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Richard Crenna as C.J. Arnold |
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Joanna Pettet as Dr. Caroline Arnold |
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Andrew Prine as Prof. Raymond Guy |
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Cassie Yates as Mary Harper |
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George O'Hanlon, Jr. as Pete Brooks |
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Lynne Moody as Felicia Allen |
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Mary Louise Weller as Laurie Belman |
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Robert Viharo as Dwight |
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Victor Buono as The Devil |
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Milton Selzer as The Realtor |
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Ed Bakey as Sam the Caretaker |
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Galen Thompson as Emilio Vargas |
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Emory Souza as The Demon |
| Directing | Gus Trikonis | Director |
| Writing | David Sheldon | Screenstory |
| Costume & Make-Up | Barbara Andrews | Wardrobe Coordinator |
| Sound | Gordon Davidson | Sound Effects Editor |
| Directing | Scott U. Adam | First Assistant Director |
| Crew | Buddy Joe Hooker | Stunts |
| Production | David Sheldon | Co-Producer |
| Directing | Dan Steinbrocker | Second Assistant Director |
| Sound | Robert R. Rutledge | Sound Effects Editor |
| Costume & Make-Up | James Alvarez | Wardrobe Assistant |
| Sound | John Fresco | Music Supervisor |
| Art | Michael Bennett | Property Master |
| Directing | Elizabeth Gallagher | Script Supervisor |
| Sound | Earl Sampson | Boom Operator |
| Production | Harry Caplan | Production Manager |
| Sound | William B. Kaplan | Sound Mixer |
| Costume & Make-Up | Jack H. Young | Prosthetic Makeup Artist |
| Sound | Jerry Cohen | Music Editor |
| Sound | Johnny Harris | Original Music Composer |
| Editing | Jack Kirschner | Editor |
| Art | Peter Jamison | Art Direction |
| Production | Malcolm Levinthal | Executive Producer |
| Camera | Mario DiLeo | Director of Photography |
| Writing | Gus Trikonis | Screenplay |
| Writing | Galen Thompson | Screenplay |
| Production | Paul Joseph | Executive Producer |
| Costume & Make-Up | Lynne Brooks | Makeup Artist |
| Production | Roger Corman | Executive Producer |
| Art | Robert W. Sheets | Set Decoration |
| Production | Ed Carlin | Producer |
