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? (00:26:15)
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.
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? (01:30:20)
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.
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. (01:27:16)
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?
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.
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.
Corrected entry: The DeLorean is an actual registered vehicle in California, with license plate 3CZV657.
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.
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.
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.