| Person | Type | Job | Role(s) |
|---|---|---|---|
 Agostino Pascarella | Crew | Camera | Key Grip |
Andrea Piazzesi | Crew | Directing | Second Assistant Director |
Andrew W. Garroni | Crew | Production | Production Manager |
Claudio Argento | Crew | Production | Producer |
 Dario Argento | Crew | Directing | Director, Screenplay, Story |
Francesco Cuppini | Crew | Art | Set Decoration |
 Franco Fraticelli | Crew | Editing | Editor |
Germano Natali | Crew | Crew | Special Effects |
Giancarlo De Leonardis | Crew | Costume & Make-Up | Hairstylist |
Gianlorenzo Battaglia | Crew | Camera | Underwater Camera |
Giuseppe Bassan | Crew | Art | Art Direction |
Guglielmo Garroni | Crew | Production | Executive Producer |
Idelmo Simonelli | Crew | Camera | Camera Operator |
 Keith Emerson | Crew | Sound | Original Music Composer, Music Arranger |
 Lamberto Bava | Crew | Directing | Assistant Director |
 Mario Bava | Crew | Crew | Second Unit, Thanks, Second Unit Director |
Massimo Anzellotti | Crew | Sound | Sound Effects |
Massimo Lentini | Crew | Costume & Make-Up | Costume Design |
Maurizio Garrone | Crew | Art | Set Decoration |
Pierantonio Mecacci | Crew | Costume & Make-Up | Makeup Artist |
Romano Albani | Crew | Camera | Director of Photography |
Salvatore Argento | Crew | Production | Producer |
Solly V. Bianco | Crew | Production | Administration |
Alberto Altibrandi | Crew | Lighting | Gaffer |
Francesco Bellomo | Crew | Camera | Still Photographer |
Luciana Maria Costanzi | Crew | Costume & Make-Up | Hairstylist |
Luciano Anzellotti | Crew | Sound | Sound Effects |
Romano Pampaloni | Crew | Sound | Sound Mixer |
Serena Canevari | Crew | Directing | Script Supervisor |
Attilio Gizzi | Crew | Sound | Sound Effects Editor |
Cesare Jacolucci | Crew | Production | Unit Manager |
Franco Groppioni | Crew | Sound | Sound Engineer |
Michela Prodan | Crew | Production | Production Assistant |
Giancarlo Laurenzi | Crew | Sound | Boom Operator |
Saverio Mangogna | Crew | Production | Production Assistant |
Anna Maria Galvinelli | Crew | Production | Production Assistant |
Angelo Jacono | Crew | Production | Production Manager |
Godfrey Salmon | Crew | Sound | Orchestrator, Conductor, Music Arranger |
 Alida Valli | Cast | Actress | Carol |
 Ania Pieroni | Cast | Actress | Musical Student |
 Daria Nicolodi | Cast | Actress | Elise Stallone Van Adler |
Dario Argento | Cast | Actor | Narrator (voice) (uncredited) |
 Eleonora Giorgi | Cast | Actress | Sara |
 Feodor Chaliapin Jr. | Cast | Actor | Professor Arnold / Dr. Varelli |
 Filippo Perego | Cast | Actor | Tenant in New York Building (uncredited) |
 Fulvio Mingozzi | Cast | Actor | Cabdriver |
 Gabriele Lavia | Cast | Actor | Carlo |
 Irene Miracle | Cast | Actress | Rose Elliot |
 Leigh McCloskey | Cast | Actor | Mark Elliot |
 Leopoldo Mastelloni | Cast | Actor | John, the Butler |
 Paolo Paoloni | Cast | Actor | Music Teacher |
Rodolfo Lodi | Cast | Actor | Old Man |
Ryan Hilliard | Cast | Actor | Shadow |
 Sacha Pitoëff | Cast | Actor | Kazanian |
 Veronica Lazăr | Cast | Actress | Nurse |
 Ettore Martini | Cast | Actor | Burning Building Cop (uncredited) |
Luigi Lodoli | Cast | Bookbinder | |
James Fleetwood | Cast | Cook | |
Rosario Rigutini | Cast | Man | |
 Corinne Dunne | Cast | Actress | Tenant in New York Building (uncredited) |
| Person | Type | Job | Role(s) |
