Klaus Kinski
Dr. Francis Clay
Rosalba Neri
Anne Palmieri
John Karlsen
Professor Osterman
Giangiacomo Elia
The Gardener (as John Ely)
Monica Strebel
Nurse Helen
Giulio Baraghini
Policeman
Antonio Radaelli
Policeman
Franco Marletta
Male Nurse
Piero Nistri
Cheryl's Husband
Daniela Di Bitonto
Patient
Enzo Spitaleri
Ruth's Husband
Gilberto Galimberti
Policeman
Lina Franchi
Nurse Killed with Scythe (uncredited)