Antonio Sabàto as Commissioner Fernando Solmi

Luciana Paluzzi as Inspector Giovanna Nunziante

Enrico Maria Salerno as Police Chief Carraro

Gabriele Ferzetti as Professor Andrea Icardi

Elio Zamuto as Professor Giacometti

Ettore Manni as Enrico Tummoli

Marino Masé as Franz Hekker - 'Francesco Pagano'

Bedy Moratti as Emilia Icardi

Adriana Fiore as Stripper

Franco Ressel as Gynaecologist

Margherita Horowitz as Antonietta - Icardi's maid

Tino Bianchi as Police Commissioner

Valentino Macchi as Petrol Station Attendant

Andrea Lala as Marshall Attardi

Benedetto Benedetti as

Mario Erpichini as Minister Mordini

Anna Mirafiore as

Adriano Amidei Migliano as Dog team leader

Attilio Dottesio as Forensic Doctor

Ida Di Benedetto as House Madam

Leila Durante as Nurse (as Leila Ducci)

Gloria Piedimonte as Carla

Andrea Scotti as Head of Scientific Team

Fernando Cerulli as Morgue Watchman

Fulvio Mingozzi as Police Inspector

Salvatore Billa as Man in the city

Adriana Falco as Fiorella Icardi

Ilona Staller as Prostitute

Nestore Cavaricci as Policeman (uncredited)