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Don Megowan as Capt. Kenneth Cragis |
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Erica Elliott as Maxine Megan |
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Don Doolittle as Dr. Raven |
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George Milan as Acto |
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Dudley Manlove as Lagan |
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Frances McCann as Esme Cragis Milos |
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David Cross as Pax |
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Malcolm Smith as Court |
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Richard Vath as Mark |
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Reid Hammond as Hart |
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Pat Bradley as Dr. Moffitt (uncredited) |
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William Hunter as Ward (uncredited) |
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Gil Frye as Orus (uncredited) |
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Alton Tabor as Kelly (uncredited) |
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Paul Sheriff as Police Officer (uncredited) |
| Directing | Wesley Barry | Director |
| Production | Wesley Barry | Producer |
| Camera | Hal Mohr | Director of Photography |
| Art | Ted Rich | Art Direction |
| Editing | Ace Herman | Editor |
| Writing | Jack Williamson | Novel |
| Writing | Jay Simms | Story |
| Writing | Jay Simms | Screenplay |
| Production | Edward J. Kay | Producer |
| Sound | Edward J. Kay | Original Music Composer |
| Art | Morris Hoffman | Set Decoration |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
| Writing | Karel Čapek | Original Story |
