Marcus Daly

David Hemmings

Gianna Brezzi

Daria Nicolodi

Carlo

Gabriele Lavia

Marta

Clara Calamai

Helga Ulmann

Macha Méril

Supt. Calcabrini

Eros Pagni

Amanda Righetti

Giuliana Calandra

Prof. Giordani

Glauco Mauri

Bardi

Piero Mazzinghi

Olga

Nicoletta Elmi

Carlo's Father

Aldo Bonamano

Elvira

Liana Del Balzo

Cop Taking Notes

Vittorio Fanfoni

Police Photographer

Dante Fioretti

Massimo Ricci

Geraldine Hooper

Young Carlo

Jacopo Mariani

Rodi

Furio Meniconi

Agent Mingozzi

Fulvio Mingozzi

Fingerprint Cop

Lorenzo Piani

Police Agent

Salvatore Puntillo

Fat Cop

Piero Vida

Murderer's Hands (uncredited)

Dario Argento

Fruit Vendor (uncredited)

Salvatore Baccaro

Professor Giordani (voice)

Marc Smith

Hitman (uncredited)

Omero Capanna

Concerned Man in Restroom (uncredited)

Bruno Di Luia

Florist (uncredited)

Attilio Dottesio

Surgeon (uncredited)

Tom Felleghy

(uncredited)

Glauco Onorato

Carol (archive footage) (uncredited)

Marilù Tolo

Rabbi (uncredited)

Gianni Di Segni

Library Caretaker (uncredited)

Mario Pascucci