Gian Maria Volonté
M.
Marcello Mastroianni
Don Gaetano
Mariangela Melato
Giacinta
Ciccio Ingrassia
Voltrano
Franco Citti
M.'s Driver
Cesare Gelli
Arras
Tino Scotti
Hotel Zafer Cook
Adriano Amidei Migliano
Minister Capra Profiri
Giancarlo Badessi
Ventre
Mario Bartolomei
Franco Lombo
Nito Costa
Young Priest
Guerrino Crivello
Speaker Priest
Marcella Di Falco
Saccà
Giulio Donnini
Bastante
Aldo Farina
Restrero
Giuseppe Leone
Senator Martellini
Renato Malavasi
Michelozzi
Riccardo Mangano
Cardinal Beccarisi
Piero Mazzinghi
Caprarozza
Lino Murolo
Mozio
Piero Nuti
Schiavò
Loris Pereira Lopez
Senator Lombo
Riccardo Satta
Lomazzo
Luigi Uzzo
Aldo Lombo
Luigi Zerbinati
Caudo
Renato Salvatori
Magistrate Scalambri
Michel Piccoli
Him
Lella Cattaneo
Capra Porfiri's Mother (uncredited)
Giuseppe Marrocco
Spiritual Practitioner (uncredited)
Aldo Valletti
Spiritual Practitioner (uncredited)
Bruno Bertocci
Spiritual Practitioner (uncredited)
Mario Castaldi
Spiritual Practitioner (uncredited)
Osvaldo Peccioli
Spiritual Practitioner (uncredited)
Cesare Nizzica
Spiritual Practitioner (uncredited)
Amedeo Salamon
Spiritual Practitioner (uncredited)
Domenico Demitri
Spiritual Practitioner (uncredited)
Carlo Cattaneo
Spiritual Practitioner (uncredited)
Franz Colangeli
Spiritual Practitioner (uncredited)
Franco Laitano
Spiritual Practitioner (uncredited)
Filippo Perego
Spiritual Practitioner (uncredited)
Mario Pascucci
Spiritual Practitioner (uncredited)
Maurizio Piacenti
Spiritual Practitioner (uncredited)
Antonio Pane
Spiritual Practitioner (uncredited)
Luciano Zanussi
Spiritual Practitioner (uncredited)
Luigi Scavran
Spiritual Practitioner (uncredited)
Vezio Natili
Hotel Zafer Receptionist (uncredited)
Maurizio Streccioni
Hotel Zafer Bodyguard (uncredited)
Decio Gambini
Senator Lombo's Driver (uncredited)