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Christopher George as Hagen Arnold |
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Greta Baldwin as Karen Summers |
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Henry Jones as Dr. Crowther |
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Monte Markham as Gregory Gallea |
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Harold Gould as Col. Holt |
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Phillip Pine as Lee Craig |
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Lee Delano as Dr. Tony Verity |
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Ivan Bonar as Col. Cowen |
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Patrick Wright as Stover |
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Keye Luke as Sen Chiu |
| Directing | William Castle | Director |
| Crew | Kenny Endoso | Stunts |
| Writing | Leslie P. Davies | Novel |
| Production | Dona Holloway | Associate Producer |
| Camera | Harold E. Stine | Director of Photography |
| Writing | Edmund Morris | Writer |
| Production | William Castle | Producer |
| Sound | Van Cleave | Original Music Composer |
| Editing | Edwin H. Bryant | Editor |
| Art | Hal Pereira | Art Direction |
| Art | Walter H. Tyler | Art Direction |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Costume & Make-Up | Nellie Manley | Hair Supervisor |
| Costume & Make-Up | Shirlee Strahm | Costumer |
