Klaus Kinski
Dr. Francis Clay
Acting
Rosalba Neri
Anne Palmieri
Acting
Jane Garret
Mara
Acting
Margaret Lee
Cheryl Hume
Acting
John Karlsen
Professor Osterman
Acting
Gioia Desideri
Ruth
Acting
Giangiacomo Elia
The Gardener (as John Ely)
Acting
Monica Strebel
Nurse Helen
Acting
Fernando Cerulli
Chaffeur
Acting
Giulio Baraghini
Policeman
Acting
Sandro Rossi
Policeman
Sound
Ettore Geri
Inspector
Acting
Antonio Radaelli
Policeman
Acting
Carla Mancini
Nurse
Acting
Franco Marletta
Male Nurse
Acting
Piero Nistri
Cheryl's Husband
Acting
Daniela Di Bitonto
Patient
Acting
Enzo Spitaleri
Ruth's Husband
Acting
Marco Mariani
Male Nurse
Acting
Gilberto Galimberti
Policeman
Acting
Rosanna Braida
Patient
Acting
Lina Franchi
Nurse Killed with Scythe (uncredited)
Acting