why should he have disappeared in the first place? He was always going to come back and assert himself - it's not like the timeline was being changed.

Correction: According to the films, the future is never set. For instance, in the third film, at first it's Doc's name on the tombstone, then no one's name, then Marty's name starts to appear, then finally the tombstone diasppears altogether. This happens in response to how Doc and Marty act and make decisions. The same idea applies to the dance- when it looks like George is just going to walk away, Marty's existence is in danger, but when George changes his mind and returns to Lorraine, the future has changed, and Marty's existance is secure.


Corrected entry: After Marty gets off the stage after playing "Johnny B Goode" he runs into his future parents. His father thanks him for all his good advice. His mother asks him if they are ever going to see him again. Wouldn't they just assume that Marty will be back in school on Monday?


Correction: Although I don't think it is ever said, it is made clear throughout the film that Marty (posing as Doc's nephew) is only at the school for a short time, whilst staying with his 'uncle'. The night of the dance is obviously his last night before returning to his normal school.

Corrected entry: In the beginning, Doc and Marty meet at the Twin Pine Mall, and we learn that Doc has built a time machine, which runs on plutonium. He has a heavy case filled with several containers of plutonium, one of which he inserts into the DeLorean. Doc is then killed and Marty flees to 1955. When he goes back to 1985, he plans to get there ten minutes early in order to prevent Doc's death. However, the car runs out of gas and Marty has to run to the Lone Pine Mall on foot, thus getting there too late. He is devastated that Doc is dead. Why? There is more plutonium two feet from him, in the truck. He can just take some, put it in the car, and come back ten minutes early again--or thirty minutes, or an hour, or a day, or whatever he wants.


Correction: True, but this solution probably wouldn't occur to him moments after he saw Doc murdered, so it is conceivable that he would grieve for a while and then hit on the idea if Doc hadn't been wearing body armor.

Corrected entry: When Marty first arrives in '55, he has to walk 2 miles into Hill Valley from where he leaves the car. But back in '85 he can get from downtown (crash near the movie theater) to the Mall in less than 10 minutes. Why need a skateboard when you can run that fast?


Correction: In 1955 Marty drives for a while from the future 'Twin pines/Lone Pine' mall spot to where he parked the car (the future Lyon Estates). It was dark when he started driving and daylight when the car gave out on him. Not knowing that he was in the past he probably tried to drive from downtown Hill Valley to his home. The mall is a lot closer to downtown Hill Valley. Maybe even in Hill Valley.

Corrected entry: In the scene where Doc is demonstrating the time machine for the first time, he enters several dates he could conceivably go to, one of which is the birth of Christ, which he enters as Dec. 25, 0000, but there is no year 0. It goes from 1 B.C. to 1 A.D.


Correction: Yeah, it's something Doc should have known, but he was simply demonstrating the circuits to Marty, so I dunno if this could be counted as a filming mistake. If Doc was that concerned with inputting the actual date, it would have been (according to historians) sometime in March or April of 4BC.

Corrected entry: Do you honestly think that Marty's parents wouldn't think it was the slightest bit odd that their son happens to look and talk and dress EXACTLY like the boy that hooked them up in high school?

Correction: Ever realized all of a sudden that someone you know bears a resemblance to someone you knew a long time ago? Sure - it happens... (either Marty's parents haven't reached that point yet, or they simply never noticed - it's been 18 years, remember...)

Corrected entry: The speedometer of a Delorean doesn't go past 85 mph. There is a Delorean shop in the town I live in with about twenty Deloreans behind a fence. I checked it out and none of them had a speedometer that goes past 85. Makes you wonder how it was any different in the car they used for the movie.

Correction: DeLoreans came with an option for a 165MPH speedometer.

Corrected entry: When the time machine comes back from its first ride with Einstein, the car spins and isn't icy. However, when a different angle is shown, the car has ice on it.

Correction: The shot of Marty and Doc is long enough for ice to form, given how cold it is.

Corrected entry: Who wrote the song "Johnny B Goode"? It can't have been Chuck Berry, because his cousin Marvin held the telephone up while Marty was playing the song on stage, and Chuck heard it first then. It can't have been Marty either, because he heard the Chuck Berry version of the song while he was growing up. So we have a paradox - nobody ever wrote the song. Whoops - end of the universe time.


Correction: Not a paradox at all - originally Chuck Berry wrote it and Marty heard it, but in the altered timeline Chuck Berry got his inspiration from Marty. Not a paradox, just a change.

Corrected entry: Watch the "shooting" scene in the beginning in slow motion. You will notice Eric Stoltz running for cover instead of Michael J. Fox. (Eric Stoltz was the original Marty.)


Correction: All the shots of Marty running are quite clearly Michael J Fox.

Corrected entry: When Marty finally goes back to 1985 they pan up to a shot of the clock tower, then at the bottom of the screen it suddenly says 1985. The shot is still on the clock tower but if you look at the trees and branches in the shot they have not changed for 30 years?

Correction: It doesn't pan up to it, it's a cut. There's nothing to suggest that the shot of the clock tower is meant to be in 1955.

Corrected entry: In the scene where Marty is trying to call Doc from the coffee shop, his digital watch beeps. He is never shown removing it and it's the last we see of the watch. Wouldn't Marty have used the digital watch as proof to Doc he was from 1985? Would it not have been more accurate for timing in the scene when Marty drives towards the clock tower (to go back to '85) than of the analog alarm clock?

Correction: We do see the watch two more times in the movie. When Marty and Doc are uncovering the car to get ready to send him back to 1985, Marty has the watch on, but when he drives the car down the street it is back off. Then we see it again when Marty gets back to 1985 and is at the mall watching himself getting chased by the Libyans.

Corrected entry: Doc uses plutonium in the DeLorean's flux capacitor via a container of liquid. Plutonium is typically formed in rods of packed pellets, not in a liquid form.


Correction: The liquid just surrounds the little rod of plutonium in it. Watch when Doc refils the Delorean, he turns the cylinder and the little rod gets sucked down. That is one of the rods you are talking about.

Join the mailing list

Addresses are not passed on to any third party, and are used solely for direct communication from this site. You can unsubscribe at any time.

Add something

Most popular pages

Best movie mistakesBest mistake picturesBest comedy movie quotesMovies with the most mistakesNew this monthMamma Mia! mistakesPretty Woman mistake pictureCharmed mistakesHide and Seek endingThe Shining questionsThe Incredibles triviaStep Brothers quotesShrek plotMel Blanc movies & TV showsTop 15 biggest Harry Potter film mistakesStar Wars mistake video


Marty McFly: Calvin? Why do you keep calling me Calvin?
Lorraine Baines: Well, that is your name, isn't it? Calvin Klein? It's written all over your underwear.



When Biff and his goon friends are in Biff's car, as they chase Marty on his borrowed 'skateboard', the car's rearview mirror repeatedly disappears and reappears, and the side mirror changes from round to square repeatedly.



The farm where Marty arrives in 1955 belongs to a man called Peabody, and he calls his son Sherman; both names are a tribute to "Sherman and Mr. Peabody", two cartoon time travellers.