 | Edwige Fenech als Jane Harrison |
 | George Hilton als Richard Steele |
 | Ivan Rassimov als Mark Cogan |
 | Nieves Navarro als Barbara Harrison |
 | Julián Ugarte als J.P. McBain |
 | George Rigaud als Dr. Burton |
 | Maria Cumani Quasimodo als Elderly Neighbor |
 | Marina Malfatti als Mary Weil |
 | Luciano Pigozzi als Francis Clay |
 | Dominique Boschero als Woman Killed in Dream |
 | Lisa Leonardi als Girl with Dog |
 | Tom Felleghy als Inspector Smith |
 | Vera Drudi als Nightmare Woman |
 | Sergio Martino als Journalist / Policeman (uncredited) |
 | George Oliver als Cult Member (uncredited) |
| Sergio Martino | Director |
| Bruno Nicolai | Original Music Composer |
| Ernesto Gastaldi | Screenplay |
| Sauro Scavolini | Screenplay |
| Mino Loy | Producer |
| Luciano Martino | Producer |
| Santiago Moncada | Story |
| Miguel Fernández Mila | Director of Photography |
| Giancarlo Ferrando | Director of Photography |
| Eugenio Alabiso | Editor |
| José Luis Galicia | Art Direction |
| Jaime Pérez Cubero | Art Direction |
| Silvio Laurenzi | Costume Design |
| Giulia Mafai | Costume Design |
| Giuseppe Ferranti | Makeup Artist |
| Fabio Diotallevi | Production Manager |
| Franco Fogagnolo | Production Manager |
| Florian Trenker | Production Manager |
| Vittorio Caronia | Assistant Director |
| Francisco Rodríguez | Assistant Director |
| Giorgio Bertolini | Set Designer |
| Ricardo Sanz | Executive Producer |
| Bruno Zanoli | Sound Engineer |
| Bruno Moreal | Sound Mixer |
