Factual error: When the bombs are being taken down the lane, in the background where the lane meets the road a white mini can be seen passing the entrance.
Factual error: When the B-52 is flying low over Russia, the shadow on the ground is a Boeing B-17G, a World War II propeller driven bomber.
Revealing mistake: When Mr Witt rides out of the Zulu camp in a 2 horse cart at the beginning of the movie, just before it exits, you can see it's a stunt double at the reins.
Deliberate mistake: When Eliza is about to be bathed, the mirror keeps turning around between shots to avoid reflecting the filming crew.
Continuity mistake: Right at the end, the insurance man gives Charlotte Jewel Mayhew's letter and in the next shot of him, his hands are empty. But in the following shot he's holding the letter again.
Continuity mistake: Near the end, Charlie, badly wounded and after killing Jack and Sheila, staggers from the house. As he stumbles towards his car, there is a gated driveway with a car parked in it. A few seconds later, the car is no longer there. (01:33:45)
Continuity mistake: About 25 minutes into the film, Vincent Price puts two vampire bodies into the back of his station wagon. Viewed from the open rear door, the woman is on the right side face up and the man is on the left side face down, and he drives off to the pit. In the next scene, he parks the car at the pit and when he goes to unload the bodies, the woman is now on the left side face down and the man is one the right side face up. For people who have died and then been killed again, they sure did move around a lot in the back of that car.
Factual error: When the pursuing fighter jets are supposed to start their engine afterburners, we instead see a short clip of them firing their air-to-air missiles.
Factual error: The movie shows a 'jet' aircraft belonging to 'consolidated airlines'. The so called airplane is a laugh. It has two jet engines attached to the horizontal stabilizers. The landing gear appear to be bolted to the wings. During the movie this plane crashes and the engines are moved to a terminal to be examined. They are too small to be real engines. During the course of examining the engines, they are run inside the terminal building. One of the investigators stands 10 feet behind the jet intake and is not sucked inside. The cockpit is not even close to what one would find in a jet airplane.
Continuity mistake: When Bruno goes to the Captain, to ask for leave so he can go to his daughter's funeral, he places his cap on the desk in front of him. It slips to the floor, but a minute later his cap is magically back on the desk.
Factual error: At the start of the excommunication scene, the monks are chanting Dies Irae, a thirteenth century Catholic poem, but St. Thomas Becket died in 1170, almost a century before the poem was written.
Continuity mistake: After the opening credits, when it cuts to the overhead shot of Shannon sitting on the ground, he has a newspaper covering his head with its front page facing up. In the next shot, the newspaper over Shannon's head has a different front page. (00:06:00)
Visible crew/equipment: The shadow of a camera and cameraman are revealed on the left side while the President (Frederic March) is moving from one room to another (door jamb), after learning about Martin Balsam's death. (01:20:00 - 01:21:00)
Continuity mistake: Ingrid Bergman is sitting in the foyer of the hotel she is staying in. She orders a martini, which arrives pronto, but in the first shot, she picks up the drink and has a sip, and in the second shot, she isn't holding the glass anymore.
Continuity mistake: When Peter Fonda is hanging from a cliff with both hands over a waterfall, he is wearing his glasses. There is a cut to a shot of him not wearing glasses. When the movie cuts back to him shortly afterwards, he is wearing his glasses again. (00:32:10)
Factual error: In reality, Commodus did not die in the arena - he was strangled in his apartments in 192 A.D. by an athlete who was hired by a group of Senators conspiring against him.
Continuity mistake: The three enter a small cantina and start a fight and fire. The place is huge on the inside, with stairs to a second floor. From the outside it's just a small shack.