 | Peter Breck als Johnny Barrett |
 | Constance Towers als Cathy |
 | Gene Evans als Boden |
 | James Best als Stuart |
 | Hari Rhodes als Trent |
 | Larry Tucker als Pagliacci |
 | Paul Dubov als Dr. Menkin |
 | Chuck Roberson als Wilkes |
 | Neyle Morrow als Psycho |
 | John Matthews als Dr. Cristo |
 | Bill Zuckert als Swanee |
| John Craig als Lloyd |
 | Philip Ahn als Dr. Fong |
 | Frank Gerstle als Police Lieutenant |
| Rachel Romen |
| Barbara Perry |
| Marlene Manners |
| Linda Randolph |
| Lucille Curtis |
| Jeanette Dana |
 | Marie Devereux |
| Karen Conrad |
| Allison Daniell |
 | Chuck Hicks |
 | Wally Campo |
| Ray Baxter |
| Linda Barrett |
| Harry Fleer |
| Samuel Fuller | Director |
| Samuel Fuller | Producer |
| Sam Firks | Executive Producer |
| Leon Fromkess | Executive Producer |
| Stanley Cortez | Director of Photography |
| Jerome Thoms | Editor |
| Eugène Lourié | Art Direction |
| Paul Dunlap | Original Music Composer |
| Mary Chaffee | Script Supervisor |
| Gordon Zahler | Music Supervisor |
| Charles Duncan | Special Effects |
| Linwood G. Dunn | Visual Effects |
| Charles S. Thompson | Set Decoration |
| Rudolph C. Flothow | Production Manager |
| Floyd Joyer | Assistant Director |
| Herbert G. Luft | Producer's Assistant |
| Dan Greenway | Makeup Supervisor |
| Einar Bourman | Costumer |
| Philip Mitchell | Sound Recordist |
| Jon Gregory | Choreographer |
| Ray Mercer Jr. | Title Designer |
| Gordon Zahler | Sound Effects |
| Jack Lowry | Music Editor |
| Josef von Stroheim | Sound Effects Editor |
| Samuel Fuller | Screenplay |
