Sideshow Bob Terwilliger (voiced by
Kelsey Grammer) is
/Krusty the Klown's silent (during the Krusty show) sidekick. Known for his abnormally large feet. Angered by being overshadowed by Krusty's "dilapidated vaudeville antics", he snapped and has tried to kill Krusty,
/Bart (for exposing his plan and landing him in jail), and indeed everyone in Springfield several times, but has failed through a combination of luck and Bart and
/Lisa's efforts. Was briefly married to
/Selma (whom he also tried to kill). Was the Robert Mithchum/Robert
? de Niro character in the
Cape Fear sendup episode. Grammer's
Frasier? costar [David Hyde Pierce]
? made an appearance in one episode as Sideshow Bob's brother Cecil.
Replaced as Krusty's sidekick by /Sideshow Mel.