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Richard Basehart as Dr Douglas Pruitt |
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Susan Strasberg as Heather Kessler |
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Peter Sumner as Dixie Hart |
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Joseph Fürst as Franz Kessler |
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Tony Wager as Inspector Bigelow |
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Shariff Medan as postman |
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Leslie Nielsen as Jack Gallagher |
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Alwyn Kurts as Dr. Mitchell |
| Sound | Laurie Lewis | Music |
| Writing | Mende Brown | Writer |
| Production | Charles B. Walnizer | Executive Producer |
| Directing | Leslie H. Martinson | Director |
| Production | Mende Brown | Producer |
| Production | John Daniell | Associate Producer |
| Camera | Paul Onorato | Director of Photography |
| Editing | Richard Hindley | Editor |
| Writing | Michael Fisher | Writer |
