James Franciscus

Carlo Giordani

Karl Malden

Franco Arnò

Catherine Spaak

Anna Terzi

Pier Paolo Capponi

Police Supt. Spini

Horst Frank

Dr. Braun

Rada Rassimov

Bianca Merusi

Aldo Reggiani

Dr. Casoni

Carlo Alighiero

Dr. Calabresi

Vittorio Congia

Righetto (cameraman)

Ugo Fangareggi

Gigi the Loser

Tom Felleghy

Dr. Esson

Emilio Marchesini

Dr. Mombelli

Fulvio Mingozzi

Spimi's man

Corrado Olmi

Morsella

Pino Patti

Barber

Umberto Raho

Manuel's ex-lover

Jacques Stany

Prof. Manera

Stefano Oppedisano

Taxi driver

Ada Pometti

Telephone operator

Walter Pinelli

Sascha Helwin

Marie Louise Sinclair

Film starlet

Martial Boschero

Cinzia De Carolis

Lori

Werner Pochath

Manuel

Tino Carraro

Prof. Fulvio Terzi

Ettore Arena

Billiard Player (uncredited)

Aristide Caporale

Smoker in the Billiard Hall (uncredited)

Giovanni Di Benedetto

Chief of Police Salmi (uncredited)

Margherita Horowitz

Lori's Babysitter (uncredited)

Giuseppe Marrocco

Man at Table in the Saint Peter's Club (uncredited)

Gennarino Pappagalli

Man in the Terzi's Institute (uncredited)

Aldo Parenti

(uncredited)

Franco Ukmar

Policeman - Speaks with Morsella About Food (uncredited)

Dardano Sacchetti

Story

Dario Argento

Director

Dario Argento

Story

Dario Argento

Screenplay

Luciano Vittori

Visual Effects

Salvatore Argento

Producer

Erico Menczer

Director of Photography

Ennio Morricone

Original Music Composer

Carlo Du Bois

Production Accountant

Vincenzo Marchetti

Assistant Makeup Artist

Maura Turchi

Hairstylist

Mario Ronchetti

Sound

Luigi Cozzi

Story

Carlo Leva

Production Design

Cesarina Casini

First Assistant Editor

Roberto Pariante

Assistant Director

Giovanni Migalizzi

Grip

Roberto Brega

Camera Operator

Maurizio Migalizzi

Key Grip

Sergio Fraticelli

Assistant Editor

Bryan Edgar Wallace

Screenplay

Romeo Costantini

Assistant Set Decoration

Massimo Anzellotti

Sound Effects Editor

Francesco Rachini

Electrician

Luciano Vittori

Title Designer

Angelo Iacono

Production Manager

Carlo Leva

Costume Design

Romano Pampaloni

Sound Recordist

Bruno Nicolai

Conductor

Roberta Leoni

Production Secretary

Franco Pedacchia

Assistant Production Design

Eugenio Fiori

Boom Operator

Rodolfo Flibotti

Gaffer

Carlo Vinciguerra

Electrician

Alberico Loreti

Best Boy Electric

Giuseppe Gabrielli

Grip

Maurizio La Monica

Second Assistant Camera

Carlo Du Bois

Administration

Renato Mascagno

First Assistant Camera

Firmino Palmieri

Still Photographer

Giuseppe Ferranti

Makeup Artist

Arturo de Castelterlango

First Assistant Camera

Ettore Migalizzi

Grip

Luca Sabatelli

Costume Design

Pierantonio Mecacci

Makeup Artist

Lamberto Verdenelli

Property Master

Roberto Bertozzi

Electrician

Luciano Anzellotti

Sound Effects

Franco Fraticelli

Editor

Giuseppe Mangogna

Production Manager