Carlo Giordani
James Franciscus
Franco Arnò
Karl Malden
Dr. Esson
Tom Felleghy
Dr. Mombelli
Emilio Marchesini
Spimi's man
Fulvio Mingozzi
Morsella
Corrado Olmi
Barber
Pino Patti
Manuel's ex-lover
Umberto Raho
Prof. Manera
Jacques Stany
Taxi driver
Stefano Oppedisano
Telephone operator
Ada Pometti
Walter Pinelli
Anna Terzi
Catherine Spaak
Sascha Helwin
Film starlet
Marie Louise Sinclair
Martial Boschero
Lori
Cinzia De Carolis
Manuel
Werner Pochath
Prof. Fulvio Terzi
Tino Carraro
Billiard Player (uncredited)
Ettore Arena
Smoker in the Billiard Hall (uncredited)
Aristide Caporale
Chief of Police Salmi (uncredited)
Giovanni Di Benedetto
Lori's Babysitter (uncredited)
Margherita Horowitz
Police Supt. Spini
Pier Paolo Capponi
Man at Table in the Saint Peter's Club (uncredited)
Giuseppe Marrocco
Man in the Terzi's Institute (uncredited)
Gennarino Pappagalli
(uncredited)
Aldo Parenti
Policeman - Speaks with Morsella About Food (uncredited)
Franco Ukmar
Dr. Braun
Horst Frank
Bianca Merusi
Rada Rassimov
Dr. Casoni
Aldo Reggiani
Dr. Calabresi
Carlo Alighiero
Righetto (cameraman)
Vittorio Congia
Gigi the Loser
Ugo Fangareggi
Story
Dardano Sacchetti
Editor
Franco Fraticelli
Conductor
Bruno Nicolai
Original Music Composer
Ennio Morricone
Luigi Cozzi
Director
Dario Argento
Screenplay
Visual Effects
Luciano Vittori
Producer
Salvatore Argento
Director of Photography
Erico Menczer
Production Accountant
Carlo Du Bois
Assistant Makeup Artist
Vincenzo Marchetti
Hairstylist
Maura Turchi
Sound
Mario Ronchetti
Production Design
Carlo Leva
First Assistant Editor
Cesarina Casini
Assistant Director
Roberto Pariante
Grip
Giovanni Migalizzi
Camera Operator
Roberto Brega
Key Grip
Maurizio Migalizzi
Assistant Editor
Sergio Fraticelli
Bryan Edgar Wallace
Assistant Set Decoration
Romeo Costantini
Sound Effects Editor
Massimo Anzellotti
Electrician
Francesco Rachini
Title Designer
Production Manager
Angelo Iacono
Costume Design
Sound Recordist
Romano Pampaloni
Production Secretary
Roberta Leoni
Assistant Production Design
Franco Pedacchia
Boom Operator
Eugenio Fiori
Gaffer
Rodolfo Flibotti
Carlo Vinciguerra
Best Boy Electric
Alberico Loreti
Giuseppe Gabrielli
Second Assistant Camera
Maurizio La Monica
Administration
First Assistant Camera
Renato Mascagno
Still Photographer
Firmino Palmieri
Makeup Artist
Giuseppe Ferranti
Arturo de Castelterlango
Ettore Migalizzi
Luca Sabatelli
Pierantonio Mecacci
Property Master
Lamberto Verdenelli
Roberto Bertozzi
Sound Effects
Luciano Anzellotti
Giuseppe Mangogna