 The staff was able to get the central cast of the American sitcom Cheers , with the exception of Kelsey Grammer , to reunite and guest star in the episode . The staff could not arrange the script to allow 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 . 
 The staff was able to get the central cast of the American sitcom Cheers , with the exception of Kelsey Grammer , to reunite and guest star in the episode . The staff could not arrange <a href='None' title='1'><mark>the</mark></a><a href='negative_concord' title='2'><mark>script</mark></a> to allow time in the episode for Grammer , <a href='null_relcl' title='3'><mark>who</mark></a>already<a href='been_done' title='4'><mark></mark></a> 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 . 
Da staff was able to get the central cast of tdaAmerican sitcom Cheers , wit the exception of Kelsey Grammer , to reunite and guest star in thdapisode . The staff could not arrange no script to allow time in thedaisode fir Grammer , already done 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 .