O Gato de Nove Caudas

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