Two couples vacationing together in an R.V. from Texas to Colorado are terrorized after they witness a murder during a Satanic ritual.
| Directing | Jack Starrett | Director |
| Writing | Lee Frost | Screenplay |
| Writing | Wes Bishop | Screenplay |
| Production | Wes Bishop | Producer |
| Production | Paul Maslansky | Executive Producer |
| Sound | Leonard Rosenman | Original Music Composer |
| Camera | Robert C. Jessup | Director of Photography |
| Editing | John F. Link | Editor |
| Production | Tony Wade | Production Supervisor |
| Editing | Allan Jacobs | Supervising Film Editor |
| Production | Frederic W. Brost | Unit Production Manager |
| Directing | Frederic W. Brost | Assistant Director |
| Directing | Stephen Lim | Second Assistant Director |
| Editing | Michael Cipriano | Assistant Editor |
| Sound | William Randall | Production Sound Mixer |
| Sound | Don J. Bassman | Sound Re-Recording Mixer |
| Directing | Joyce King | Script Supervisor |
| Art | Mark Wade | Property Master |
| Costume & Make-Up | Nancy McArdle | Wardrobe Master |
| Costume & Make-Up | Dorothy J. Pearl | Makeup Artist |
| Lighting | Ross A. Maehl | Gaffer |
| Crew | Paul Nuckles | Stunt Coordinator |
| Camera | George Bouillet | Camera Operator |
| Crew | Richard O. Helmer | Special Effects |
