 | Mabel Karr als Irma Zimmer |
 | Estella Blain als Nadja / Miss Muerte |
 | Fernando Montes als Dr. Phillippe Brighthouse |
 | Howard Vernon als Dr. Vicas |
 | Guy Mairesse als Hans Bergen |
 | Antonio Jiménez Escribano als Dr. Zimmer |
 | Marcelo Arroita-Jáuregui als Dr. Moroni |
 | Cris Huerta als Dr. Kallman |
 | Jesús Franco als Inspector Tanner |
 | Daniel White als Inspector Green |
| Alberto Bourbón als Policeman |
 | Francisco Camoiras als Fisherman (uncredited) |
| Mer Casas als Mrs. Moroni (uncredited) |
 | Ana Castor als Juliana (uncredited) |
 | Rafael Hernández als Assistant to Inspector Green (uncredited) |
 | José María Prada als Policeman (uncredited) |
 | Lucía Prado als Barbara Albert (uncredited) |
 | Javier de Rivera als Notary (uncredited) |
 | Vicente Roca als Police Doctor (uncredited) |
| Ángela Tamayo als Girl at the Nightclub (uncredited) |
| Jesús Franco | Director |
| Jean-Claude Carrière | Screenplay |
| Jesús Franco | Screenplay |
| Alejandro Ulloa | Director of Photography |
| Daniel White | Original Music Composer |
| Henri Baum | Line Producer |
| Michel Safra | Producer |
| Serge Silberman | Producer |
| Daniel White | Music |
| Marie-Louise Barberot | Editor |
| Jean Feyte | Editor |
| Antonio Cortés | Production Design |
| Antonio Cortés | Set Decoration |
| Raymond Ferrer | Key Makeup Artist |
| Éric Geiger | Production Manager |
| Robert Demollière | Assistant Director |
| Éric Geiger | Property Master |
| Louis Hochet | Sound Engineer |
| Clemente Manzano | Camera Operator |
| Arlette Lalande | Assistant Editor |
| Monique Teisseire | Assistant Editor |
| Nicole Guettard | Script Supervisor |
| Odette Darrigol | Production Secretary |
