An occult investigator buys the 150-year-old skull of the Marquis de Sade, which turns out to be possessed by evil spirits.
| Directing | Freddie Francis | Director |
| Writing | Robert Bloch | Story |
| Writing | Milton Subotsky | Screenplay |
| Production | Max Rosenberg | Producer |
| Production | Milton Subotsky | Producer |
| Sound | Elisabeth Lutyens | Original Music Composer |
| Camera | John Wilcox | Director of Photography |
| Editing | Oswald Hafenrichter | Editor |
| Art | Bill Constable | Art Direction |
| Art | Scott Slimon | Set Decoration |
| Costume & Make-Up | Jill Carpenter | Makeup Artist |
| Costume & Make-Up | Henry Montsash | Hairdresser |
| Production | Ted Lloyd | Production Manager |
| Crew | Ted Samuels | Special Effects |
| Sound | Philip Martell | Conductor |
| Art | Kenneth Ryan | Assistant Art Director |
| Sound | Buster Ambler | Sound Recordist |
| Sound | John Cox | Sound Supervisor |
| Sound | Tom Priestley | Sound Editor |
| Costume & Make-Up | Jackie Cummins | Wardrobe Supervisor |
