The Simpsons: 10 Best Sideshow Bob Episodes

Though Simpsons fans know him as Sideshow Bob, Kelsey Grammer's most famous role (though arguably only just before Bob) is as Frasier Crane in Cheers and his own self-titled sitcom. The Simpsons has had fun with this several times, but the best moment came in this season eight episode in which we meet Bob's brother, Sideshow Cecil, played by none other than Frasier's brother Niles, David Hyde Pierce.

Yet there is a lot more to this episode than just some fun casting. For once, Bob has actually reformed and we get to see him team up with Bart and Lisa to save the city from his evil brother. Cecil made a belated return in the more recent (and sadly disappointing) Funeral For A Fiend but the brothers' rivalry here makes the episode.