In the conclusion of a three-part story, a scorned Diane (Shelley Long) disrupts the press conference of Sam's current amour, local politician Janet Eldridge (Kate Mulgrew). Outraged, Sam tosses Diane out of Cheers, telling her never to come back -- but his problems are only beginning. Elsewhere, Norm (George Wendt) wonders if he will be able to resist the charms of his predatory sister-in-law. This was the final episode of Cheers' fourth season. ~ Hal Erickson, Rovi