Entertainment
 

David Hyde Pierce

From Wikisimpsons

David Hyde Pierce is a guest star on The Simpsons who played Sideshow Bob's brother Cecil. He first appeared in Season 8's Brother from Another Series and ten years later in Funeral for a Fiend. He is best known for playing Fraiser Crane's brother Niles in Fraiser. Sideshow Bob is voiced by Kelsey Grammer who plays Fraiser Crane in Fraiser who is the brother of Niles. John Mahoney who played Martin Crane who is the father of both Fraiser and Niles would later play the the father of Bob and Cecil.

Guest stars in Season 8
Michael Buffer | Paul Winfield | Rodney Dangerfield | Johnny Cash | Gillian Anderson | David Duchovny | Leonard Nimoy | Jack Lemmon | Alex Rocco | John Waters | David Hyde Pierce | Dave Thomas | Bret Hart | Gedde Watanabe | Sab Shimono | Gailard Sartain | Tim Conway | Willem Dafoe
Guest stars in Season 19
Stephen Colbert | Lionel Richie | Placido Domingo | Maya Rudolph | Matt Dillion | Steve Buscemi | Ted Nugent | Julia Louis-Dreyfus | Jack Black | Alan Moore | Art Spiegelman | Dan Clowes | David Hyde Pierce | John Mahoney | Keith Olberman | Jon Stewart | Dan Rather | "Weird Al" Yankovic | Kurt Loder | Topher Grace | Terry Gross | Beverly D'Angelo | Dixie Chicks | Zooey Deschanel | Jim Jarmusch | John C. Reilly | Glenn Close | Lance Armstrong | Drew Carey