An occult criminologist investigates a businessman who dabbles in the black arts while trying to survive against a powerful demon and an evil cult.
Clive Donner | Director |
John Cameron | Original Music Composer |
Gene Roddenberry | Executive Producer |
Gene Roddenberry | Screenplay |
Albert Witherick | Art Direction |
Danny Steinmann | Associate Producer |
Peter Tanner | Editor |
Gene Roddenberry | Story |
Gordon Scott | Producer |
Samuel A. Peeples | Screenplay |