Antonio Sabàto
Commissioner Fernando Solmi
Luciana Paluzzi
Inspector Giovanna Nunziante
Enrico Maria Salerno
Police Chief Carraro
Gabriele Ferzetti
Professor Andrea Icardi
Elio Zamuto
Professor Giacometti
Ettore Manni
Enrico Tummoli
Marino Masé
Franz Hekker - 'Francesco Pagano'
Bedy Moratti
Emilia Icardi
Adriana Fiore
Stripper
Franco Ressel
Gynaecologist
Margherita Horowitz
Antonietta - Icardi's maid
Tino Bianchi
Police Commissioner
Valentino Macchi
Petrol Station Attendant
Andrea Lala
Marshall Attardi
Mario Erpichini
Minister Mordini
Adriano Amidei Migliano
Dog team leader
Attilio Dottesio
Forensic Doctor
Ida Di Benedetto
House Madam
Leila Durante
Nurse (as Leila Ducci)
Gloria Piedimonte
Carla
Andrea Scotti
Head of Scientific Team
Fernando Cerulli
Morgue Watchman
Fulvio Mingozzi
Police Inspector
Salvatore Billa
Man in the city
Adriana Falco
Fiorella Icardi
Nestore Cavaricci
Policeman (uncredited)