Burt Lancaster
Professor
Helmut Berger
Konrad Huebel
Silvana Mangano
Bianca Brumonti
Claudia Marsani
Lietta Brumonti
Stefano Patrizi
Stefano
Elvira Cortese
Erminia
Philippe Hersent
Porter
Guy Tréjan
Antique Dealer
Jean-Pierre Zola
Blanchard
Umberto Raho
Police Sergeant Bernai
Enzo Fiermonte
Police Commissioner
Romolo Valli
Michelli
George Clatot
Valentino Macchi
Vittorio Fanfoni
Lorenzo Piani
Margherita Horowitz
Maid
Claudia Cardinale
Professor's Wife (uncredited)
Dominique Sanda
Professor's Mother (uncredited)