Continuity: 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.

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.