While dabbling in Satanism, Count Karstein resurrects Mircalla Karnstein who initiates him into vampirism. As a rash of deaths afflicts the village, Gustav the head of Puritan group leads his men to seek out and destroy the pestilence. One of his twin nieces has become inflicted with the witchcraft but Gustav's zeal and venom has trapped the innocent Maria, threatening her with a tortuous execution, whilst Frieda remains free to continue her orgy of evil.
Unfortunately the movie Twins of Evil is not yet available on Disney Plus.
| Directing | John Hough | Director |
| Production | Harry Fine | Producer |
| Production | Michael Style | Producer |
| Writing | Tudor Gates | Screenplay |
| Camera | Dick Bush | Director of Photography |
| Writing | Sheridan Le Fanu | Characters |
| Sound | Harry Robertson | Original Music Composer |
| Editing | Spencer Reeve | Editor |
| Art | Dragoljub Ivkov | Production Design |
| Art | Roy Stannard | Art Direction |
| Crew | Ron Barron | Sound Recordist |
| Camera | Dudley Lovell | Camera Operator |
| Sound | Philip Martell | Music Supervisor |
| Costume & Make-Up | Pearl Tipaldi | Hairstylist |
| Costume & Make-Up | George Blackler | Makeup Artist |
| Costume & Make-Up | John Webber | Makeup Artist |
