Tales from the Crypt (1989) : 3x3

Barry Blye is a frustrated actor who will do anything to get a part. He's been rejected by every acting company because he doesn't have the right look. Bad luck follows him all over. First his girlfriend breaks up with him. Then he's kicked out of his apartment. Then his old rival Winton Robins, who has ""the look"", gets a part in a weird theater's production of Hamlet. Barry goes into a frustrated rage and strangles him to death to take the part. He is shocked when he learns that the theater is really a mental hospital.