Sideshow Bob
The Simpsons character
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Robert Onderdonk Terwilliger Jr., PhD, better known as Sideshow Bob, is a recurring character in the animated television series The Simpsons. He is voiced by Kelsey Grammer and first appeared in the episode "The Telltale Head". Wikipedia
First TV appearance: The Telltale Head
Played by: Kelsey Grammer
Brother: Cecil Terwilliger
Children: Gino (son)
Created by: Al Jean; Mike Reiss; Sam Simon; Matt Groening; Jay Kogen; Wallace Wolodarsky; Brad Bird
Family: Dr. Robert Terwilliger Sr. (father); Dame Judith Onderdonk (mother); Cecil Terwilliger (brother)
Relatives: Patty Bouvier (ex-sister-in-law); Marge Simpson (ex-sister-in-law)