4 mosche di velluto grigio
- വർഷം: 1971
- രാജ്യം: France, Italy
- തരം: Thriller, Mystery, Horror
- സ്റ്റുഡിയോ: Universal Productions France S.A., Seda Spettacoli
- കീവേഡ്: photographer, blackmail, claustrophobia, decapitation, male homosexuality, serial killer, whodunit, giallo
- ഡയറക്ടർ: Dario Argento
- അഭിനേതാക്കൾ: Michael Brandon, Mimsy Farmer, Jean-Pierre Marielle, Aldo Bufi Landi, Calisto Calisti, Marisa Fabbri