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Anthony Geary as Dr. Jim Cole |
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Marc Singer as Brad Mueller |
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Micah Grant as Ray Bettencamp |
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Chuck Connors as Stan Brown |
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Vaughn Armstrong as Paul Bettencamp / Alien |
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Deborah Anne Mansy as Kathleen |
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Lori Birdsong as Terri Scarborough |
| Costume & Make-Up | Melanie Hughes | Makeup Artist |
| Directing | Phil Cook | First Assistant Director |
| Production | Jon Epstein | Executive Producer |
| Production | Barry Greenfield | Supervising Producer |
| Camera | Michel Hugo | Director of Photography |
| Production | T.S. Cook | Co-Executive Producer |
| Production | G. Warren Smith | Line Producer |
| Art | Roger Holzberg | Production Design |
| Production | G. Warren Smith | Unit Production Manager |
| Costume & Make-Up | Mary Lampert | Hairstylist |
| Editing | David Byron Lloyd | Editor |
| Sound | Dana Kaproff | Original Music Composer |
| Production | Milt Hamerman | Casting |
| Art | Jamie Archer | Construction Coordinator |
| Camera | John Koester | Camera Operator |
| Sound | Bayard Carey | Sound Mixer |
| Crew | Steve Faggard | Special Effects Assistant |
| Crew | Arlen Johnson | Special Effects Assistant |
| Camera | Harland Espeset | Grip |
| Crew | Ed Vega | Scenic Artist |
| Production | Laura Hoffman | Production Coordinator |
| Sound | John Stacy | Supervising Sound Editor |
| Editing | Jim Rosenthal | Assistant Editor |
| Sound | Michael Becker | Boom Operator |
| Art | Stacy Hagen | Set Dresser |
| Art | John A. Keim | Property Master |
| Crew | Jack Faggard | Special Effects |
| Lighting | Paul Cuffee | Electrician |
| Costume & Make-Up | Lynette Bernay | Wardrobe Supervisor |
| Camera | Ken Johnston | Key Grip |
| Sound | Donald Woods | Supervising Music Editor |
| Art | Joanie Montoya | Set Dresser |
| Lighting | Ralph McCarthy | Gaffer |
| Production | Sally Jackson | Casting |
| Directing | Harry Falk | Director |
| Writing | T.S. Cook | Teleplay |
| Writing | Darnell Fry | Story |
| Writing | Mike Marvin | Story |
