if diane stayed
Season 5-Sam and Diane marry
Season 6-Sam and Diane try to have a baby, Frazier and Lillith marry, we see those 2 couples interact. Lillith announces she is pregnant at the end of season 6 and so does Diane as Frasier says "once again Diane has to steal my spotlight"
Season 7- Both Lillith and Diane give birth. Storylines of parenting. Woody and Kelly start dating. Sam and Frasier have different advice on how Woody should treta the relationship
Season 8-Diane gets an offer to finish her book. Series ends with the Malone's moving to Cali, Sam sells the bar to Mr Gaines who takes over Cheers with Woody.