Episode: 045 | Aired: September 27, 1984
In the aftermath of their separation, Sam has fallen off the wagon and has returned to his playboy ways, while Diane has just returned from a self-imposed rest at a sanitarium. Diane urges Sam to get help from her psychiatrist, Dr. Frasier Crane, but does not reveal that she and Frasier are lovers.
Episode: 046 | Aired: October 04, 1984
After several sessions with Dr. Frasier Crane, Sam is getting his life back in order, so Diane feels it's time to tell the truth about her relationship with the psychiatrist. Diane agrees to take her old job back.
Episode: 047 | Aired: October 18, 1984
Sam believes that Diane is still madly in love with him, and his ego goes sky-high. Cliff fears he made a terrible mistake by turning in a co-worker for stealing,
Episode: 048 | Aired: October 25, 1984
Cheers has a Halloween costume party and Cliff meets the woman of his dreams. Frasier is called out of town and gallantly asks Sam to escort Diane to a concert they had planned to attend, but both Frasier and Diane have second thoughts about the arranged 'date.'
Episode: 049 | Aired: November 01, 1984
Sam dates a married woman and the jealous husband shows up at Cheers with a gun.
Episode: 050 | Aired: November 08, 1984
Coach falls madly in love with Irene the moment he sets eyes on her, and when she seems to return his love he proposes marriage. Irene's daughter rejects Sam's advances.
Episode: 051 | Aired: November 15, 1984
Coach is filled with joy when Irene accepts his proposal of marriage, but after winning a two million dollar lottery, her life changes dramatically and he isn't sure where he fits into it.
Episode: 052 | Aired: November 22, 1984
Diane meets Frasier's mother, a renowned psychologist who is very pleasant to her during dinner, but when Frasier leaves them alone, threatens to kill her if she continues to interfere in her son's life.
Episode: 053 | Aired: November 29, 1984
When Carla's ex-husband returns with his new bride, demanding custody of their oldest son, the normally feisty waitress acquiesces. The gang at Cheers set out to help Carla regain custody of her son.
Episode: 054 | Aired: December 06, 1984
After moving in with Frasier, Diane develops a chronic allergy and believes it's caused by his beloved dog. Frasier worries that there may be a psychological basis for her reaction.
Episode: 055 | Aired: December 13, 1984
Norm is shaken when a chest x-ray uncovers a mysterious spot. He decides to pursue his dream of sailing around the world.
Episode: 056 | Aired: December 20, 1984
Sam's flirtation with a customer at the bar gets him into trouble when she turns out to be a crazy member of Diane's therapy group.
Episode: 057 | Aired: January 03, 1985
Frasier's esteemed mentor, Dr. Ludlow, visits Cheers, falls for Carla and proposes to her.
Episode: 058 | Aired: January 10, 1985
At Diane's insistence, Sam invites Frasier to join the guys on a fishing trip. Frasier is so thrilled to be included that he doesn't even seem to mind when they abandon him in the wilderness.
Episode: 059 | Aired: January 24, 1985
Sam plays a charity baseball game against the Playboy Playmates.
Episode: 060 | Aired: January 31, 1985
Sam and Coach decide to return to school for their high school diplomas.
Episode: 061 | Aired: February 07, 1985
Norm finishes an ailing Cliff's mail route for him and ends up in jail for mail-tampering. Cliff fears he will lose his job.
Episode: 062 | Aired: February 14, 1985
A bet made during a long-forgotten drunken binge comes back to haunt Sam. The man with whom he made the wager shows up with a signed agreement stating that Sam must marry Jacqueline Bisset by midnight the next day or forfeit his bar.
Episode: 063 | Aired: February 21, 1985
Sam's reputation as a ladies' man is on the line when a female reporter visits Cheers to do a story on the singles scene and is immediately turned off by Sam's masculine smugness.
Episode: 064 | Aired: February 28, 1985
When Nick is thrown out by his new wife, he comes groveling back to Carla vowing to prove his love for her by being her slave.
Episode: 065 | Aired: March 07, 1985
Norm is forced by his boss to take a promotion and become the feared 'Corporate Killer' who fires employees.
Episode: 066 | Aired: April 11, 1985
Diane decides to leave Cheers to live in Europe with Frasier. Diane secretly wishes Sam would stop her, but instead of showing concern, Sam throws them a bon voyage party.
Episode: 067 | Aired: April 18, 1985
With Diane away in Europe, Sam must hire a new waitress. Carla thinks she has found the perfect replacement - a mature English woman to whom Sam will not be attracted.
Episode: 068 | Aired: May 02, 1985
Carla sets out for revenge when her former high school principal visits the bar.
Episode: 069 | Aired: May 09, 1985
Frasier proposes to Diane while in Europe, wanting to get married the very next day. On the phone, Sam tells Diane congratulations and does not tell of his plans to stop the wedding.