"A masked killer stalks an institution for mentally disturbed rich women."
Klaus Kinski
as Dr. Francis Clay
Rosalba Neri
as Anne Palmieri
Jane Garret
as Mara
Margaret Lee
as Cheryl Hume
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
Giulio Baraghini
as Policeman
Sandro Rossi
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
Story
Tiziano Longo
Producer
Silvano Spadaccino
Original Music Composer
Amedeo Giomini
Editor
Armando Novelli
Franco Villa
Director of Photography
Antonio Mura
Makeup Artist
Teresa Ferrone
Set Decoration
Production Manager
Nicola Tamburo
Romano Pampaloni
Sound Recordist
Giacomo Simonelli
Conductor
Antonio de Castel Largo
Assistant Camera
Antonio Minutolo
Marcella Moretti
Wardrobe Designer
Alberto Longo
Production Supervisor
Claudio Morabito
Camera Operator
Franco Lo Cascio
Assistant Director
Francesco Vitulano
Unit Manager
Raffaele Benedetti
