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Genre: Mystery / Thriller /  more » User Ratings: 6.6 (2,881 votes)  more »   Production Co: FOR SUBSCRIBERS ONLY Distributor: FOR SUBSCRIBERS ONLY Summary: A musician is stalked by an unknown killer who's blackmailing him for an accidential killing of another stalker. But is everything what it appears to be?  more »

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Filmmakers: Dario Argento - Director / Writer (screenplay) (story), Luigi Cozzi - Writer (story), Mario Foglietti - Writer (story), Salvatore Argento - Producer, Franco Di Giacomo - Cinematographer, Ennio Morricone - Composer, Enrico Sabbatini - Production Designer, Françoise Bonnot - Editor  more »

Cast overview, first billed only (view more cast)		STARmeter™
	Michael Brandon ... Roberto Tobias	8,577
	Mimsy Farmer ... Nina Tobias	18,145
	Jean Pierre Marielle¹ ... Gianni Arrosio	26,307
	Bud Spencer ... Godfrey 'God'	6,277
	Aldo Bufi Landi ... Pathologist	380,617