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Diane Franklin as Suzy Putterman |
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Gerrit Graham as Stanley Putterman |
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Mary Woronov as Raquel Putterman |
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Chad Allen as Sherman Putterman |
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Jon Gries as O.D. |
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Bert Remsen as Grampa Putterman |
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Alejandro Rey as Spiro |
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Randi Brooks as Cherry |
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Jennifer Richards as Medusa |
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Sonny Carl Davis as Norton |
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Ian Patrick Williams as Nutky |
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William Paulson as Pluthar |
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John Leamer as Chauffeur |
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Gregory Moffett as Archive Footage (Robot Monster) |
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Jack Mylong-Münz as Archive Footage (Robot Monster) |
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Selena Royle as Archive Footage (Robot Monster) |
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Frank Welker as The Monster |
| Camera | Romano Albani | Director of Photography |
| Crew | Desiree Vaughn-Soto | Special Effects |
| Editing | Thomas Meshelski | Supervising Film Editor |
| Writing | Ted Nicolaou | Writer |
| Art | Giovanni Natalucci | Production Design |
| Crew | Cleve Hall | Special Effects |
| Production | Charles Band | Executive Producer |
| Production | Roberto Bessi | Production Manager |
| Crew | Andrew Doucette | Title Graphics |
| Production | Debra Dion | Producer |
| Production | Albert Band | Producer |
| Directing | Ted Nicolaou | Director |
| Crew | Brent Armstrong | Special Effects |
| Crew | Michelle Oggeri | Special Effects |
| Crew | John Carl Buechler | Special Effects |
| Costume & Make-Up | Tim Turner | Co-Costume Designer |
| Production | Giancarlo J. Sini | Production Accountant |
| Production | Stefano Spadoni | Unit Production Manager |
| Sound | Vanessa Theme Ament | Foley |
| Crew | Michael Deak | Special Effects |
| Sound | Tom Villano | Music Editor |
| Production | Andrea Borella | Producer |
| Sound | Tom Gerard | Sound Re-Recording Mixer |
| Crew | John Vulich | Special Effects |
| Crew | R. Christopher Biggs | Makeup Effects |
| Crew | Juliet Avola | Post-Production Manager |
| Editing | Claudia Hoover | Editor |
| Crew | Robert Kurtzman | Special Effects |
| Costume & Make-Up | Kathie Clark | Costume Supervisor |
| Crew | Margherita Regina | Special Effects |
| Sound | Don Perry | Music Supervisor |
| Sound | Richard Band | Music Supervisor |
| Sound | Christopher L. Stone | Orchestrator |
| Sound | Richard Band | Original Music Composer |
