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

Franco Ressel

Gynaecologist

Margherita Horowitz

Antonietta - Icardi's maid

Tino Bianchi

Police Commissioner

Valentino Macchi

Petrol Station Attendant

Andrea Lala

Marshall Attardi

Benedetto Benedetti

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

Ilona Staller

Prostitute

Nestore Cavaricci

Policeman (uncredited)