Vincenzo 'hunchback' plans a robbery on a armored police van with his gang. Once the job is done, his gang try to kill him and absconds with the loot. Vincenzo hides in the sewers before looking up his friend Monezza who the police later interrogate for his involvement with vincenzo. Meanwhile, Vincenzo is getting revenge on his gang by killing them off one at the time in his various brutal ways.
Cast
Tomas Milian
Vincenzo Marazzi 'Il Gobbo' / Sergio Marazzi 'Er Monnezza'
Pino Colizzi
Commissario Sarti
Isa Danieli
Maria - prostitute
Mario Piave
Commissario Valenzi
Sal Borgese
Milo Dragovic 'Albanese'
Luciano Catenacci
Adalberto Maria Perrone
Solvi Stübing
Marika Engver - embassy clerk
Guido Leontini
Mario Di Gennaro - 'Sogliola'
Francesco D'Adda
The Bespectacled Psychiatrist
Fulvio Mingozzi
Commissioner Mingozzi
Carlo Gaddi
Faina' - Gobbos friend
Alessandra Cardini
Unknown
Livio Galassi
Giggi - Gobbo's friend
Pierangelo Civera
Agente Romeo Esposito
Nello Pazzafini
Carmine Ciacci
Franco Odoardi
The Chief Psychiatrist
Salvatore Billa
Hitman
Tom Felleghy
Questore
Alba Maiolini
Borgatara
Riccardo Petrazzi
Chauffeur
Rosario Borelli
Romolo
Anna Manduchi
Nightclub Customer (uncredited)
Quinto Gambi
Arrested Criminal (uncredited)
Fortunato Arena
Unknown
Pietro Innocenzi
Benito Giua (uncredited)
Alfredo Quadrelli
(uncredited)
Crew
Umberto Lenzi
Director, Screenplay, Story
Tomas Milian
Screenplay
Eugenio Alabiso
Editor
Amedeo Moriani
Assistant Editor
Federico Zanni
Director of Photography
Alessandro Metz
First Assistant Director
Luciano Martino
Producer
Pietro Innocenzi
Line Producer
Giuseppe Bassan
Production Design
Elio Polacchi
Camera Operator
Mario Pastorini
Assistant Camera
Silvio Laurenzi
Costume Design
Iolanda Angelucci
Hairstylist
Franco Di Girolamo
Makeup Artist
Bruno Moreal
Sound Mixer
Raffaele De Luca
Sound
Stefano Piermarioli
Boom Operator
Gino Vagniluca
Special Effects
Franco Micalizzi
Original Music Composer
Marcello Laurenti
Still Photographer
Maria Luisa Merci
Script Supervisor
Adriano Tiberi
Property Master
Giuseppe Gabrielli
Key Grip
Roberto Belli
Gaffer
Floriana Scalabrelli
Seamstress
Evi Farinelli
Unit Manager
Alexander Blonksteiner
Conductor
Alberto Paluzzi
Production Secretary
