Mervin Monroe - Cecil Terwilliger

Cecil Terwilliger

Cecil Underdunk Terwilliger is younger brother of Robert Underdunk Terwilliger a.k.a. Sideshow Bob. His first appearance was in the season 8 episode "Brother From Another Series", where it was revealed that Bob only got the job as Krusty's sideshow ten years ago because Cecil, who had always wanted to be a children's entertainer, failed his audition. He later became Springfield's "Chief Hydrological and Hydrodynamical Engineer" although he planned to blow up the new Hydroelectric dam he was building, so that nobody would how cheaply it was made - Cecil kept most of the building money for himself, making it look as if it was his brother. However, Sideshow Bob, Lisa and Bart worked together to successfully foil him. His second appearance was in the season 19 episode "Funeral for a Fiend", where, following Robert's death, he convinced Bart to go to his cremation. It turned out, though, that sideshow Bob faked the whole thing in another elaborate plot to kill Bart. He is voiced by David Hyde Pierce, who plays the younger brother of Kelsey Grammer in two television series - "The Simpsons" and "Fraiser".