Continuity mistake: After crashing through the guarded barrier of the base, David drives the stolen pickup truck and burning debris from the electrical storm falls onto the hood of the truck. In the next close-up the burning debris is shaped differently. Then after they crash through the wall, in the wide shot there is no burning debris on the hood. Yet, in the next close-up there's plenty of burning debris, but then in the next shot there is no burning debris again, just a smoking engine. The building debris surrounding the truck and behind it, in the first shot differs from all the building debris in the second shot as well.
Continuity mistake: When Dr. Longstreet, in 1984, is in his office, in the wide shot the rolodex is near the telephone and papers. In the close-up shot of his desk as he sits down, the rolodex is not there. The globe on the file cabinet also shows different continents in the close up than the wide shot.
Continuity mistake: David, Jimmy and Allison drive away in her car, and there's a rear view mirror on the windshield. In the next shot of them, there is no rear view mirror. Driving down the highway and the close-up of Allison looking through the mirror at David, there's obviously a rear view mirror again. In the next shot of the three of them, there's no rear view mirror again. When Allison rescues David, inside the car shows a rear view mirror. Then view from outside, as David climbs over the front seat, there's no mirror yet again.
Continuity mistake: In the opening scene, as Dr. James Longstreet sits at his desk, his left white shirt cuff is folded over the cardigan. In the next shot, while his arm did not move, his cuff is half folded, and while his arm rests on the desk not moving, in the next shot his cuff is completely unfolded. He also removes his glasses and in this side shot he does not have his left hand near his head. In the next continuous shot from behind, his left hand is up and his head is leaning on it.
Revealing mistake: Going to his father's old place, David and Allison turn right on the corner, pass some stores and then turn left to drive into the lot of the Texaco station. The reflection shown in the stores' windows across the street is not at all what is supposedly across from those stores. Also, when they start to pull away from the station a set of studio lights are reflected in the side back window of the car.
Audio problem: In 1943, a top secret Naval experiment went wrong and David was sent forward in time to 1984, with his friend Jimmy. In 1984, David and Allison, a girl fom the present day, are staying in a hotel room. David picks up the talking travel alarm clock and fidgets with it. Yet, in the shot of Allison the alarm clock is still on the nightstand between the two beds. Then as he puts the alarm clock back on the nightstand, in the shot of Allison, the alarm clock is on the nightstand even though we hear the sound of him actually placing the alarm clock down.
Continuity mistake: David and Allison drive away from the station, after David learns of his father's death. When the camera is just on Allison, sitting in the passenger seat, the view of the background behind the car is very different than the view when the camera is just on David.
Continuity mistake: When Allison has her arm X-rayed at the hospital, she is wearing a star pin on her blue sweater. In the shot preceding this one, as she follows Jimmy's gurney down the corridor with the doctor, since her jacket is open it is plain to see she is not wearing a star pin on her blue sweater. Because of the position of the pin, it should be seen.
Continuity mistake: In the hotel room, David watches TV and next to the TV are plastic cups. In the shots facing David the cups are right up against the TV and there's a phone book lying on top of the TV set. In the shots facing the TV, the cups are further away on the dresser and there is nothing on top of the TV set.
Continuity mistake: Dr. Longstreet takes photographs out of the two top secret folders and places the folders and some photos on the desk to his left. In the next close-up as he looks at the photographs, the folders and some other photos are now rearranged in the center directly in front of him. In the next front shot, the two folders on the desk are to his left again.
Continuity mistake: When David and Jimmy are at Scotty's Junction, Nevada, Allison is on the pay phone outside the diner. In the first shot, the hanging phone book's open pages face left, in the next shot, they face right and in the third consecutive shot the open pages face left again.
Continuity mistake: At the hotel, David's blue shirt is lying straight on the pillow by the headboard when he opens the door to let Allison in. When she sits on the bed to make the calls, the blue shirt isn't straight in this shot. Also, the Chinese food containers' positions on the table in this shot differ from the shot when David stands up after slamming the phone down. Then when he sits at the table the containers' position change again in the next couple of shots, as does his blue shirt.
Continuity mistake: As David runs from the MP's in the restaurant he jumps down onto the bar from the second floor. The shot of the bar from above and the shot of him landing on the bar differs in regard to the items on the bar and placement of people. As David runs onto the first table from the bar, the food on the plate belonging to the man in the brown suit differs in the next shot as the man ducks to his right.
Continuity mistake: At the hotel when Allison knocks on the door David goes to open it, and the round table's 'folding sides' face a particular direction. In the next shot Allison puts the shopping bag on the table, and the 'folding sides' of the table are facing another direction.
Continuity mistake: Dr. Longstreet, in 1984, is in his office near the black file cabinet. Before he gets the files on the U.S.S. Eldridge, in this shot the plant is right next to a set of files on top of the cabinet. Once he removes the files he wants from the drawer, in this shot the plant is at the wall, further away from the files up on top.
Continuity mistake: David and Jimmy are running from the military helicopter, when they run into an electrified fence. Jimmy actually hits it and in the first shot he grabs hold of the fence with both hands, then he *removes* his right hand only to put it *back* onto the *electrified* fence. In the next close-up shot, Jimmy is standing at a different place along the electrified fence, this time right near the pole and Jimmy's left hand is now lower on the fence than it was in the previous shot. Then in the next back shot, Jimmy's left hand is higher up on the fence again.
Continuity mistake: David and Allison pull up to the corner across the street from David's father's old place. In the close-up of them in the car, the surrounding area around the car is completely different than the area shown around the car in the wide shot. Also in the wide shot we see cars parked to the right of the screen. After crossing the intersection, they pull into his father's old place, and we see the same sidewalk across the street, but none of the cars that were parked there in the previous shot are there now. Then when they pull away, again the parked cars are different.