| Jesse Vint | ... | Mike Colby | |
| Dawn Dunlap | ... | Tracy Baxter | |
| June Chadwick | ... | Dr. Barbara Glaser | |
| Linden Chiles | ... | Dr. Gordon Hauser | |
| Fox Harris | ... | Dr. Cal Timbergen | |
| Raymond Oliver | ... | Brian Beale | |
| Scott Paulin | ... | Earl Richards | |
| Michael Bowen | ... | Jimmy Swift | |
| Don Olivera | ... | SAM-104 | |
| rest of cast listed alphabetically: | |||
| Victor Warren | ... | Mutant (uncredited) | |
Directed by | |||
| Allan Holzman | |||
Writing credits | ||
| Tim Curnen | (screenplay) | |
| Jim Wynorski | (story) and | |
| R.J. Robertson | (story) | |
Produced by | |||
| Roger Corman | .... | producer | |
| Mary Ann Fisher | .... | co-producer | |
Original Music by | |||
| Susan Justin | |||
Cinematography by | |||
| Tim Suhrstedt | |||
Film Editing by | |||
| Allan Holzman | |||
| Martin Nicholson | |||
Casting by | |||
| Jackie McNamara | |||
Production Design by | |||
| Christopher Horner | |||
Art Direction by | |||
| Joseph T. Garrity | (as Joe Garrity) | ||
| Wayne Springfield | |||
Set Decoration by | |||
| Chuck Seaton | |||
Makeup Department | |||
| John Carl Buechler | .... | special makeup effects (as J.C. Buechler) | |
| Sue Dolph | .... | makeup artist | |
| Susan Moray | .... | hair stylist | |
| Steve Neill | .... | prosthetic fabricator | |
| Don Olivera | .... | special makeup effects | |
| Jim Shaw | .... | prosthetic designer | |
| R. Christopher Biggs | .... | special makeup effects artist (uncredited) | |
| Bart Mixon | .... | special makeup effects artist (uncredited) | |
| Mark Shostrom | .... | special makeup effects artist (uncredited) | |
Second Unit Director or Assistant Director | |||
| Mark Allan | .... | first assistant director | |
| Aaron Lipstadt | .... | second unit director | |
| Victoria Plummer | .... | second assistant director (as Vicki Plummer) | |
Art Department | |||
| Whitney Scott Bain | .... | carpenter | |
| Julie Kaye Fanton | .... | props (as Julie Towery) | |
| Jim Haddon | .... | special props and graphics | |
| Donna Marburger | .... | special props and graphics | |
| James Reigle | .... | set construction supervisor (as Jim Reigle) | |
| Ron Siegle | .... | special props and graphics | |
| Mark Pritchard | .... | carpenter (uncredited) | |
| Mark A. Shelton | .... | art department electrician (uncredited) | |
Sound Department | |||
| John K. Adams | .... | sound editor | |
| Patrushkha Mierzwa | .... | boom operator | |
| Branda S. Miller | .... | sound editor (as Branda Miller) | |
| Mark Ulano | .... | production sound mixer | |
| Karen G. Wilson | .... | supervising sound editor (as Karen Wilson) | |
Special Effects by | |||
| Roger George | .... | pyrotechnics | |
| Michael F. Hoover | .... | special mechanics | |
| Michael Lavalley | .... | special mechanics (as Mike La Valley) | |
| Rick Lazzarini | .... | special mechanics | |
Visual Effects by | |||
| Steve Caldwell | .... | camera operator: special visual effects | |
| Tom Campbell | .... | supervisor: special visual effects | |
| Brian Chin | .... | storyboard artist: special visual effects | |
| William T. Conway | .... | supervisor: special visual effects (as Bill Conway) | |
| Deborah Gaydos | .... | effects animation designer | |
| Julia Gibson | .... | effects animation camera | |
| Matthew McAllister | .... | special lighting effects | |
| January Nordman | .... | assistant animator (as January R. Nordman) | |
| Kyle Perkins | .... | model builder | |
| Tony Randel | .... | optical effects consultant (as Anthony Randel) | |
| Jay Roth | .... | model builder | |
| Brent Scrivener | .... | model shop supervisor (as Brent Scrivner) | |
| Hank Simon | .... | optical camera | |
| Dennis Skotak | .... | director of photography: special visual effects | |
| Robert Skotak | .... | production designer: special visual effects | |
| Joseph Yanuzzi | .... | effects editor | |
Camera and Electrical Department | |||
| James L. Carter | .... | director of photography: second unit (as James Carter) | |
| M.J. Elliott | .... | still photographer | |
| Greg Gardiner | .... | best boy | |
| James J. Gilson | .... | gaffer (as Jim Gilson) | |
| Jim Grce | .... | electrician | |
| Scott Guthrie | .... | electrician | |
| Martin J. Layton | .... | assistant camera (as Marty Layton) | |
| Tracy Neftzger | .... | key grip | |
| David W. Nims | .... | grip (as Dave Nims) | |
Costume and Wardrobe Department | |||
| Susie DeSanto | .... | wardrobe supervisor | |
| Mary Jane McCarty | .... | costume designer: women's jumpsuits (as Janice McCarthy) | |
Editorial Department | |||
| James Matheny | .... | associate editor (as Jim Matheny) | |
| Marilyn McCoppen | .... | assistant editor | |
| Martin Nicholson | .... | associate editor (as Marty Nicholson) | |
| Mark Pritchard | .... | apprentice editor | |
Music Department | |||
| Craig Huxley | .... | electronic music realization (as Craig Huntley) | |
Other crew | |||
| Rupert Harvey | .... | production accountant | |
| Pat Morrill | .... | production coordinator | |
| Judith Saunders | .... | script supervisor (as Judy Saunders) | |
| Mike Chambers | .... | production assistant/meat wrangler (uncredited) | |
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| Nowhere | Cheerleader Camp | Class of Nuke 'Em High | Saturn 3 | Horror Planet |
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| Full cast and crew | Company credits | External reviews |
| News articles | IMDb Horror section | IMDb USA section |
Perhaps the cheesiest, bloodiest Sci-Fi movie you'll ever see, this is pure entertainment from start to finish. Plenty of the obligatory 80's gore on display, a few quite sick moments & lots of amateurish acting...how can you go wrong!?! If you're a sci-fi horror fan this will be right up your street. Just don't expect 'Alien', OK?