Coach asks Diane to return to Cheers from her self-imposed ""vacation"" to help Sam, who has fallen off the wagon.

Coach asks Diane to return to Cheers from her self-imposed ""vacation"" to help Sam, who has fallen off the wagon.

Frasier asks Sam for some advice about his more intimate relationship with Diane and Cliff hides out from a vengeful fellow postal employee.

Cliff meets a woman during a costume party at Cheers that he likes very much, but he's afraid to see her again as himself.

Coach falls in love with a woman who dumps him after she wins a big lottery while Sam strikes out with her daughter.

Coach falls in love with a woman who dumps him after she wins a big lottery while Sam strikes out with her daughter.

Diane meets Frasier's mother, who quietly threatens to kill Diane if she doesn't leave Frasier alone.

Nick returns and demands of Carla a more equitable division of their marital property: namely him getting custody of one of their kids, a demand to which Carla agrees.

Diane suffers a mysterious allergic reaction after moving in with Frasier.

Norm becomes aware of his own mortality and decides to throw it all in and take off for Bora Bora.

Sam meets one of Diane's intense friends, who has her parents over to meet Sam, their future son-in-law, hours after their first date.

Frasier is devastated when he learns that his learned mentor has been dating Carla, who also has a little surprise of her own.

The guys take Frasier on a ""snipe"" hunt in the woods after Diane asks them to include the psychologist in their masculine pursuits.

Sam returns to the mound for a charity softball game against Playboy bunnies, but his competitive spirit ruins the day when he strikes them all out.

Sam and the Coach are taking the same night school course in geography, but while Coach studies, Sam dates the teacher.

Norm gets arrested when he finishes the route for an ill Cliff, but Cliff refuses to back up Norm's explanation to the authorities.

Sam stands to lose the bar to an old friend because of a bet that he would marry Jacqueline Bissett before a certain date.

Sam faces the ultimate challenge to his skills as a male animal; a lady reporter who has been investigating the Boston singles scene and has heard every line in the book.

After his second wife Loretta kicks him out, Carla's ex-husband Nick Tortelli comes to Cheers asking Carla to take him back.

Norm is promoted to company hatchet man because of his unique style for letting people go.

Diane announces that she's leaving Cheers to accompany Frasier to Italy and Sam throws her a going-away party.

Carla insists that Sam should hire an older woman to replace Diane but she doesn't reckon on Sam's attraction to the woman's daughter.

Carla calls together her former classmates from St. Clete's School for Wayward Girls to plot revenge on their former sadistic principal whom she spots drinking at Cheers.

Frasier proposes to Diane while they're in Italy and she makes an emergency call to Sam, hoping he'll talk her out of it.