Continuity: When Marty is running through the car park you can see a person in the background in one of the shots but they disappear in the next shot, then re-appear again.

Visible crew/equipment: When Marty crosses the park in front of the court house and the camera pans around following Marty while showing the town, watch one of the building in the middle background. Part of the building is grey and has 2 windows and is supposed to have a slanted roof but if you watch closely, it appears that building is in fact only a wall with nothing behind it.

Continuity: When Marty lands on Peabody's farm and rams through the pine tree he then hits a scarecrow which flies over the top of his car. Then as they show it from the inside the scarecrow slams into the windshield - but how can it slam into his windshield if it is already over the car?

Continuity: Before his parents kiss, Marty's right hand begins to disappear. As he slumps to the floor both hands are visible holding his guitar.

Audio problem: Lorraine comes to see Marty in Doc's garage in 1955 to ask him if he will go to the dance with her. Just before Lorraine moves to the other side of the car from where she walked in, she begins to say something to Marty. The problem is that her lips don't move when she talks, I guess the right clip ended up on the editing room floor.

Continuity: In the chase scene with Marty and the Libyans, Marty is driving away from them. He changes into second gear but in the next shot he shifts into second gear again without changing back.

Continuity: In the first scuffle between Marty and Biff in the school cafeteria, they both grab a hold of each other's shirts until they were stopped by Strickland, but in the next shot, Marty is not holding on to Biff's shirt.

Continuity: In the scenes where Marty enters the Lyon estates, if you look close you can see a stop sign, but if you watch the next two movies the stop sign has been removed.

Continuity: Cafe 1955, when Marty enters for first time. The arrangement of the coats on the rack to the right hand side of the cafe doors change upon Marty's initial entrance and returning to the counter after using the phone booth.

Continuity: When Marty is riding his skateboard to school in the beginning, he waves to a driver and you can see his wearing a watch on his left hand. However, look at his left hand when he meets up with Jennifer, and you'll see that it's gone.

Continuity: At the beginning, when Michael J Fox is cranking up the amplifier, the dial marked "Primary power" initially rises from 100 - 120, then when he turns the "overdrive" knob, it's back at 110 and goes to max.

Continuity: In the scene at the dance where Marty is parked with Lorraine, Biff reaches into the car, and pulls Marty out. The first shot shows Biff grabbing Marty's shirt with one hand. In the next shot, from outside the car, it switches to the other hand, now on Marty's shirt. The action happens too quick for Biff to have changed hands.

Continuity: In the scene where Marty tells George his plan for getting Lorraine to go to the dance with him, Marty's shirt is sometimes tucked in and sometimes not.

Revealing: When Biff and his gang are chasing after Marty in their car around the Courthouse Square, in the shots that takes place in the Courthouse yard, you can see that it's Biff's stunt double that's driving.

Factual error: 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.

Continuity: Towards the very end of the film when George and Lorraine are unpacking George's new book, you will notice in the close-up of Lorraine's hands that they are actually someone else's for that shot. They are very aged and much larger than her real hands, which you can compare right away when the camera goes back to full view.

Continuity: When Michael J Fox's parent kiss and the family picture (with everyone standing on the grass) gets fixed, Michael places the photo on the guitar, gets very happy and starts playing the guitar enthusiastically. Seconds later, a brief shot of the guitar shows the picture empty: just the green grass, no people in it.

Continuity: In the escape from Biff on the skateboard, Marty collides with a couple near some steps. He somersaults over them head first, shoulders touching the ground, with his skateboard presumably being left at their feet where he hit them. After an angle change though, he's in mid-air again, with the man on the ground obviously pushing him upright, and his skateboard's now behind the woman's head in an ideal place for Marty to grab it. Some papers have appeared on the ground too.

Revealing: In the scene where Marty first arrives in 1955, right after Mr. Sandman starts playing, you can see a truck directly behind him. If you look closely you can see that the logo on the truck looks like a Miller Beer logo. That's because it *is* a Miller Beer logo. The "Y" is actually a stylized twirl off the "R".

Continuity: When Marty rides to the mall he is riding his skateboard, but after Doc comes out in the car, it's gone, then at the end of the film when Doc drops off Marty he has it again.