 Frasier runs into Cliff Clavin (played by John Ratzenberger) at the airport and learns that Cliff is retiring and moving to Florida.Frasier and company attend Cliff's retirement party, where Frasier reunites with the rest of the gang from "Cheers" (minus Sam, Woody, and Rebecca), including bar regular Norm Peterson (played by George Wendt), waitress Carla Tortelli (played by Rhea Perlman), barflies Paul Krapence (played by Paul Willson) and Phil (played by Philip Perlman), and Cliff's old post-office nemesis Walt Twitchell (played by Raye Birk).In the 11th-season episode of "Frasier", "Caught in the Act", Frasier's married ex-wife, children's entertainer Nanny G, comes to town and invites him backstage for a rendezvous.