Dottore

Gian Maria Volonté

Augusta Terzi

Florinda Bolkan

Police Prefect

Gianni Santuccio

Plumber

Salvo Randone

Biglia

Orazio Orlando

Mangani

Arturo Dominici

Antonio Pace

Sergio Tramonti

Augusta's Husband

Massimo Foschi

Homicide Functionary

Aldo Rendine

Governess

Aleka Paizi

Canes

Vittorio Duse

Wiretapping Dep. Head

Pino Patti

Patanè

Fulvio Grimaldi

Giuseppe Licastro

Giuseppe Aguinaldo Nicastro

Filippo Degara

Filippo De Gara

Fulvio Gramaldi

Ugo Adinolfi

Franco Marletta

Giacomo Bellini

Giuseppe Terranova

Vincenzo Falanga

Roberto Bonanni

Guido Buzzelli

Gino Usai

Man Listening the Speech of Dottore (uncredited)

Calogero Azzaretto

Policeman Questioning Augusta's Husband

Gianfranco Barra

Man at Police Headquarters (uncredited)

Aristide Caporale

Officer Attending the Final Confession (uncredited)

Ettore Geri

Policeman (uncredited)

Alfonso Giganti

Officer Attending the Final Confession (uncredited)

Franco Magno

Officer Attending the Final Confession (uncredited)

Enrico Marciani

Officer Attending the Final Confession (uncredited)

Enzo Mondino

Policeman (uncredited)

Mario Pascucci

Policeman Listening the Speech of Dottore (uncredited)

Fulvio Pellegrino

Policeman Sleeping During Dottore's Address (uncredited)

Elio Petri

Officer Attending the Final Confession (uncredited)

Mario Silvestri

Man Listening to Speech (uncredited)

Alessandro Tedeschi

Arrested Contestant (uncredited)

Armando Tortorici

Policeman (uncredited)

Romano Moraschini

Officer Attending the Final Confession (uncredited)

Ugo Ballester