Roberto, a drummer in a rock band, keeps receiving weird phone calls and being followed by a mysterious man. One night he manages to catch up with his persecutor and tries to get him to talk but in the ensuing struggle he accidentally stabs him. He runs away, but he understands his troubles have just begun when the following day he receives an envelope with photos of him killing the man. Someone is killing all his friends and trying to frame him for the murders.
Cast
Michael Brandon
Roberto Tobias
Mimsy Farmer
Nina Tobias
Jean-Pierre Marielle
Gianni Arrosio
Aldo Bufi Landi
Pathologist
Calisto Calisti
Carlo Marosi
Marisa Fabbri
Amelia, the Maid
Oreste Lionello
The Professor
Fabrizio Moroni
Mirko
Corrado Olmi
Porter
Stefano Satta Flores
Andrea
Laura Troschel
Maria
Francine Racette
Dalia
Bud Spencer
Diomede / Godfrey
Dante Cleri
Coffin Salesman
Guerrino Crivello
Rambaldi, the Neighbor
Gildo Di Marco
Postman
Tom Felleghy
Police Commissioner Pini
Leopoldo Migliori
Musician
Fulvio Mingozzi
Music Studio Manager
Stefano Oppedisano
Bearded guy with girlfriend
Pino Patti
Funeral Exhibition Attendant
Ada Pometti
Extra (credit only)
Jacques Stany
Psychiatrist
Fortunato Cecilia
Funeral Exhibition Visitor (uncredited)
Franz Colangeli
Funeral Exhibition Visitor (uncredited)
Shirley Corrigan
Girl at Party (uncredited)
Luigi Cozzi
Masked Killer in Theater (uncredited)
Giovanni Di Benedetto
Funeral Exhibition Attendant (uncredited)
Sandro Dori
Funeral Exhibition Attendant (uncredited)
Renzo Marignano
Funeral Exhibition Attendant (uncredited)
Quinto Marziali
Funeral Exhibition Visitor (uncredited)
Diego Morreale
Extra (uncredited)
Anna Maria Perego
Delia's Mother (uncredited)
Pupita Lea Scuderoni
Funeral Exhibition Visitor (uncredited)
Maurizio Streccioni
Funeral Exhibition Visitor (uncredited)
Crew
Dario Argento
Director, Screenplay, Story
Luigi Cozzi
Story, Assistant Director
Mario Foglietti
Story
Françoise Bonnot
Editor
Bruno Bianchini
Assistant Editor
Sergio Fraticelli
Assistant Editor
Franco Di Giacomo
Director of Photography
Roberto Pariante
Assistant Director
Salvatore Argento
Producer
Enrico Sabbatini
Production Design
Giuseppe Lanci
Camera Operator
Roberto Forges Davanzati
Assistant Camera
Mauro Marchetti
Assistant Camera
Gianfranco Transunto
Assistant Camera
Massimo Lentini
Assistant Costume Designer
Giovanni Viti
Wardrobe Assistant, Assistant Art Director
Paolo Borselli
Hairstylist
Giovanni Morosi
Assistant Makeup Artist
Giuliano Laurenti
Makeup Artist
Massimo Anzellotti
Sound Effects Editor
Franco Bassi
Sound Mixer
Luciano Anzellotti
Sound Effects
Mario Ronchetti
Sound Engineer
Eugenio Fiori
Boom Operator
Carlo Rambaldi
Special Effects
Dino Galiano
Special Effects
Ennio Morricone
Original Music Composer
Edda Dell'Orso
Musician
Franco Pedacchia
Set Dresser
Giuseppe Ciccocioppo
Props
Roberto Carnevali
Still Photographer
Patrizia Zulini
Script Supervisor
Franco Gubiotti
Electrician
Ennio Mancini
Electrician
Anteo Pacini
Electrician
Orazio Sinacore
Electrician
Mario Grilli
Decorator
Gastone Coppa
Key Grip
Mario Boccanegra
Grip
Umberto Dessena
Grip
Fernando Monti
Grip
Valerio Garzia
Gaffer
Angelo Iacono
Production Manager
Giuseppe Mangogna
Unit Manager
Mina Manes
Tailor
Bruno Nicolai
Conductor
Carlo Du Bois
Administration
Roberta Leoni
Production Secretary
Carlo Cucchi
Production Secretary
