 | Tarah Nutter als Sandy |
 | Christopher S. Nelson als Greg |
 | Jack Palance als Joe Taylor |
 | Martin Landau als Fred 'Sarge' Dobbs |
 | Sue Ane Langdon als Aggie |
 | Neville Brand als Leo |
 | Cameron Mitchell als Hunter |
 | Darby Hinton als Randy |
 | David Caruso als Tom |
 | Kevin Peter Hall als The Alien |
 | Lynn Theel als Beth |
 | Larry Storch als Scoutmaster |
 | Ralph Meeker als Dave |
| Mark Ness als Bill, pool shooter |
| Burt Davis als Old Man At Bar |
| Jeffrey Sudzin als Ambulance Driver |
| Greydon Clark | Director |
| Steven R. Mathis | Writer |
| Lyn Freeman | Writer |
| Daniel Grodnik | Writer |
| Joe Quinlivan | Special Effects |
| Jack De Wolf | Production Design |
| Alistair Mitchell | Makeup Artist |
| Curtis Burch | Editor |
| Skip Steloff | Executive Producer |
| Bennett Tramer | Writer |
| Greydon Clark | Producer |
| Paul Kimatian | Executive Producer |
| Greg Cannom | Makeup Effects |
| Dan Wyman | Original Music Composer |
| Dean Cundey | Director of Photography |
| Daniel Grodunk | Co-Producer |
| Earl Watson | Sound Editor |
| Jefferson Richard | Production Manager |
| Milton Spencer | Associate Producer |
| Jack Buehler | Wardrobe Supervisor |
| Lyn Freeman | Co-Producer |
| Robert Dietz | Sound |
| Curtis Burch | Associate Producer |
| Haywood Perkins | Property Master |
| Elois Jenssen | Costume Design |
| Caren Singer | First Assistant Director |
| Jeffrey Sudzin | Second Assistant Director |
| Clyde E. Bryan | First Assistant Camera |
| Thomas Vanghele | Second Assistant Camera |
| Brenda Weisman | Script Supervisor |
| Jean Clark | Boom Operator |
| Woody Perkins | Props |
| Scott Buttfield | Gaffer |
| Howard Herrington | Assistant Gaffer |
| Dylan Shephard | Key Grip |
| Mike Connors | Grip |
| Matia Karrell | Electrician |
| Brenda Haverstock | Electrician |
| Hedy Dietz | Still Photographer |
| L. Steven Snyder | Production Accountant |
| Julia Evershade | Assistant Editor |
