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Frederic Forrest as Eugene Scott |
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Kathleen Lloyd as Jody Scott |
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John P. Ryan as Frank Davis |
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John Marley as Mr. Mallory |
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Eddie Constantine as Dr. Forrest |
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Andrew Duggan as Dr. Perry |
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James Dixon as Detective Perkins |
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Dennis O'Flaherty as Dr. Peters |
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Jill Gatsby as Cindy |
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Bobby Ramsen as Dr. Santo De Silva |
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Glenda Young as Lydia |
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Lynn Wood as Jody's Mother |
| Crew | Greg Cannom | Makeup Effects |
| Production | Larry Cohen | Producer |
| Crew | Rick Baker | Makeup Effects |
| Directing | Larry Cohen | Director |
| Writing | Larry Cohen | Writer |
| Production | William Wellman Jr. | Producer |
| Writing | Larry Cohen | Characters |
| Editing | Louis G. Friedman | Editor |
| Sound | Bernard Herrmann | Original Music Composer |
| Editing | Carol Oblath | Editor |
| Camera | Fenton Hamilton | Director of Photography |
| Editing | Curtis Burch | Editor |
| Costume & Make-Up | Rick Baker | Makeup Artist |
| Directing | Reid Freeman | Assistant Director |
