Sam and Diane are plagued with doubts about getting back together.

Reconciliation comes from Sam and Diane after an unexpected turn of events.

The gang finally finds out what has happened to Diane Chambers when they see her winning an award on television. Sam calls Diane to congratulate her and ends up inviting her back to Boston where they reunite one last time. Meanwhile, Don the plumber pops the question to Rebecca and gets an unexpected answer.

Rebecca finds herself really attracted to a handsome plumber. Sam joins a help group for sexual compulsives.

After Woody, Kelly and her father Lloyd arrive at Cheers talking about classical music (they'd been to a symphony), Rebecca joins in the conversation and impresses Lloyd. He invites her to a society function. Rebecca thinks it is a date and is thrilled to bits - but is in for a shock when she arrives. Meanwhile Esther Clavin has been put in a retirement home by Cliff, but whilst Cliff feels guilty, the others think he has murdered his mother.

After Woody, Kelly and her father Lloyd arrive at Cheers talking about classical music (they'd been to a symphony), Rebecca joins in the conversation and impresses Lloyd. He invites her to a society function. Rebecca thinks it is a date and is thrilled to bits - but is in for a shock when she arrives. Meanwhile Esther Clavin has been put in a retirement home by Cliff, but whilst Cliff feels guilty, the others think he has murdered his mother.

A night of drinking leads to some surprises and revelations when Carla tells Sam that she drunkenly slept with one of the regulars that night - but can't remember who! Could it be Norm, or Cliff, or Frasier, or what about the most unlikely person in the bar she could have slept with - Paul.....?

Frasier decides to conduct an experiment in voter psychology by getting Woody on the ballot for city council and is shocked by the results.

Sam locks himself out of the bar with his house keys inside so he begins a search for a place to sleep for the night which proves more difficult than expected.

Sam enlists Harry the Hat to help win the latest war of practical jokes between Cheers and Gary's Old Towne Tavern.

Sam puts the bar's former owner in charge while he and the guys go to a drive-in theater before it closes down.

Lilith returns to Frasier only to find him with Rebecca. Matters are complicated when Lilith's disgruntled former lover comes looking for her.

The gang finds out that Frasier has officially divorced from Lilith so they try to cheer him up with a party. The party leads to a little drinking which leads to an unexpected shared moment between Frasier and Rebecca.

Carla's daughter insists on having her father walk her down the aisle, despite Carla's objections.

Robin turns up with bad news and good news. The bad news is he's broke, flat, busted. The good news is he's remembered that a money belt stuffed with cash is hidden in the bar somewhere.

Norm can avoid an audit, if he'll just sleep with his investigating IRS agent. Sam is very reluctant to let the gang watch a videotape of one of his old games.

Frasier decides to start dating again now that Lilith has left him, so he makes a date with his young secretary, Shauna. Meanwhile, Cheers is hosting a family reunion, and Cliff and Norm are hired to videotape it.

Sam gets cold feet about reaquiring his beloved car, and goes so far as to romance the buyer's widow to get it back. Rebecca befriends a pig destined to be Woody's Christmas dinner.

Rebecca's father attempts to make her return with him to San Diego while Woody tries to exert his will over Kelly, to make her move her things to his apartment.

Carla tries to hide her feelings when John Hill has a heart attack. Cliff believes that Hitler has moved into his building.

Kelly's father is convinced that Woody has blackmail on his mind when Woody sees Mr. Gaines in a romantic act with his brother's wife. Rebecca plans to hold a Thanksgiving dinner at the bar.

A distraught Frasier ends up on a ledge after Lilith informs him that she wants to spend a year away from him, sealed in a biosphere with her lover.

Rebecca spots Lilith with another man, and doesn't know whether to tell Frasier. Meanwhile, Sam hires a bouncer named Tiny, but can't bring himself to fire Tiny when nobody wants to go near him.

Maggie returns to Cheers and Cliffie, this time claiming she's carrying his baby. Rebecca hires a hack songwriter to create a jingle for the bar.

Henrí challenges Sam to a contest to see who's the bigger ladies' man. Rebecca resorts to desperate measures in her quest to quit smoking.

Norm's new job seems like a dream come true when he becomes a beer taster at a brewery. Rebecca finds she can't tear herself away from the bar's new slot machine.

Carla is forced to clean up her act and behave nicely when she's has to find another job while Cheers is being rebuilt. Woody's faith in Kelly is shaken when he learns they have religious differences.

Rebecca's smoking gets her into big trouble when she accidentally starts a fire in the bar and blames it on faulty wiring.