 | Gian Maria Volonté als Dottore |
 | Florinda Bolkan als Augusta Terzi |
 | Gianni Santuccio als Police Prefect |
 | Orazio Orlando als Biglia |
 | Sergio Tramonti als Antonio Pace |
 | Arturo Dominici als Mangani |
| Aldo Rendine als Nicola Panunzio |
 | Massimo Foschi als Augusta's Husband |
 | Aleka Paizi als Governess |
 | Vittorio Duse als Canes |
 | Pino Patti als Wiretapping Dep. Head |
 | Salvo Randone als Plumber |
| Fulvio Grimaldi als Patanè |
 | Giuseppe Aguinaldo Nicastro |
| Filippo De Gara |
| Ugo Adinolfi |
| Franco Marletta |
| Giacomo Bellini |
 | Giuseppe Terranova |
| Vincenzo Falanga |
 | Roberto Bonanni |
| Guido Buzzelli |
| Gino Usai |
 | Calogero Azzaretto als Man Listening the Speech of Dottore (uncredited) |
 | Gianfranco Barra als Interrogation Officer (uncredited) |
 | Aristide Caporale als Man at Police Headquarters (uncredited) |
 | Ettore Geri als Officer Attending the Final Confession (uncredited) |
 | Alfonso Giganti als Policeman (uncredited) |
| Franco Magno als Officer Attending the Final Confession (uncredited) |
 | Enrico Marciani als Officer Attending the Final Confession (uncredited) |
| Enzo Mondino als Officer Attending the Final Confession (uncredited) |
 | Mario Pascucci als Policeman (uncredited) |
 | Fulvio Pellegrino als Policeman Listening the Speech of Dottore (uncredited) |
 | Elio Petri als Policeman Sleeping During Dottore's Address (uncredited) |
| Mario Silvestri als Officer Attending the Final Confession (uncredited) |
 | Alessandro Tedeschi als Man Listening to Speech (uncredited) |
| Armando Tortorici als Arrested Contestant (uncredited) |
 | Romano Moraschini als Policeman (uncredited) |
 | Ugo Ballester als Officer Attending the Final Confession (uncredited) |
| Elio Petri | Director |
| Ruggero Mastroianni | Editor |
| Luigi Kuveiller | Director of Photography |
| Daniele Senatore | Producer |
| Marina Cicogna | Producer |
| Rosa Luciani | Hair Designer |
| Ennio Morricone | Original Music Composer |
| Elio Petri | Screenplay |
| Ugo Pirro | Screenplay |
| Angela Sammaciccia | Costume Designer |
| Ubaldo Terzano | Camera Operator |
| Antonio Annunziata | Assistant Camera |
| Romano Cardarelli | Production Director |
| Bruno Nicolai | Music Director |
| Carlo Egidi | Production Design |
| Sergio Emidi | Key Grip |
| Sergio Coletta | Gaffer |
| Antonio Gabrielli | Assistant Director |
| Mario Bramonti | Sound Recordist |
| Giuseppe Muratori | Boom Operator |
| Mario Amari | Sound Mixer |
| Franco Corridoni | Makeup Designer |
| Mario Tursi | Still Photographer |
| Lorenzo Magnolia | Assistant Director |
| Elio Petri | Screenstory |
| Ugo Pirro | Screenstory |
| Romano Cardarelli | Production Manager |
| Bruno Nicolai | Conductor |
| Elio Petri | Story |
| Ugo Pirro | Story |
| Roberto Onorati | Production Secretary |
| Antonio Gabrielli | First Assistant Director |
| Lorenzo Magnolia | Second Assistant Director |
| Armenia Balducci | Script Supervisor |
| Egidio Spugnini | Assistant Production Design |
| Adriana Olasio | Assistant Editor |
| Edoardo Romani | Assistant Editor |
| Mario Bramonti | Sound |
| Franco Corridoni | Makeup Artist |
| Rosa Luciani | Hairstylist |
| Alfredo Petri | Unit Manager |
| Hermes Gallippi | Unit Manager |
