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Tommy Kirk as Mike |
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Johnny Crawford as Horsey |
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Beau Bridges as Fred |
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Joy Harmon as Merrie |
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Robert Random as Rick |
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Gail Gilmore as Elsa |
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Tisha Sterling as Jean |
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Tim Rooney as Pete |
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Kevin O'Neal as Harry |
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Charla Doherty as Nancy |
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Toni Basil as Red |
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Ron Howard as Genius |
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Joe Turkel as Sheriff |
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Rance Howard as Deputy |
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Freddy Cannon as Self |
| Sound | Jack Nitzsche | Original Music Composer |
| Writing | H. G. Wells | Novel |
| Directing | Bert I. Gordon | Director |
| Art | Franz Bachelin | Art Direction |
| Production | Bert I. Gordon | Producer |
| Writing | Bert I. Gordon | Screenstory |
| Writing | Alan Caillou | Screenplay |
| Camera | Paul Vogel | Director of Photography |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Visual Effects | Bert I. Gordon | Visual Effects |
| Crew | Herman E. Townsley | Special Effects |
| Art | Robert R. Benton | Set Decoration |
| Editing | John A. Bushelman | Editor |
| Visual Effects | Flora M. Gordon | Visual Effects |
| Sound | John R. Carter | Sound Recordist |
