The Fat Guy Strangler
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. Elsewhere, Peter starts a Society for the Acceptance of Fat Men, but when a fat man is strangled in Quahog, Peter and his Fat Society live in terror and fingers point to Patrick.