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Dennis Cole as Ranger Gene Pearson |
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Susan Sullivan as Senator Kate Lassiter |
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Leslie Nielsen as Joe Johnson |
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Ray Milland as Prof. Harrison Soames |
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Julie Sommars as Liz Johnson |
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Sheila Larken as Ann Soames |
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Lonny Chapman as Walt Charles |
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James Olson as Tom Arlen |
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Ivan Bonar as Doctor at Prison |
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David Westberg as Larry Munson |
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Todd Martin as Herb |
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Joseph Della Sorte as Cooper |
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William Bryant as Jack Miller |
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Michael Masters as Ray |
| Production | Irwin Allen | Producer |
| Sound | Richard LaSalle | Original Music Composer |
| Camera | John M. Nickolaus Jr. | Director of Photography |
| Editing | Dick Wormell | Editor |
| Production | Jack Baur | Casting |
| Art | Duane Alt | Art Direction |
| Art | James Hassinger | Set Decoration |
| Costume & Make-Up | Paul Zastupnevich | Costume Design |
| Costume & Make-Up | Dan Greenway | Makeup Artist |
| Costume & Make-Up | Dorothea Long | Hairstylist |
| Crew | Paul Nuckles | Stunt Coordinator |
| Sound | Donald Harris | Music Editor |
| Crew | Ted Koerner | Special Effects |
| Writing | Norman Katkov | Writer |
| Directing | Georg Fenady | Director |
