Continuity: At the end of the first film when Marty leaves the garage to greet Jennifer, he does not have a watch on throughout the whole scene. In the identical scene at the beginning of this film, Marty is wearing a black watch.

Continuity: Biff's 46 Ford changes from a convertible to a hardtop with the roof cut off during some scenes (notice the shape of the windshield frame and vent windows).

Continuity: When Lorraine, Biff and Marty are in the hotel in the alternate present, after Biff has said "...and all three of them?", Lorraine puts her drink down on the table with her left hand. In the very next shot, she is holding the drink in the other hand.

Continuity: When the Marty that played on stage comes down and talks to his mother, she says "Marty, that was very interesting *pause* music". In the first film there was no pause in that sentence when she said it.

Continuity: At the end of the preview for BTTF3, Marty and the Doc are standing in a position for their photo to be taken. The photo is taken, but on the photo their hands are in different positions to what they were when the photo was being taken.

Continuity: Marty's hairstyle is different in the starting scene in BTTF2 to what it was in the scene at the end of BTTF (It is flatter).

Continuity: In the scene where Marty is hanging onto the side of Biff's car as the sports scores are being said on the radio, Biff picks up the almanac to check them. You see him put it down in one shot, but when the shot switches to Marty's point of view, he puts it down again.

Visible crew/equipment: Just as Griff is about to crash through the front door of the court house after he is chasing Marty on the hover board, you can see someone (the director?) on some sort of crane in the reflection of the glass.

Revealing: When Griff and his gang are flying through the air and about to crash into the courthouse after the hover board chase, look at the girl on the left. Her legs hit one of the building's pillars, and her body rotates sideways, but she continues moving forward - obviously suspended by wires.

Continuity: When Marty's on the hover board on the lake, watch the Clock tower's entrance behind him: Depending on if it's a wide, medium or side shot, the number of guards change from one to two, or one that runs away but suddenly appears back in place.

Continuity: Near the end, when Marty is holding on to Biff's car and is trying to get the almanac, the direction of the almanac's cover keeps changing from shot to shot.

Continuity: In the tunnel chase where Biff is catching up with Marty, the speed of his car changes from going fast and gaining speed to driving at normal speed a couple of times in different shots. The distance between Marty and the car also keeps changing with this.

Continuity: When Marty first enters the Cafe 80's you can see behind him the two kids playing the working video game. The next scene that shows them the kids are still playing the game. However the third time you see the game it is now off with no kids in front of it. The next time it is shown the kids proclaim "they got it working" and walk from behind the machine and start playing.

Continuity: When Gramps is knocking Marty with his cane, right after he cries "Mr. Loooseer.", he puts his cane in his right hand, but a split second later it's seen on his left hand.

Continuity: When Marty gets out of the water after jumping from the hoover board, the board is a bit far from him. In the next shot it is right next to him, to help him pick it up and leave.

Continuity: In 1985A, when the punks fire at Strickland, there's a red flower in the pot closer to Marty. There's a first bang, angle changes and the flower has disappeared. If the bang had hit the flower Marty would've been injured, for he was behind it.

Continuity: When Doc, Marty and Jennifer have arrived in 2015 Doc tells them that the time of the day is 4:29 pm. However the destination time still shown on the time circuits' display from their time travel to the future tells us that they should have arrived at 4:29 am.

Continuity: In Part 1, at the dance the singer sings "A fool in love with you", Lorraine and George don't kiss. In Part 2, the same scene is re-built, and now when the singer sings that, Lorraine and George do kiss.

Revealing: When Marty and Strickland are talking in the Alternate 1985, pay attention to Strickland. Every time Marty is talking, you see Strickland moving his cheeks. He is mouthing Marty's lines.

Continuity: When Marvin, the band member, goes to call Chuck Berry about Marty's "new sound", the telephone he uses has a black neoprene coiled handset cord. In the first BTTF, the phone had a straight, uncoiled brown cloth handset cord (seen when he says, "Well then listen to this." and holds the handset out toward the stage). This isn't because the cord was stretched out, as neoprene cords can't stretch so much that they look uncoiled.