 | Paul Birch als Allan Kelley |
 | Lorna Thayer als Carol Kelley |
 | Dona Cole als Sandra Kelley |
 | Dick Sargent als Deputy Larry Brewster |
| Leonard Tarver als Him |
 | Chester Conklin als Ben Webber |
| Bruce Whitmore als The Beast (voice) |
 | London als Duke, the Dog (uncredited) |
| Tom Filer | Screenplay |
| David Kramarsky | Director |
| Roger Corman | Executive Producer |
| David Kramarsky | Producer |
| Roger Corman | Director |
| Jack Killifer | Editor |
| Everett Baker | Director of Photography |
| Paul Blaisdell | Creature Design |
| Albert S. Ruddy | Art Direction |
| Charles Hannawalt | Associate Producer |
| Jonathan Haze | Production Manager |
| Donald Myers | Assistant Director |
| Paul Blaisdell | Special Effects |
| Igor Stravinsky | Music |
| Sergei Prokofiev | Music |
| Dmitri Shostakovich | Music |
| Charles P. Eisenmann | Animal Coordinator |
