Factual error: While the Leonov has a centrifugal section to simulate gravity, the ship's bridge is not part of it (evidenced by the stationary views outside its portholes). Yet in various scenes, including the one when Floyd rushes in to discuss his plan to return to Earth sooner with Tanya, gravity seems quite evident. Floyd marches across the compartment onto the raised pilot area's floor, then steps down from it, his foot landing audibly. Tanya's open jacket also hangs down normally as she moves about. Yet when Floyd demonstrates his plan using two pens, they float in mid air. (01:26:50)johnrosa
Audio problem: When the Terminator breaks into the police station, he has an auto-shotgun in his left hand, and a machine gun in his right. Before he kills the power in the building, he comes to the end of a hall, points his shotgun through a doorway, and shoots. A machine gun sound is used for the blast, instead of a shotgun sound. (01:00:28)
Continuity mistake: The whole time sequence in the last part of the movie is messed up. After trying to nab the bad guys at the hotel, Tom Selleck goes home and puts his son to bed, then is called back in to work, and then the rest of the film is supposed to be the same evening, but it was already late night.
Factual error: According to "The Doomsday Machine", full impulse drive is one-quarter the speed of light. In the first two movies, Enterprise used thrusters as opposed to impulse drive to leave Spacedock, confirming the notion that impulse drive is far too fast to leave such a (comparatively) small structure. Styles, however, orders Excelsior to one-quarter impulse, which is 18,750 km/s. In one second, she will travel half again Earth's diameter. From the time he gives the order to the time we see Excelsior clear spacedock's doors is approximately 40 seconds. Even allowing 30 seconds to go from rest to one quarter impulse, spacedock must be 13-15 times bigger than Earth! That's some serious engineering. (00:23:45)Grumpy Scot
Continuity mistake: At the end of the film the hero follows the bad guy into a reservoir. When he gets there, the bad guy has dug a very deep hole in the ground in which he wants to bury the girl. But the bad guy arrived only two minutes or so before the hero and didn't have the time to dig a hole of that size.
Continuity mistake: About 70 mins into the film, Michael Caine pulls into a petrol station. All in one shot: Michael Caine asks for the car to be filled up, the attendant puts the nozzle in the car and starts filling it (using the "hold-on" feature now disabled on most pumps), takes the £10 proffered, goes back towards the office, Michael Caine spots Robert Powel, gets in the car and starts the engine. The next shot shows Michael Caine driving away from the petrol station with nobody close enough to have disconnnected the fuel hose, but no apparent fuel hose, or spilt fuel, lying on the forecourt, and the attendant not too worried about a damaged fuel pump or spilt fuel. In the next scene as Michael Caine pulls off the road into a farmyard, the filler cap is visible on, with Robert Powel passing by seconds later; Not enough time, especially for a fugitive, to have stopped, got out of the car, hobbled round, put the cap back on, hobble back, got back in and continued his escape. (01:10:15)