Giovanna Ralli
Asst. DA Vittoria Stori
Claudio Cassinelli
Insp. Silvestri
Mario Adorf
Insp. Valentini
Franco Fabrizi
Bruno Paglia
Farley Granger
Mr. Polvesi
Marina Berti
Mrs. Polvesi
Paolo Turco
Marcello Tosti
Micaela Pignatelli
Rosa
Ferdinando Murolo
Sgt. Giardina
Salvatore Puntillo
Napoli
Eleonora Morana
Polvesi's Housemaid
Sherry Buchanan
Silvia Polvesi (as Cheryl Lee Buchanan)
Roberta Paladini
Patrizia Valentini
Luigi Antonio Guerra
Reporter
Renata Moar
Laura
Adriana Falco
Giuliana Bigi
Clara Zovianoff
Mrs. Talenti
Leonardo Severini
Agt. Russo
Lorenzo Piani
Reporter
Bruno Alias
Cop / Reporter (uncredited)
Giancarlo Badessi
Paglia's Lawyer (uncredited)
Francesco D'Adda
Doctor (uncredited)
Attilio Dottesio
Coroner (uncredited)
Steffen Zacharias
Prof. Beltrame (uncredited)
Luciano Zanussi
Cop (uncredited)