"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
Director
Screenplay
Keith Emerson
Original Music Composer
Claudio Argento
Producer
Salvatore Argento
Mario Bava
Thanks
Romano Albani
Director of Photography
Idelmo Simonelli
Camera Operator
Francesco Bellomo
Still Photographer
Alberto Altibrandi
Gaffer
Giuseppe Bassan
Art Direction
Francesco Cuppini
Set Decoration
Maurizio Garrone
Massimo Lentini
Costume Design
Germano Natali
Special Effects
Serena Canevari
Script Supervisor
Attilio Gizzi
Sound Effects Editor
Luciana Maria Costanzi
Hairstylist
Giancarlo De Leonardis
Pierantonio Mecacci
Makeup Artist
Gianlorenzo Battaglia
Underwater Camera
Second Unit Director
Franco Fraticelli
Editor
Franco Groppioni
Sound Engineer
Lamberto Bava
Assistant Director
Second Unit
Story
Godfrey Salmon
Orchestrator
Conductor
Music Arranger
Solly V. Bianco
Administration
Cesare Jacolucci
Unit Manager
Anna Maria Galvinelli
Production Assistant
Michela Prodan
Saverio Mangogna
Andrea Piazzesi
Second Assistant Director
Giancarlo Laurenzi
Boom Operator
Agostino Pascarella
Key Grip
Guglielmo Garroni
Executive Producer
Andrew W. Garroni
Production Manager
Luciano Anzellotti
Sound Effects
Massimo Anzellotti
Romano Pampaloni
Sound Mixer
Angelo Iacono
