The Cat o' Nine Tails

Carlo Giordani

James Franciscus

Franco Arnò

Karl Malden

Anna Terzi

Catherine Spaak

Police Supt. Spini

Pier Paolo Capponi

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

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

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

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