Gian Maria Volonté

as Dottore

Florinda Bolkan

as Augusta Terzi

Gianni Santuccio

as Police Prefect

Orazio Orlando

as Biglia

Sergio Tramonti

as Antonio Pace

Arturo Dominici

as Mangani

Aldo Rendine

as Nicola Panunzio

Massimo Foschi

as Augusta's Husband

Aleka Paizi

as Governess

Vittorio Duse

as Canes

Pino Patti

as Wiretapping Dep. Head

Salvo Randone

as Plumber

Fulvio Grimaldi

as 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

as Man Listening the Speech of Dottore (uncredited)

Gianfranco Barra

as Interrogation Officer (uncredited)

Aristide Caporale

as Man at Police Headquarters (uncredited)

Ettore Geri

as Officer Attending the Final Confession (uncredited)

Alfonso Giganti

as Policeman (uncredited)

Franco Magno

as Officer Attending the Final Confession (uncredited)

Enrico Marciani

as Officer Attending the Final Confession (uncredited)

Enzo Mondino

as Officer Attending the Final Confession (uncredited)

Mario Pascucci

as Policeman (uncredited)

Fulvio Pellegrino

as Policeman Listening the Speech of Dottore (uncredited)

Elio Petri

as Policeman Sleeping During Dottore's Address (uncredited)

Mario Silvestri

as Officer Attending the Final Confession (uncredited)

Alessandro Tedeschi

as Man Listening to Speech (uncredited)

Armando Tortorici

as Arrested Contestant (uncredited)

Romano Moraschini

as Policeman (uncredited)

Ugo Ballester

as Officer Attending the Final Confession (uncredited)