Klaus Kinski
Dr. Francis Clay
Margaret Lee
Cheryl Hume
Rosalba Neri
Anne Palmieri
Jane Garret
Mara
John Karlsen
Professor Osterman
Gioia Desideri
Ruth
Giangiacomo Elia
The Gardener (as John Ely)
Monica Strebel
Nurse Helen
Fernando Cerulli
Chaffeur
Sandro Rossi
Policeman
Giulio Baraghini
Policeman
Ettore Geri
Inspector
Antonio Radaelli
Policeman
Carla Mancini
Nurse
Franco Marletta
Male Nurse
Piero Nistri
Cheryl's Husband
Daniela Di Bitonto
Patient
Enzo Spitaleri
Ruth's Husband
Marco Mariani
Male Nurse
Gilberto Galimberti
Policeman
Rosanna Braida
Patient
Lina Franchi
Nurse Killed with Scythe (uncredited)
Crew
Fernando Di Leo
Director
Fernando Di Leo
Screenplay
Nino Latino
Screenplay
Armando Novelli
Producer
Franco Villa
Director of Photography
Silvano Spadaccino
Original Music Composer
Tiziano Longo
Producer
Antonio Mura
Makeup Artist
Armando Novelli
Production Manager
Fernando Di Leo
Story
Teresa Ferrone
Set Decoration
Nino Latino
Story
Nicola Tamburo
Set Decoration
Amedeo Giomini
Editor
Raffaele Benedetti
Sound Recordist
Romano Pampaloni
Sound Recordist
Giacomo Simonelli
Conductor
Francesco Vitulano
Unit Manager
Marcella Moretti
Wardrobe Designer
Franco Lo Cascio
Assistant Director
Antonio Minutolo
Assistant Camera
Antonio de Castel Largo
Assistant Camera
Claudio Morabito
Camera Operator
Alberto Longo
Production Supervisor