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Joe Morrison as Dr. John Hoyt |
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Valerie Hawkins as Karen Richardson |
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John Vella as Egon |
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Jack Nagle as Dr. Richardson |
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Sandy Lee Kane as Louise |
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Deanna Lund as Jessica |
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Lois Etelman as Donna |
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Blanche Devereaux as Susan |
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Doug Hobart as Egon (monster) |
| Directing | William Grefé | Director |
| Writing | William Kerwin | Screenplay |
| Sound | Claude Pounds | Sound Recordist |
| Crew | Doug Hobart | Stunts |
| Editing | Julio C. Chávez | Editor |
| Camera | Julio C. Chávez | Director of Photography |
| Camera | Julio Roldan | Director of Photography |
| Crew | Thelma Sherr | Choreographer |
| Crew | Gary Holtz | Choreographer |
| Directing | Doris Bernhardt | Script Supervisor |
| Writing | Ben Lithman | Script Consultant |
| Directing | Anita Metzger | Script Coordinator |
| Costume & Make-Up | Harry Kerwin | Special Effects Makeup Artist |
| Production | Hank Rifkin | Associate Producer |
| Production | Joseph Fink | Producer |
| Production | Richard S. Flink | Producer |
| Production | Juan Hidalgo-Gato | Producer |
| Sound | Neil Sedaka | Songs |
