Revealing mistake: In several of the sanatorium scenes, you can see large pieces of cardboard attached to the lamps to affect the lighting.
Trivia: To accommodate all sorts of viewers, the studio also made a silent version of the film (for cinemas without sound equipment) and a Spanish-speaking version (to be shown in Latin America). The Spanish version is considered a better film, because it was filmed after the English takes each day, so the Spanish director and actors would watch the English takes and decide how to improve on them.Twotall
Renfield: No, no, master. I wasn't going to say anything, I told them nothing. I am loyal to you master.
Van Helsing: You'll die in torment if you die with innocent blood on your soul.
Renfield: God will not damn a poor lunatic's soul. He knows that the powers of evil are too great for those with weak minds.