 | Maria De Aragon als Jeanne |
 | Marvin Howard als Dr. Iane Thorne |
 | Eric Sinclair als Dr. Willy Seppel (as Eric Allison) |
 | Mason Caulfield als Mason, the Hippy |
| R.N. Bullard |
| Cecil Reddick als Medical Examiner |
| Tim Frawley |
| Jax Jason Carroll |
| Ola Kauffman als Mrs. Lacey |
 | John Barnum als Merv (as Barney Bossick) |
| Al Ward als Phil Masters |
| Chuck Hillig |
| James Ragan als Ben |
| David Essex |
| Harry Essex | Director |
| Julian C. May | Short Story |
| Harry Essex | Producer |
| Doug Beswick | Visual Effects |
| Ron Kinney | Makeup Artist |
| Robert Caramico | Director of Photography |
| Robert Freeman | Editor |
| Harry Essex | Screenplay |
| Albert Glasser | Original Music Composer |
| Jax Jason Carroll | Associate Producer |
| Roger Corman | Producer |
