Sideshow Bob, formally known as Dr. Robert Underdunk Terwilliger Jr., PhD, is one of The Simpsons' most adored villains. He's sophisticated, persnickety, has a penchant for high culture, and an ...

Kelsey Grammer explained the origins of Sideshow Bob on 'The Graham Norton Show,' in a story that includes Tony Bennett and theater actor Ellis Rabb.