Watch Four Flies on Grey Velvet (1972) (1971) HD Full Movie Free on solarmovie.do. Watch Four Flies on Grey Velvet (1972) (1971) online free. A musician is stalked by an unknown homicidal maniac, who blackmails him for the accidental killing ...A musician is stalked by an unknown homicidal maniac, who blackmails him for the accidental killing of another stalker.