Een bekende Amerikaanse horrorschrijver gaat naar Rome om zijn laatste boek te promoten. Daar blijkt dat de gruwelijke moorden uit zijn boek één voor één worden uitgevoerd. De schrijver helpt de politie bij het onderzoek, maar raakt dieper in de zaak betrokken dan hem lief is.
| Art | Giuseppe Bassan | Production Design |
| Production | Saverio Mangogna | Production Secretary |
| Editing | Roberto Priori | Assistant Editor |
| Editing | Piero Bozza | Assistant Editor |
| Sound | Luciano Anzellotti | Sound Effects |
| Art | Osvaldo Monaco | Property Master |
| Sound | Giancarlo Laurenzi | Boom Operator |
| Art | Giuseppe Pagnotta | Property Master |
| Production | Carlo Du Bois | Production Accountant |
| Crew | Giovanni Corridori | Special Effects |
| Camera | Maurizio Piano | Assistant Camera |
| Art | Aldo Taloni | Set Dresser |
| Sound | Massimo Anzellotti | Sound Effects |
| Production | Ferdinando Caputo | Production Accountant |
| Editing | David Block | Colorist |
| Costume & Make-Up | Vanda Caprioli | Other |
| Sound | Mario Dallimonti | Sound |
| Costume & Make-Up | Barbara Canevari | Assistant Costume Designer |
| Sound | Romano Pampaloni | Sound Mixer |
| Art | Antonella Caputo | Assistant Production Design |
| Directing | Francesca Roberti | Script Supervisor |
| Costume & Make-Up | Diego Della Valle | Shoe Design |
| Lighting | Francesco Giulivi | Gaffer |
| Art | Cesare Piccini | Assistant Property Master |
| Crew | Enrico Lucherini | Unit Publicist |
| Camera | Giuseppe Tinelli | Camera Operator |
| Camera | Remo Cartocci | Grip |
| Camera | Francesco Bellomo | Still Photographer |
| Art | Massimo Garrone | Assistant Set Decoration |
| Camera | Mario Moreschini | Key Grip |
| Camera | Roberto Marsigli | Assistant Camera |
| Directing | Michele Soavi | Second Assistant Director |
| Production | Cesare Jacolucci | Production Supervisor |
| Art | Maurizio Garrone | Set Decoration |
| Sound | Fabio Pignatelli | Original Music Composer |
| Camera | Luciano Tovoli | Director of Photography |
| Writing | Dario Argento | Screenplay |
| Sound | Claudio Simonetti | Original Music Composer |
| Costume & Make-Up | Pierantonio Mecacci | Makeup Artist |
| Editing | Franco Fraticelli | Editor |
| Production | Giuseppe Mangogna | Production Manager |
| Costume & Make-Up | Pierangelo Cicoletti | Costume Designer |
| Directing | Dario Argento | Director |
| Costume & Make-Up | Patrizia Corridoni | Key Hair Stylist |
| Sound | Massimo Morante | Original Music Composer |
| Production | Claudio Argento | Producer |
| Production | Salvatore Argento | Executive Producer |
| Directing | Lamberto Bava | First Assistant Director |
| Costume & Make-Up | Franco Tomei | Costume Designer |
| Writing | Dario Argento | Story |
| Production | Cesare Jacolucci | Production Manager |
| Art | Tommaso Barbi | Set Decoration |
