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James Craig as Russ Bradford |
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Gloria Talbott as Susan Winter |
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Lon Chaney Jr. as Martin 'Marty' Melville |
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Tom Drake as Lee Brand |
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Duncan 'Dean' Parkin as The Cyclops |
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Vicente Padula as The Governor |
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Marlene Kloss as The Salesgirl |
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Manuel López as The Policeman |
| Directing | Bert I. Gordon | Director |
| Writing | Bert I. Gordon | Writer |
| Costume & Make-Up | Jack H. Young | Special Effects Makeup Artist |
| Production | Flora M. Gordon | Producer's Assistant |
| Production | Bert I. Gordon | Producer |
| Crew | Bert I. Gordon | Special Effects |
| Production | Henry Schrage | Associate Producer |
| Sound | Albert Glasser | Original Music Composer |
| Camera | Ira H. Morgan | Director of Photography |
| Editing | Carlo Lodato | Editor |
| Costume & Make-Up | Carlie Taylor | Makeup Artist |
| Production | Henry Schrage | Production Manager |
| Directing | Harry L. Fraser | Assistant Director |
| Directing | Ray Taylor Jr. | Assistant Director |
