Episode: 096 | Aired: September 25, 1986
Sam prepares for a romantic evening with the lady to whom he has proposed. Carla and Frasier are dying of curiosity to know if his plans include Diane or Sam's latest flame, Councilwoman Janet Eldridge.
Episode: 097 | Aired: October 02, 1986
Diane has a change of heart and rushes to tell Sam about her newly discovered feelings, but Sam has also had second thoughts and is back to his days of playing the field.
Episode: 098 | Aired: October 09, 1986
Cliff sets his mom up with an extremely wealthy, single gentleman and he's ecstatic until his scheme takes a sudden turn for the worse.
Episode: 099 | Aired: October 16, 1986
Frasier is excited about appearing on a local TV show featuring debates between noted psychiatrists until he learns that his opponent is a woman he once dated, Dr. Lilith Sternin.
Episode: 100 | Aired: October 30, 1986
Carla thinks she has bought the house of her dreams, but when strange things start happening, she refuses to stay there until Cliff volunteers to keep her company.
Episode: 101 | Aired: November 06, 1986
Norm's enthusiasm over a recent investment - in a combination launderette-tanning salon - gets the gang at Cheers so excited they all want to get in on the deal.
Episode: 102 | Aired: November 13, 1986
When Diane brags about her upcoming date at a very exclusive restaurant, Sam retaliates by canceling her reservation and posing as a world-famous heart surgeon to get reservations of his own.
Episode: 103 | Aired: November 27, 1986
Cliff persuades Norm to join his new lodge, the Knights of Scimitar. Meanwhile, a handsome young student pursues Diane and she uses him to make Sam jealous.
Episode: 104 | Aired: November 27, 1986
The Cheers gang celebrate Thanksgiving at Carla's house.
Episode: 105 | Aired: December 04, 1986
Diane is humiliated when a magazine rejects her poem but publishes Sam's.
Episode: 106 | Aired: December 11, 1986
Woody's ex-girlfriend Beth and her fianc visit Cheers.
Episode: 107 | Aired: December 18, 1986
After the gang at Cheers lie to Diane and tell her that her dance teacher gave her a glowing report, Diane decides to audition for a ballet company.
Episode: 108 | Aired: January 08, 1987
After round after round of misunderstandings and stubbornness on both sides, Diane accepts a marriage proposal from Sam.
Episode: 109 | Aired: January 15, 1987
Sam and Diane announce that they're officially engaged. Diane selects an expensive ring and Sam tries to get her a less expensive replica.
Episode: 110 | Aired: January 22, 1987
Loretta Tortelli comes in crying and tells Carla that her husband Nick is cheating on her. Nick comes to reclaim Loretta, tries to make her jealous with Diane, but ends up kissing Carla. Meanwhile, Frasier beats Norm at chess but then gets trounced by Woody.
Episode: 111 | Aired: January 29, 1987
Carla starts dating Eddie LeBec, the new goalie for the Bruins hockey team. Frasier gets into a fight at Eddie's game and is thrown in jail. Meanwhile, Diane serves jury duty.
Episode: 112 | Aired: February 05, 1987
The defendant from Diane's court case and his wife (who accused him of attempted murder) come into Cheers for a drink. Meanwhile, Eddie's hockey game continues to go downhill and everyone at Cheers is concerned that Carla is a jinx.
Episode: 113 | Aired: February 12, 1987
Sam and Diane agree to a last 24 hours of freedom before they marry, but neither takes advantage of it.
Episode: 114 | Aired: February 19, 1987
Diane asks Sam for a couple of weeks off to visit a Buddhist monastery. Later, Cliff enters Cheers suffering from a dog bite and wants to sue the owner (a voluptuous beauty) for the pain he's endured.
Episode: 115 | Aired: February 26, 1987
Sam and Diane are surprised to hear that Frasier has asked Dr. Lilith Sternin to move in with him and the four get together for dinner. Cliff babysits for Carla's kids.
Episode: 116 | Aired: March 05, 1987
Diane and Sam have a session with Frasier's friend, a noted marriage therapist.
Episode: 117 | Aired: March 19, 1987
Woody falls in love with Sam's goddaughter and, to Sam's dismay; the pair declare they want to move in together.
Episode: 118 | Aired: March 26, 1987
Norm gets a new job with a prestigious Boston CPA firm, but it's not quite as glamorous as he leads people to believe, as his friends discover when they pay a surprise visit to his new office.
Episode: 119 | Aired: April 02, 1987
Fearing for Woody's safety, his parents insist that he return to Indiana, but the gang at Cheers produces a home movie to persuade them to change their minds.
Episode: 120 | Aired: April 30, 1987
Sam and Diane buy their dream house, but Diane's sympathy for the plight of the previous owners jeopardizes the move.
Episode: 121 | Aired: May 07, 1987
Sam and Diane appear headed for the altar, but in the end, decide to part ways.