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Walter Koenig as Col. Jason Grant |
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Bruce Campbell as Ray Tanner |
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Robert Kurcz as Koreman |
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Leigh Lombardi as Mera |
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Tom Case as Beck |
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Judy Levitt as Intrepid Commander |
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Reavis Graham as Haskell |
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Reuben Yabuku as Intrepid Pilot |
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Doug Childs as Grant's Son |
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Mariafae Mytnyk as Research Assistant |
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John J. Saunders as Barnes |
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James A. Courtney as Lieutenant |
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B.K. Taylor as Additional Voices (voice) |
| Directing | Robert Dyke | Director |
| Writing | Tex Ragsdale | Screenplay |
| Production | Robert Dyke | Producer |
| Camera | Peter Klein | Director of Photography |
| Editing | Steven C. Craig | Editor |
| Editing | Kevin Tent | Editor |
| Art | B.K. Taylor | Production Design |
| Art | Larry Fox | Art Direction |
| Art | Peter M. Gurski | Art Direction |
| Art | Michele Poulik | Set Decoration |
| Costume & Make-Up | Deborah K. Larsen | Costume Design |
| Costume & Make-Up | Gary Cooney | Hairstylist |
| Sound | Jeffrey M. Jones | Sound Effects Editor |
| Sound | Sheldon J. Nueman | Sound Engineer |
| Camera | Ted Lindsey | Camera Operator |
| Camera | Dan Danilowicz | Still Photographer |
| Lighting | Donnie Allen | Gaffer |
| Directing | Rebecca Poulos | Script Supervisor |
| Crew | Gary Jones | Special Effects |
| Sound | Joseph LoDuca | Original Music Composer |
