"A razor-wielding serial killer is on the loose, murdering those around Peter Neal, an American mystery author in Italy to promote his newest novel."
Anthony Franciosa
as Peter Neal
John Saxon
as Bullmer
Daria Nicolodi
as Anne
Giuliano Gemma
as Detective Germani
Christian Borromeo
as Gianni
Mirella D'Angelo
as Tilde
Veronica Lario
as Jane McKerrow
Ania Pieroni
as Elsa Manni
Eva Robin's
as Girl on Beach
Carola Stagnaro
as Detective Altieri
John Steiner
as Christiano Berti
Lara Wendel
as Maria Alboretto
Isabella Amadeo
as Bullmer's secretary
Mirella Banti
as Marion
Ennio Girolami
as Department Store Manager
Monica Maisani
as
Marino Masé
as John
Fulvio Mingozzi
as Alboretto
Giampaolo Saccarola
as Coroner
Ippolita Santarelli
as Prostitute
Francesca Viscardi
Dario Argento
as Narrator / Murderer's Hands (voice) (uncredited)
Lamberto Bava
as Elevator Repairman #1 (uncredited)
Michele Soavi
as Maria's Boyfriend / Man with Girl on Beach (uncredited)
Giuseppe Bassan
Production Design
Saverio Mangogna
Production Secretary
Enrico Lucherini
Unit Publicist
Carlo Du Bois
Production Accountant
Diego Della Valle
Shoe Design
Ferdinando Caputo
Francesca Roberti
Script Supervisor
David Block
Colorist
Roberto Priori
Assistant Editor
Piero Bozza
Vanda Caprioli
Other
Barbara Canevari
Assistant Costume Designer
Giuseppe Tinelli
Camera Operator
Maurizio Piano
Assistant Camera
Mario Moreschini
Key Grip
Roberto Marsigli
Francesco Giulivi
Gaffer
Remo Cartocci
Grip
Francesco Bellomo
Still Photographer
Giovanni Corridori
Special Effects
Romano Pampaloni
Sound Mixer
Giancarlo Laurenzi
Boom Operator
Mario Dallimonti
Sound
Massimo Anzellotti
Sound Effects
Luciano Anzellotti
Aldo Taloni
Set Dresser
Cesare Piccini
Assistant Property Master
Giuseppe Pagnotta
Property Master
Osvaldo Monaco
Massimo Garrone
Assistant Set Decoration
Antonella Caputo
Assistant Production Design
Second Assistant Director
First Assistant Director
Giuseppe Mangogna
Production Manager
Cesare Jacolucci
Production Supervisor
Pierantonio Mecacci
Makeup Artist
Patrizia Corridoni
Key Hair Stylist
Franco Tomei
Costume Designer
Pierangelo Cicoletti
Maurizio Garrone
Set Decoration
Tommaso Barbi
Franco Fraticelli
Editor
Luciano Tovoli
Director of Photography
Claudio Simonetti
Original Music Composer
Fabio Pignatelli
Massimo Morante
Salvatore Argento
Executive Producer
Claudio Argento
Producer
Story
Screenplay
Director
Angelo Iacono
General Manager