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Howard Duff as Dave Pomeroy |
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Linda Cristal as Dr. Paula Stevens |
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Stephen McNally as James Kincade |
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Nehemiah Persoff as August Best |
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Anne Jeffreys as Myra Pryor |
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Oscar Beregi Jr as Dr. Paul Cerbo |
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Gregory Morton as Steadman |
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Dennis Hopper as Goff |
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George Barrows as Ernest |
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John Hoyt as Dr. Milton Becker |
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Steve Franken as Hal Johnson |
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Mike Farrell as Dick Blaine |
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Stanley Clements as Albert |
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Rush Williams as Reporter |
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Eilene Janssen as Information Clerk |
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Wesley Lau as Lt. Brady |
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George Sawaya as Karl Sinden (Mr. X) |
| Directing | Eddie Davis | Director |
| Writing | Charles E. Savage | Writer |
| Production | Earle Lyon | Producer |
