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Richard Todd as Inspector Harry Sanders |
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Marianne Koch as Dr. Inge Jung |
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Albert Lieven as Dr. Franz Weiss |
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Walter Rilla as Dr. Schneider |
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Jeremy Lloyd as Tom Hamilton |
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Robert Arden as Jim Hunter |
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Vivi Bach as Marlene |
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Simon Sabela as Bosambo |
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Bill Brewer as Jack Pearson |
| Directing | Lawrence Huntington | Director |
| Writing | Harry Alan Towers | Writer |
| Writing | Lawrence Huntington | Writer |
| Sound | Sidney Torch | Music |
| Writing | Kevin Kavanagh | Writer |
| Writing | Nicolas Roeg | Writer |
| Production | Harry Alan Towers | Producer |
| Crew | Robert Huke | Cinematography |
| Editing | Allan Morrison | Editor |
| Writing | Edgar Wallace | Novel |
