The Bob Next Door

Summary

"The Bob Next Door" is the twenty-second and penultimate episode of the twenty-first season of the American animated television series The Simpsons. It originally aired on the Fox network in the United States on May 16, 2010. In the episode, Bart Simpson becomes convinced that their new neighbor is Sideshow Bob in disguise, but after a trip to the Springfield Penitentiary they find a distressed Bob still incarcerated. Eventually, Bart discovers that Bob has surgically swapped faces with Walt, who was his cellmate at that time, and still plans to kill him, although he is ultimately defeated.