Claudio Gora

as onorevole Mariotti

as professor Palmondi

as duca Saverio Savelli

as avvocato Ronconi

as Santini's Father

as Don Domenico Laurenzi

as Mr. Robinson

as Garrone

as Deputate Cataudella

as Attorney Ludovico Mieli

as Martinetti

as Film Actor Playing State Prosecutor

as Doctor Ferri

as Director of Casa del Giovane

as Samperi

as Prof. Calogeri

as Cardinal d'Arezzo

as District Attorney

as Raffaele Ferri

as Giacomo

as Procuratore Malta

as Le prêtre

as Doctor Carrua

as professor De Amatis

as Manuel Esteban

as Chief Physician

as Police Chief

as Rev. Pierce

as il primario dell'ospedale

as Conte Montebruno

as l'antiquario (II)

as (uncredited)

as The Honourable

as Direktor Botani / Dr. Mabuse

as Alberto

as Danilo Borelli 'Bibi'

as Crassus

as le commandeur Bracci

as Ingegner Tellandi

as Monsieur Curtatoni, l’ingénieur

as Colonnello

as Ridolfi

as Ercoli

as Pippo Contigliani

as Il marito

as Le marquis Crescenzi