Welcome Back, Kotter - Season 4 - Eps 16: The Goodbye Guy
Mr. Woodman's niece Kelly is babysitting for the Kotters when Juan drops by the apartment. The two abruptly fall in love and decide to move in together, but the romance begins to crumble when it seems that they can't respect one another's interests.
About Welcome Back, Kotter

Title: Welcome Back, Kotter
First Air Date: 1975-09-09
Last Air Date: 1979-06-08
Status: Ended
Rating: 7.2/10 (from 50 votes)
Language: EN
Seasons: 5
Total Episodes: 95
Network: ABC
Genres: Comedy, Family
Production Companies: Wolper Productions
Synopsis
Welcome Back, Kotter is an American television sitcom starring Gabe Kaplan and featuring a young John Travolta. Videotaped in front of a live studio audience, it originally aired on the ABC network from September 9, 1975, to June 8, 1979.
Cast

Gabe Kaplan
Gabe Kotter

John Travolta
Vinnie Barbarino

John Sylvester White
Michael Woodman

Ron Palillo
Arnold Horshack

Robert Hegyes
Juan Epstein

Lawrence Hilton-Jacobs
Freddie Washington

Marcia Strassman
Julie Kotter

Stephen Shortridge
Beau Shortridge