Sideshow Bob

Dr. Robert "Bob" Underdunk Terwilliger, Jr., more commonly recognized by his stage name, Sideshow Bob, is a recurring antagonist from the long running animated sitcom . He was originally Krusty the Clown's sidekick before starting a life of crime that began with an attempt to frame Krusty for armed robbery at the Kwik-E-Mart. Bob is a self-proclaimed genius, member of the Republican Party, champion of high culture, former children's entertainer-turned-criminal mastermind and Bart Simpson's nemesis. He loves operettas, the likes of, and is also known for his gigantic feet, which have gotten him into trouble on more than one occasion.

Appearances in Christmas specials

 * "The Nightmare After Krustmas" (brief appearance)
 * "Bobby, It's Cold Outside"