Dracula Prince of Darkness (1966)

Continuity mistake: Helen attacks Diana in Dracula's castle and is burned by Diana's crucifix. In a jumble of shots Helen reacts to the burn; Diana is seen holding up the cross, then not holding up the cross, and then holding it up again. (00:59:20)

Factual error: At the end, during the master wide shot of Diana and Shandor (C19 characters) standing over the castle moat, there is a modern aeroplane's vapour trail high above their heads.

Trivia: Dracula does not appear until 45 minutes into the film.

Trivia: Count Dracula (Christopher Lee) doesn't have a single line of dialogue in the film.

Trivia: In an interesting possible predictor of the future, the British husband and wife heroes of this British film are named Charles and Diana.

Charles Kent: Guess who?
Diana Kent: Horace Peabody.
Charles Kent: Right first try.
Diana Kent: Did you enjoy your port, cigars and man's talk?
Charles Kent: No, not very much, but then, you know, it takes female company for me to sh... who's Horace Peabody?
Diana Kent: An old beau of mine. Before your time, darling.
Charles Kent: There was no before my time. You were a schoolgirl in pigtails.
Diana Kent: Even schoolgirls have their moments.

Alan Kent: You forget about all of this in the morning, you'll see.
Helen Kent: There'll be no morning for us.