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