Franco Nero as Giacomo Matteotti

Mario Adorf as Benito Mussolini

Umberto Orsini as Amerigo Dumini

Vittorio De Sica as Mauro Del Giudice

Renzo Montagnani as Umberto Tancredi

Gastone Moschin as Filippo Turati

Riccardo Cucciolla as Antonio Gramsci

Damiano Damiani as Giovanni Amendola

Stefano Oppedisano as Piero Gobetti

Manuela Kustermann as Ada Gobetti

Giulio Girola as Vittorio Emanuele III

Cesare Barbetti as Cesare Rossi

Pietro Biondi as Filippo Filippelli

Mario Maffei as Emilio De Bono

Max Dorian as Roberto Farinacci

Orazio Stracuzzi as Giovanni Marinelli

Antonio La Raina as Alfredo Rocco

Piero Gerlini as Giuseppe Emanuele Modigliani

Giorgio Favretto as Giovanni Gronchi

Mico Cundari as Giovanni Colonna di Cesarò

Ezio Marano as Alcide De Gasperi

Michele Malaspina as cardinale Pietro Gasparri

Valerio Ruggeri as don Luigi Sturzo

Aldo De Carellis as conte Santucci

José Quaglio as questore Bertini

Gianni Solaro as procuratore generale Crisafulli

Mimmo Darni as Edoardo Agnelli

Gino Santercole as generale della milizia

Franco Silva as Benedetto Fasciolo

Maurizio Arena as Attivista comunista

Giovanni Brusatori as Emilio Lussu

Manlio Busoni as Claudio Treves

Andrea Costa as onorevole Gonzales

Roberto Marelli as Giuseppe Donati

Renato Montalbano as conte Giacomo Suardo

Pietro Tordi as presidente della commissione istruttoria del Senato

Ugo Sasso as un industriale

Alfredo Francesco Bertini as cancelliere Scagnetti

Tullio Valli as