 | James Farentino als Sheriff Dan Gillis |
 | Melody Anderson als Janet Gillis |
 | Jack Albertson als William G. Dobbs |
 | Dennis Redfield als Ron |
 | Nancy Locke als Linda |
 | Lisa Blount als Girl on the Beach / Nurse Lisa |
 | Robert Englund als Harry |
| Bill Quinn als Ernie |
 | Michael Currie als Herman |
 | Christopher Allport als George Le Moyne / Freddie |
 | Joseph G. Medalis als Doctor |
 | Macon McCalman als Ben |
| Lisa Marie als Hitchhiker |
| Estelle Omens als Betty |
 | Barry Corbin als Phil |
| Linda Shusett als Waitress |
| Ed Bakey als Fisherman |
 | Glenn Morshower als Jimmy |
| Robert Boler als Mr. Haskell |
 | Michael Pataki als Sam |
| Jill Fosse als Nurse |
| Mark Courtney als Jamie |
| Michael Courtney als Jamie |
| Renee McDonell als Girl #1 |
| Dottie Catching als Lady Car Passenger |
| Colby Smith als Femal Stranger |
| Judy Ashton als Joyce |
| Anthony Cecere als Townsperson (uncredited) |
| Bill Couch Jr. als Townsperson (uncredited) |
| Bill Couch als Townsperson (uncredited) |
| Angelo De Meo als Townsperson (uncredited) |
| Gary Sherman | Director |
| Ronald Shusett | Screenplay |
| Dan O'Bannon | Screenplay |
| Jeff Millar | Story |
| Alex Stern | Story |
| Robert Fentress | Producer |
| Ronald Shusett | Producer |
| Richard R. St. Johns | Executive Producer |
| Alan Balsam | Editor |
| Joe Aubel | Art Direction |
| William Sandell | Art Direction |
| Dennis Barton | Set Decoration |
| Cloudia Rebar | Set Decoration |
| Jan Cook | Hairstylist |
| Zoltan Elek | Makeup Artist |
| Edouard F. Henriques | Makeup Artist |
| Vincent Prentice | Makeup Artist |
| Ziggy Geike | Wigmaker |
| Lee B. Drygas | Leadman |
| Airick Kredell | Leadman |
| James E. Tocci | Set Designer |
| Jay M. Hirsch | Construction Foreman |
| Robert L. Harman | Sound Re-Recording Mixer |
| William L. McCaughey | Sound Re-Recording Mixer |
| Howard S. Wollman | Sound Re-Recording Mixer |
| Bill Couch | Stunt Coordinator |
| Ronald Batzdorff | Gaffer |
| John Koester | Camera Operator |
| Elliott Marks | Still Photographer |
| Erica Edell Phillips | Costume Supervisor |
| Jack K. Tillar | Music Editor |
| Alvin Greenman | Script Supervisor |
| Kimberley Coy | Unit Publicist |
| Edwin D. Rich | Production Accountant |
| Steven Poster | Director of Photography |
| Joe Renzetti | Original Music Composer |
| Chelsea Quinn Yarbro | Novel |
| Michael I. Rachmil | Associate Producer |
| Linda Francis | Casting |
| William P. Owens | Unit Production Manager |
| Dixie J. Capp | Production Coordinator |
| Brian E. Frankish | First Assistant Director |
| Stan Winston | Makeup Effects Designer |
| John Rettino | Assistant Property Master |
| Dominick Bruno | Property Master |
| Gerald Perdew | Propmaker |
| Richard D. Rogers | ADR Mixer |
| Charles Randall | Boom Operator |
| Lettie Odney | Dialogue Editor |
| William Randall | Sound Mixer |
| Vito Carenzo | Best Boy Grip |
| James Dyer | Dolly Grip |
| Roger Gebhard | First Assistant Camera |
| Ken Miller | Key Grip |
| Jeff Goldenberg | Second Assistant Camera |
| Nancy Forner | Assistant Editor |
| Ross Albert | Associate Editor |
| Donah Bassett | Negative Cutter |
| John W. Hyde | Executive In Charge Of Production |
| Andrew A. Ackerman | Second Assistant Director |
| Scott Thaler | Second Assistant Director |
| Amanda J. Flick | Scenic Artist |
| Gordon Ecker | Sound Effects Editor |
| Tony McVann | Sound Re-Recording Mixer |
| Anthony Milch | Sound Editor |
| James Kagel | Sculptor |
| James Cummins | Special Effects Technician |
| Bill Hansard | Visual Effects Coordinator |
| Anthony Cecere | Stunts |
| Bill Couch Jr. | Stunts |
| Bill Couch | Stunts |
| Chuck Couch | Stunts |
| Angelo De Meo | Stunts |
| Toni Lemos | Location Coordinator |
| Murray McFadden | Scoring Mixer |
| Fred Hendley | Transportation Co-Captain |
| Wayne Nelson | Transportation Captain |
| Donna Smith | Transportation Co-Captain |
| Dustin Bernard | Production Assistant |
| Kate Morris | Administration |
| Ty Nutt | Dialogue Coach |
| Anna St. Johns | Production Executive |
| William Randall | Boom Operator |
