Welcome Back, Kotter: To get up his nerve with Mary, Carvelli offers Arnold liquor. He doesn't like the idea at first, but as time goes on, he becomes addicted to drinking; developing a scary and unlikable new personality that only turns Mary away.

Starring:

Gabe Kaplan, John Sylvester White, John Travolta, Lawrence Hilton-Jacobs, Marcia Strassman, Robert Hegyes, Ron Palillo

Genre:

Comedy