| Person | Type | Job | Role(s) |
|---|---|---|---|
 Angelo Lotti | Crew | Camera | Director of Photography |
Bruno Moreal | Crew | Sound | Sound Mixer |
 Cornell Woolrich | Crew | Writing | Novel |
 Edgar Wallace | Crew | Writing | Story |
Eugenio Alabiso | Crew | Editing | Editor |
Giacomo Caló Carducci | Crew | Production | Production Designer |
Giulia Mafai | Crew | Costume & Make-Up | Costume Designer |
Guido Ortenzi | Crew | Sound | Sound Engineer |
Herbert Kerz | Crew | Production | Production Manager |
Lamberto Palmieri | Crew | Production | Producer, Production Coordinator |
Mario Sbrenna | Crew | Camera | Camera Operator |
 Renato Romano | Crew | Production | Producer |
 Riz Ortolani | Crew | Sound | Original Music Composer, Conductor |
Roberto Gianviti | Crew | Writing | Screenplay |
Sergio Borelli | Crew | Production | Production Manager |
Silvio Laurenzi | Crew | Costume & Make-Up | Costume Assistant |
 Umberto Lenzi | Crew | Writing | Screenplay, Director, Story |
Rosaria Cilento | Crew | Directing | Continuity |
Anna Graziosi | Crew | Costume & Make-Up | Hairstylist |
Renato Marinelli | Crew | Sound | Sound Effects |
Amedeo Moriani | Crew | Editing | Assistant Editor |
Sergio Angeloni | Crew | Costume & Make-Up | Makeup Artist |
Herbert Kerz | Crew | Production | Production Manager |
Asmi Nardó | Crew | Art | Other |
Paolo D'Orazio | Crew | Art | Other |
Fulvio Barresi | Crew | Directing | Assistant Director |
E. Pandolfini | Crew | Art | Other |
 Alba Maiolini | Cast | Actress | Asylum Patient with Doll (uncredited) |
 Aldo Barberito | Cast | Actor | Lt. Palumbo |
 Andrea Scotti | Cast | Actor | Conductor (uncredited) |
 Antonio Sabàto | Cast | Actor | Mario Gerosa |
Bill Vanders | Cast | Actor | Member of the Methodist Church (uncredited) |
 Bruno Corazzari | Cast | Actor | Barrett |
 Camille Keaton | Cast | Actress | Hippie Girl on Couch (uncredited) |
 Carla Mancini | Cast | Actress | Anna's Maid |
 Claudio Gora | Cast | Actor | Raffaele Ferri |
 Enzo Andronico | Cast | Actor | Hotel Manager |
 Ermelinda De Felice | Cast | Actress | The Doorkeeper (uncredited) |
 Franco Fantasia | Cast | Actor | Lt. Renzi |
 Fulvio Mingozzi | Cast | Actor | Agent |
 Fulvio Pellegrino | Cast | Actor | Policeman (uncredited) |
 Gabriella Giorgelli | Cast | Actress | Ines Tamburini - aka Toscana |
 Ivana Novak | Cast | Actress | Asylum Nurse (uncredited) |
Ivano Davoli | Cast | Actor | Palmieri |
 Lina Franchi | Cast | Actress | Prostitute (uncredited) |
 Linda Sini | Cast | Actress | Wanda |
 Maria Tedeschi | Cast | Actress | Asylum Patient (uncredited) |
 Marina Malfatti | Cast | Actress | Kathy Adams |
 Marisa Mell | Cast | Actress | Anna Sartori / Maria Sartori |
 Nello Pazzafini | Cast | Actor | Giovanni Rau |
 Nestore Cavaricci | Cast | Actor | Agent |
 Petra Schürmann | Cast | Actress | Concetta De Rosa |
 Pier Paolo Capponi | Cast | Actor | Inspector Vismara |
Renato Romano | Cast | Actor | The Priest |
 Rossella Falk | Cast | Actress | Elena Marchi |
 Tom Felleghy | Cast | Actor | Dr. Harris (uncredited) |
 Uschi Glas | Cast | Actress | Giulia Torresi |
 Vera Drudi | Cast | Actress | Asylum Patient (uncredited) |
Sandra Wolff | Cast | Secretary (uncredited) | |
 Lella Cattaneo | Cast | Actress | Woman with Hat at Art Exhibit (uncredited) |
 Alessandro Tedeschi | Cast | Actor | Man at Cemetery (uncredited) |
Filippo Del Bello | Cast | Parish priest (uncredited) | |
Armand Cava | Cast | Man (uncredited) | |
 Augusta Di Vincenzi | Cast | Actress | Woman at the airport (uncredited) |
| Person | Type | Job | Role(s) |
