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Robert Forster as Prof. Paul Corwin / The Clone |
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Adrienne Barbeau as Margaret Corwin |
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Ray Milland as Prof. Meredith |
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David Sheiner as Prof. Sidney Hillstrom |
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John Lehne as Lt. Merholz |
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Denise DuBarry as Ann Sweeney |
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Jack De Mave as Roger |
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Thomas Bellin as Ed Linnick |
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Heather Hobbs as Jenny |
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Eddie Quillan as Watchman |
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Raye Sheffield as Clone |
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Russell Shannon as Guard |
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James Nolan as Dr. Tapler |
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Madeleine Shaner as Audrey Linnick |
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Johnny Hock as 1st Skater |
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Tom Elliott as 2nd Skater |
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Thomas McGowan as Andrew Pauletta (uncredited) |
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John Herman Shaner as Fire Captain (uncredited) |
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D.A. Young as Lance (uncredited) |
| Directing | Gus Trikonis | Director |
| Writing | Al Ramrus | Writer |
| Costume & Make-Up | Webster C. Phillips | Makeup Artist |
| Costume & Make-Up | Christine George | Hairstylist |
| Production | Clyde Phillips | Associate Producer |
| Production | John Herman Shaner | Producer |
| Art | William Sandell | Art Direction |
| Production | Al Ramrus | Producer |
| Art | Carl Biddiscombe | Set Decoration |
| Writing | John Herman Shaner | Writer |
| Production | Bob Banner | Executive Producer |
| Camera | Donald M. Morgan | Director of Photography |
| Art | Bruce Bryant | Production Design |
| Sound | Paul Chihara | Original Music Composer |
| Production | Caro Jones | Casting |
| Art | James Castle | Production Design |
| Editing | Ann E. Mills | Editor |
