Tomas Milian

as Vincenzo Marazzi 'Il Gobbo' / Sergio Marazzi 'Er Monnezza'

Pino Colizzi

as Commissario Sarti

Isa Danieli

as Maria - prostitute

Mario Piave

as Commissario Valenzi

Sal Borgese

as Milo Dragovic 'Albanese'

Luciano Catenacci

as Adalberto Maria Perrone

Solvi Stübing

as Marika Engver - embassy clerk

Guido Leontini

as Mario Di Gennaro - 'Sogliola'

Francesco D'Adda

as The Bespectacled Psychiatrist

Fulvio Mingozzi

as Commissioner Mingozzi

Carlo Gaddi

as Faina' - Gobbos friend

Alessandra Cardini

Livio Galassi

as Giggi - Gobbo's friend

Pierangelo Civera

as Agente Romeo Esposito

Nello Pazzafini

as Carmine Ciacci

Franco Odoardi

as The Chief Psychiatrist

Salvatore Billa

as Hitman

Tom Felleghy

as Questore

Alba Maiolini

as Borgatara

Riccardo Petrazzi

as Chauffeur

Rosario Borelli

as Romolo

Anna Manduchi

as Nightclub Customer (uncredited)

Quinto Gambi

as Arrested Criminal (uncredited)

Fortunato Arena

Pietro Innocenzi

as Benito Giua (uncredited)

Alfredo Quadrelli

as (uncredited)