James Franciscus

Carlo Giordani

Acting

Karl Malden

Franco Arnò

Acting

Catherine Spaak

Anna Terzi

Acting

Pier Paolo Capponi

Police Supt. Spini

Acting

Horst Frank

Dr. Braun

Acting

Rada Rassimov

Bianca Merusi

Acting

Aldo Reggiani

Dr. Casoni

Acting

Carlo Alighiero

Dr. Calabresi

Acting

Vittorio Congia

Righetto (cameraman)

Acting

Ugo Fangareggi

Gigi the Loser

Acting

Tom Felleghy

Dr. Esson

Acting

Emilio Marchesini

Dr. Mombelli

Acting

Fulvio Mingozzi

Spimi's man

Acting

Corrado Olmi

Morsella

Acting

Pino Patti

Barber

Acting

Umberto Raho

Manuel's ex-lover

Acting

Jacques Stany

Prof. Manera

Acting

Stefano Oppedisano

Taxi driver

Acting

Ada Pometti

Telephone operator

Acting

Walter Pinelli

Acting

Sascha Helwin

Acting

Marie Louise Sinclair

Film starlet

Acting

Martial Boschero

Acting

Cinzia De Carolis

Lori

Acting

Werner Pochath

Manuel

Acting

Tino Carraro

Prof. Fulvio Terzi

Acting

Ettore Arena

Billiard Player (uncredited)

Acting

Aristide Caporale

Smoker in the Billiard Hall (uncredited)

Acting

Giovanni Di Benedetto

Chief of Police Salmi (uncredited)

Acting

Margherita Horowitz

Lori's Babysitter (uncredited)

Acting

Giuseppe Marrocco

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

Acting

Gennarino Pappagalli

Man in the Terzi's Institute (uncredited)

Acting

Aldo Parenti

(uncredited)

Acting

Franco Ukmar

Policeman - Speaks with Morsella About Food (uncredited)

Acting