Sam Dalmas
Tony Musante
Julia
Suzy Kendall
Victim
Rosita Torosh
Police Detective
Omar Bonaro
Fulvio Mingozzi
Antique Dealer
Werner Peters
Tina
Karen Valenti
Girl Watching TV
Carla Mancini
Bruno Erba
Sandra Roversi (uncredited)
Annamaria Spogli
Professor Rinaldi (uncredited)
Giovanni Di Benedetto
Needles (uncredited)
Reggie Nalder
Inspector Morosini
Enrico Maria Salerno
Old Lady in Fog (uncredited)
Maria Tedeschi
Passerby who calls the Police (uncredited)
Aldo Barozzi
Mario Zandri (uncredited)
Ugo Mari
Policeman (uncredited)
Romano Targa
Monica Ranieri
Eva Renzi
Alberto Ranieri
Umberto Raho
Professor Carlo Dover
Renato Romano
Monti
Giuseppe Castellano
Berto Consalvi
Mario Adorf
Faiena
Pino Patti
Garullo
Gildo Di Marco
Director of Photography
Vittorio Storaro
Producer
Artur Brauner
Editor
Franco Fraticelli
Conductor
Bruno Nicolai
Original Music Composer
Ennio Morricone
Camera Operator
Arturo Zavattini
Director
Dario Argento
Story
Screenplay
Sound
Carlo Diotallevi
First Assistant Director
Roberto Pariante
Unit Manager
Umberto Sambuco
Enrico Umetelli
Assistant Editor
Cesarina Casini
Sergio Fraticelli
Script Supervisor
Lida Chitarrini
Boom Operator
Eugenio Fiori
Administration
Angelo Tavazza
Foley Artist
Luciano Anzellotti
Novel
Fredric Brown
Salvatore Argento
Production Design
Dario Micheli
Costume Design
Makeup Artist
Giuseppe Ferranti
Hairstylist
Lidia Puglia
Production Manager
Camillo Teti
Sound Mixer
Alberto Bartolomei