Umberto Lenzi Director Tomas Milian Vincenzo Marazzi 'Il Gobbo' , Sergio Marazzi 'Er Monnezza' Actor, Writer Pino Colizzi Commissario Sarti Actor Solvi Stubing Marika Engver - embassy clerk Actor Mario Piave Commissario Valenzi Actor Isa Danieli Maria - prostitute Actor Nello Pazzafini Carmine Ciacci Actor Rosario Borelli Romolo - Gobbo's friend Actor Valentino Macchi Brigadiere Actor Sal Borgese Milo Dragovic 'Albanese' Actor Carlo Gaddi Faina' - Gobbos friend Actor Lucky Aras Male Nurse Actor Luciano Catenacci Adalberto Maria Perrone Actor Fulvio Mingozzi Commissioner Mingozzi Actor Guido Leontini Mario Di Gennaro - 'Sogliola' Actor Livio Galassi Giggi - Gobbo's friend Actor