Twins of Evil (1971)
Twins of Evil (1971) is Tudor Gates' third and final screenplay of the Karnstein Trilogy for Hammer Films. Taking place long before Lust for a Vampire and The Vampire Lovers, Twins of Evil offers an origin story of the haunted, Satan worshiping Karnsteins. Instead of concentrating on supernatural creatures seeking to destroy families and corrupt their children, Twins of Evil points a finger at the men who use those stories for their own advantage. Unlike the earlier films, the lesbian vampires are practically nonexistent. Lacking the bared breasts and passionate kisses of the earlier films, the audience witnesses scene after scene of conscienceless destruction caused by the two men in the center of the story