Which makes it all the more strange that one of the show’s most well-known characters was absolutely nowhere to be found in The Simpsons Movie: Bart’s mortal enemy Dr. Demento Sideshow Bob.

But these episodes in Grammer's life actually did come in handy when it came to him playing another of his most beloved characters: Sideshow Bob on "The Simpsons." Sideshow Bob episodes are among ...