"A young man returns from Rome to his sister's satanic New York apartment house."
Leigh McCloskey
as Mark Elliot
Irene Miracle
as Rose Elliot
Eleonora Giorgi
as Sara
Daria Nicolodi
as Elise Stallone Van Adler
Sacha Pitoëff
as Kazanian
Alida Valli
as Carol
Veronica Lazăr
as Nurse
Gabriele Lavia
as Carlo
Feodor Chaliapin Jr.
as Professor Arnold / Dr. Varelli
Leopoldo Mastelloni
as John, the Butler
Ania Pieroni
as Musical Student
James Fleetwood
as Cook
Rosario Rigutini
as Man
Ryan Hilliard
as Shadow
Paolo Paoloni
as Music Teacher
Fulvio Mingozzi
as Cabdriver
Luigi Lodoli
as Bookbinder
Rodolfo Lodi
as Old Man
Dario Argento
as Narrator (voice) (uncredited)
Ettore Martini
as Burning Building Cop (uncredited)
Corinne Dunne
as Tenant in New York Building (uncredited)
Filippo Perego
Claudio Argento
Producer
Salvatore Argento
Screenplay
Keith Emerson
Original Music Composer
Director
Mario Bava
Thanks
Romano Albani
Director of Photography
Germano Natali
Special Effects
Giancarlo De Leonardis
Hairstylist
Idelmo Simonelli
Camera Operator
Maurizio Garrone
Set Decoration
Attilio Gizzi
Sound Effects Editor
Luciana Maria Costanzi
Massimo Lentini
Costume Design
Serena Canevari
Script Supervisor
Francesco Bellomo
Still Photographer
Francesco Cuppini
Alberto Altibrandi
Gaffer
Giuseppe Bassan
Art Direction
Pierantonio Mecacci
Makeup Artist
Gianlorenzo Battaglia
Underwater Camera
Second Unit Director
Lamberto Bava
Assistant Director
Franco Fraticelli
Editor
Second Unit
Franco Groppioni
Sound Engineer
Story
Godfrey Salmon
Orchestrator
Saverio Mangogna
Production Assistant
Music Arranger
Conductor
Cesare Jacolucci
Unit Manager
Michela Prodan
Agostino Pascarella
Key Grip
Solly V. Bianco
Administration
Anna Maria Galvinelli
Andrea Piazzesi
Second Assistant Director
Giancarlo Laurenzi
Boom Operator
Romano Pampaloni
Sound Mixer
Andrew W. Garroni
Production Manager
Guglielmo Garroni
Executive Producer
Luciano Anzellotti
Sound Effects
Massimo Anzellotti
Angelo Iacono
