While most of the Cheers cast has appeared on The Simpsons (1989), most notably Kelsey Grammer in a recurring role as Sideshow Bob, Nancy Cartwright (the voice of Bart Simpson among others) is the only one of The Simpsons' six main cast members to appear on Cheers.
Andy Andy previously appeared in the season 2 episode Homicidal Ham, which aired a few days before Halloween 1983. His final appearance would be in the cold opening of the October 29, 1992 episode Do Not Forsake Me O My Postman.