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Stephen Boyd as Leyton van Dyk |
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Ray Milland as Pete Handley |
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France Nuyen as Atanga |
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Cameron Mitchell as Bruno Carstens |
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Brendon Boone as Jim Handley |
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Michael Kirner as Mark Handley |
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John van Dreelen as Lee |
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John Stacy as Bill Stryker |
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George Wang as Wong |
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Marie du Toit as Lucie Handley |
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Ian Yule as Task Force Leader |
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Bill Brewer as Ship's Captain |
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Romano Puppo as Alberto |
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Larry McEvoy as Dr. Warden |
| Directing | Robert Day | Director |
| Sound | Francesco De Masi | Original Music Composer |
| Writing | Ralph Anders | Novel |
| Writing | Ralph Anders | Writer |
| Writing | Robert Day | Writer |
| Writing | Stanley Norman | Writer |
| Camera | Mario Fioretti | Director of Photography |
| Production | Stanley Norman | Producer |
| Production | Rudolph Andreas | Executive Producer |
| Editing | Frederick Wilson | Editor |
| Art | Basil Deny | Art Direction |