《灰天鵝絨上的四只蒼蠅》是1971年上映的其它恐怖片電視劇，導演是達里奧·阿基多，主演包括Michael,Brandon,Mimsy,Farmer,Jean-Pierre,Marielle,Francine,Racette。影片的劇情　　Roberto, a drummer in a rock band, keeps receiving weird phone calls and being followed by a mysterious man. One night he manages to catch up with his persecutor and tries to get him to talk but in the ensuing struggle he accidentally stabs him. He runs away, but he understands his troubles have just begun when the following day he receives an envelope with photos of him killing the man. Someone is killing all his friends and trying to frame him for the murders...一部恐怖片類型恐怖片