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Strother Martin as Dr. Carl Stoner |
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Dirk Benedict as David Blake |
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Heather Menzies as Kristina Stoner |
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Richard B. Shull as Dr. Ken Daniels |
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Tim O'Connor as Kogen |
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Jack Ging as Sheriff Dale Hardison |
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Reb Brown as Steve Randall |
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Ted Grossman as Deputy Morgan Bock |
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Kathleen King as Kitty Stewart |
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Charles Seel as Old Man |
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Ray Ballard as Waggish Tourist |
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Felix Silla as Sam Lee, the Seal Boy |
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Noble Craig as Tim McGraw, the Snake Man |
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Bobbi Kiger as Kootch Dancer |
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J.R. Clark as Station Attendant |
| Writing | Hal Dresner | Screenplay |
| Writing | Daniel C. Striepeke | Story |
| Production | David Brown | Executive Producer |
| Sound | Patrick Williams | Original Music Composer |
| Camera | Gerald Perry Finnerman | Director of Photography |
| Production | Daniel C. Striepeke | Producer |
| Production | Richard D. Zanuck | Executive Producer |
| Production | Robert Butner | Associate Producer |
| Art | John T. McCormack | Art Direction |
| Directing | Bernard L. Kowalski | Director |
| Editing | Robert Watts | Editor |
| Costume & Make-Up | John Chambers | Special Effects Makeup Artist |
| Costume & Make-Up | Nick Marcellino | Special Effects Makeup Artist |