The Simpsons (1989): Season 16, Episode 3 - ProjectFreeTV

16 - 3: Sleeping with the Enemy

Feeling unappreciated by her own children, Marge takes in neglected son and Springfield Elementary School bully Nelson Muntz. Horrified his tormentor is now living under the same roof, Bart goes on a mission to find Nelson's parents and reunite the Muntzes.