A musician is stalked by an unknown homicidal maniac, who blackmails him for the accidental killing of another stalker.
Directed By
Dario ArgentoWritten By
Dario Argento, Luigi Collo, Mario FogliettiStudio
Universal Productions France S.A., Seda SpettacoliCast of Four Flies on Grey Velvet
Michael BrandonRoberto Tobias
Mimsy FarmerNina Tobias
Jean-Pierre MarielleGianni Arrosio
Aldo Bufi LandiPathologist
Calisto CalistiCarlo Marosi
Marisa FabbriAmelia, the Maid
Oreste LionelloThe Professor
Fabrizio MoroniMirko
Corrado OlmiPorter
Stefano Satta FloresAndrea
Laura TroschelMaria
Francine RacetteDalia
Bud SpencerDiomede / Godfrey
Dante CleriCoffin Salesman
Guerrino CrivelloRambaldi, the Neighbor
Gildo Di MarcoPostman
Tom FelleghyPolice Commissioner Pini
Leopoldo MiglioriMusician
Fulvio MingozziMusic Studio Manager
Stefano OppedisanoBearded guy with girlfriend
Pino PattiFuneral Exhibition Attendant
Ada PomettiExtra (credit only)
Jacob StanislavePsychiatrist
Fortunato CeciliaFuneral Exhibition Visitor (uncredited)
Franz ColangeliFuneral Exhibition Visitor (uncredited)
Shirley CorriganGirl at Party (uncredited)
Luigi ColloMasked Killer in Theater (uncredited)
Giovanni Di BenedettoFuneral Exhibition Attendant (uncredited)
Sandro DoriFuneral Exhibition Attendant (uncredited)
Renzo MarignanoFuneral Exhibition Attendant (uncredited)
Quinto MarzialiFuneral Exhibition Visitor (uncredited)
Diego MorrealeExtra (uncredited)
Anna Maria PeregoDelia's Mother (uncredited)
Pupita Lea ScuderoniFuneral Exhibition Visitor (uncredited)
Maurizio StreccioniFuneral Exhibition Visitor (uncredited)