4 mosche di velluto grigio
- बर्ष: 1971
- देश: France, Italy
- विधा: Thriller, Mystery, Horror
- स्टुडियो: Universal Productions France S.A., Seda Spettacoli
- कीवर्ड: photographer, blackmail, claustrophobia, decapitation, male homosexuality, serial killer, whodunit, giallo
- निर्देशक: Dario Argento
- जात: Michael Brandon, Mimsy Farmer, Jean-Pierre Marielle, Aldo Bufi Landi, Calisto Calisti, Marisa Fabbri