Cast and credits of Investigation of a Citizen Above Suspicion

Directed by

Elio Petri

Starring

Gian Maria Volontè
Police Inspector / Dottore

Florinda Bolkan
Augusta Terzi

Gianni Santuccio
Police Commissioner

Orazio Orlando
Brigadier Biglia

Arturo Dominici
Mangani

Massimo Foschi
Augusta Terzi's Husband

Aleka Paizi
Housekeeper

Vittorio Duse
Canes

Pino Patti
Wiretapping Supervisor

Salvo Randone
Plumber

Filippo De Gara
Agent

Gianfranco Barra
Interrogation Officer (uncredited)

Ettore Geri
Officer Attending the Final Confession (uncredited)

Alfonso Giganti
Policeman (uncredited)

Elio Petri
Policeman Sleeping During Dottore's Address (uncredited)

Written by

Elio Petri
(story and screenplay) and

Ugo Pirro
(story and screenplay)