Family Guy - Series 4 - The Fat Guy Strangler

Animated comedy series about family life. After discovering she has a brother named Patrick whom she never knew about, Lois takes the family to meet him, only to discover he's in a mental institution. Patrick seems sane, so Lois checks him out of the asylum to live with the Griffins. Peter, urged to lose weight by his doctor, starts a Society for the Acceptance of Fat Men. When a fat man is strangled in Quahog, Peter and his Fat Society live in terror, and fingers point to Patrick.