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Preston Foster as Dr. Erik von Steiner |
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Philip Carey as Dr. Steve Connors |
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Merry Anders as Carol White |
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John Hoyt as Dr. Varno |
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Dennis Patrick as Councilman Willard |
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Joan Woodbury as Gadra |
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Steve Franken as Danny McKee, the Electrician |
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Berry Kroeger as Preston |
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J. Edward McKinley as Raymond |
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Delores Wells as Reena |
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Gloria Leslie as Councilwoman |
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Molly Glessing as Android |
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Peter Strudwick as The Mutant |
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Margaret Seldeen as Miss Hollister |
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Forrest J. Ackerman as Square-Frame Technician |
| Costume & Make-Up | Marc Snegoff | Makeup Artist |
| Sound | Richard LaSalle | Original Music Composer |
| Production | Bill Redlin | Producer |
| Art | Ray Storey | Art Direction |
| Directing | Ib Melchior | Director |
| Writing | Ib Melchior | Screenplay |
| Camera | Vilmos Zsigmond | Director of Photography |
| Writing | David L. Hewitt | Story |
| Writing | Ib Melchior | Story |
| Production | Don Levy | Associate Producer |
| Directing | Hannah Scheel | Script Supervisor |
