Continuity: In the part when the two American officers are looking around in Anchorage, USA, and come across the dead woman at the News Studios you can clearly see her blink 2 or 3 times as the camera pans out.

Continuity: When Moira is watching the submarine leave during the last scene, the deck is nearly submerged and waves are washing over it. When the shot changes to the Captain on the conning tower, the deck behind him is dry as a bone.

Other: At the end of the movie when the family is on the bed, supposedly dead after ingesting suicide pills, you can see the little girl breathing as the camera pans away.

Factual error: The USS Sawfish is supposedly a nuclear powered submarine, but the shots of her entering Williamstown show diesel exhaust coming from her. (Apparently they had to substitute an Australian diesel-electric submarine).

Other: According to the plot, no life is possible in the Northern Hemisphere by the time the film is set. Yet, when the sailor who has been sent ashore to look around the San Diego refinery enters the premises (more precisely, when we see the smoking-prohibited sign on our right and his left) a bird can be seen flying in the upper left-hand corner of the screen.

Continuity: During the long shots in final scene as the submarine is leaving, the wind is so strong that the flag flies straight out behind the conning tower. During the close-ups of the crew, their shirts and hats show no wind at all.

Continuity: During the Grand Prix when the burning car is next to Julian, he has three cars immediately behind him in the close-up shot. When the shot quickly changes to a wide view as the burning car crashes, Julian is now behind the other cars.

Continuity: Two scenes in the movie show a closeup of the tower on the submarine with a plexiglass shield in front of the actors. Both times you can make out the reflection of trees as the camera moves.