Cheers - Season 5 - Eps 1: The Proposal
We finally found out who Sam's telephone proposal at the end of the last episode was to - Diane! But Diane fears that Sam is meerely on the rebound after breaking up with Janet, so asks him to repeat the proposal in a more romantic occasion, but when he does (on a boat), she refuses, causing Sam to make her walk the plank. Later Diane says she does want to get married, but Sam has now retracted the proposal.
About Cheers

Title: Cheers
First Air Date: 1982-09-30
Last Air Date: 1993-05-20
Status: Ended
Rating: 7.569/10 (from 609 votes)
Language: EN
Seasons: 12
Total Episodes: 269
Network: NBC
Genres: Comedy
Production Companies: Paramount Television, Charles/Burrows/Charles Productions
Synopsis
The story about a blue-collar Boston bar run by former sports star Sam Malone and the quirky and wonderful people who worked and drank there.
Cast

Ted Danson
Sam Malone

Kirstie Alley
Rebecca Howe

Rhea Perlman
Carla Tortelli

George Wendt
Norm Peterson

John Ratzenberger
Cliff Clavin

Woody Harrelson
Woody Boyd

Kelsey Grammer
Frasier Crane