What Is... Cliff Clavin? show's host, Alex Trebek, later arrives at Cheers, tells Cliff that his response should have been accepted earlier, and announces his resignation as the host of "Jeopardy!". However, Cliff convinces Trebek to remain as host by telling him how much the show and Trebek mean to him. After Cliff shares the news with others, Norm Peterson (George Wendt) praises Trebek for doing this just to make Cliff feel better. However, Trebek says that he did not realize that Cliff was at the bar and that meeting him had been a coincidence. Trebek says that Cliff scares him and that the
Fear of Flying (The Simpsons) time in the episode for Grammer, who already had a recurring role on "The Simpsons" as Sideshow Bob, to voice Frasier Crane. Ted Danson guest starred as Sam, Woody Harrelson as Woody, Rhea Perlman as Carla, John Ratzenberger as Cliff, and George Wendt as Norm. Homer enters the Cheers bar in a scene which is a parody of a typical episode of the comedy series "Cheers". All of the speaking characters are voiced by the actors who played them in "Cheers". Ironically, Frasier Crane remains silent despite being played by "The Simpsons" veteran Kelsey Grammer, the voice of Sideshow Bob.