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