Val McKee and Earl Bassett are in a fight for their lives when they discover that their desolate town has been infested with gigantic, man-eating creatures that live below the ground.
| Writing | S.S. Wilson | Screenplay |
| Editing | O. Nicholas Brown | Editor |
| Production | S.S. Wilson | Producer |
| Directing | Ron Underwood | Director |
| Writing | Brent Maddock | Screenplay |
| Production | Gale Anne Hurd | Executive Producer |
| Production | Brent Maddock | Producer |
| Camera | Alexander Gruszynski | Director of Photography |
| Sound | Ernest Troost | Original Music Composer |
| Directing | Susan Bierbaum | Script Supervisor |
| Sound | Stephen Hunter Flick | Supervising Sound Editor |
| Sound | Kevin O'Connell | Sound Re-Recording Mixer |
| Sound | Richard L. Anderson | Supervising Sound Editor |
| Sound | Greg P. Russell | Sound Re-Recording Mixer |
| Sound | Kathy Durning | Music Editor |
| Camera | Peter Iovino | Still Photographer |
| Editing | Derek Berlatsky | First Assistant Editor |
| Editing | Karen Sharp Lancaster | First Assistant Editor |
| Sound | Walt Martin | Production Sound Mixer |
| Sound | Jeffrey J. Haboush | Sound Re-Recording Mixer |
| Costume & Make-Up | Abigail Murray | Costume Design |
| Art | Don Maskovich | Art Direction |
| Art | Debra Combs | Set Decoration |
| Art | Ivo Cristante | Production Design |
| Sound | Ralph Sall | Music Supervisor |
| Sound | Patricia Carlin | Music Editor |
| Production | Ellen Collett | Associate Producer |
| Production | Ginny Nugent | Line Producer |
| Writing | S.S. Wilson | Story |
| Writing | Brent Maddock | Story |
| Writing | Ron Underwood | Story |
| Production | Pam Dixon | Casting |
| Costume & Make-Up | Annette E. Fabrizi | Hairstylist |
| Costume & Make-Up | Annette E. Fabrizi | Makeup Artist |
| Costume & Make-Up | Carla M. Fabrizi | Makeup Artist |
| Costume & Make-Up | Carla M. Fabrizi | Hairstylist |
| Production | Lisa C. Cook | Production Manager |
| Crew | Nick Benson | Special Effects |
| Crew | Ken Tarallo | Special Effects |
| Visual Effects | Tom Woodruff Jr. | Creature Design |
| Visual Effects | Alec Gillis | Creature Design |
| Directing | Mike Topoozian | First Assistant Director |
| Directing | Joe Camp III | Second Assistant Director |
| Art | Ruth Honegger | Assistant Set Decoration |
| Crew | Gary Jensen | Stunt Coordinator |
| Directing | S.S. Wilson | Second Unit Director |
| Crew | Tracy Keehn-Dashnaw | Stunts |
| Crew | Jeff Imada | Stunts |
| Crew | Lance Gilbert | Stunts |
| Art | Mike Malone | Set Dresser |
| Crew | Glory Fioramonti | Stunts |
| Crew | John Casino | Stunts |
