Michael York

Robert Dominici

Edwige Fenech

Hélène Martell

Donald Pleasence

Inspector Datti

Mapi Galán

Susanna

Fabio Sartor

Davide

Renato Cortesi

Agent Marchi

Antonella Ponziani

Gloria Datti

Carola Stagnaro

Dr. Carla Pesenti

Daniele Brado

Dr. Vanni

Caterina Boratto

Robert's Mother

Lewis E. Ciannelli

Chief Physician

Renata Dal Pozzo

Agent Corsi

Giovanni Lombardo Radice

Father Giuliano

Gianni Franco

Inspector

Marino Masé

Aging Expert

Achille Brugnini

Giovanni Tamberi

Andrea

Loris Loddi

Danzil, a Cop

Hal Yamanouchi

Swordmaster

Diego Verdegiglio

Raffaella Baracchi

Laura, Venice Prostitute

Emy Valentino

Daniela Merlo

Mother (uncredited)

Raf Baldassarre

Man in Police Line-Up (uncredited)

Rossana Canghiari

Party Guest (uncredited)

Lella Cattaneo

Woman at Robert's Piano Concert (uncredited)

Ruggero Deodato

Man That Gets on Moped at Station (uncredited)

Giuseppe Marrocco

Man at Robert's Piano Concert (uncredited)

Benito Stefanelli

Man in Restroom (uncredited)