Klaus Kinski
Dr. Francis Clay
Rosalba Neri
Anne Palmieri
Jane Garret
Mara
Margaret Lee
Cheryl Hume
John Karlsen
Professor Osterman
Gioia Desideri
Ruth
Giangiacomo Elia
The Gardener (as John Ely)
Monica Strebel
Nurse Helen
Fernando Cerulli
Chaffeur
Giulio Baraghini
Policeman
Sandro Rossi
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)
Fernando Di Leo
Director
Fernando Di Leo
Screenplay
Nino Latino
Screenplay
Fernando Di Leo
Story
Tiziano Longo
Producer
Nino Latino
Story
Silvano Spadaccino
Original Music Composer
Amedeo Giomini
Editor
Armando Novelli
Producer
Franco Villa
Director of Photography
Antonio Mura
Makeup Artist
Teresa Ferrone
Set Decoration
Armando Novelli
Production Manager
Nicola Tamburo
Set Decoration
Romano Pampaloni
Sound Recordist
Giacomo Simonelli
Conductor
Antonio de Castel Largo
Assistant Camera
Antonio Minutolo
Assistant Camera
Marcella Moretti
Wardrobe Designer
Alberto Longo
Production Supervisor
Claudio Morabito
Camera Operator
Franco Lo Cascio
Assistant Director
Francesco Vitulano
Unit Manager
Raffaele Benedetti
Sound Recordist