Shelley Long (Mary Ellen Doyle) plays the wife of John Ratzenberger (Fred Doyle). They both appered together on the hit TV show Cheers.
There is a The Brady Bunch (1969) connection in this episode. Both Kaley Cuoco and Kaitlin Cullum appeared in the TV movie Growing Up Brady (2000) as Maureen McCormick and Eve Plumb respectively. Shelley Long appeared as Carol Brady in The Brady Bunch Movie (1995) and its sequels.