"The Fat Guy Strangler" is the 17th episode of the fourth season of the animated television series Family Guy. It originally aired on the Fox network on November 27, 2005. In the episode, Lois discovers she has a long-lost brother, Patrick, who was institutionalized after seeing his mother being seduced. Lois gets him released, but after a childhood flashback induced by Peter, Patrick becomes traumatized and starts murdering overweight people.