Welcome Back, Kotter Season 4 Episode 20 Oo, Oo, I Do (1) ( Air Date 1979-05-25 ) Genre Comedy, Family category. Overview "Arnold's relationship with Mary gets serious. Then he finds out he has to move and leave the school. Upset, Arnold decides to propose marriage to Mary. She accepts.".
Welcome Back, Kotter Season 4 Episode 20 Oo, Oo, I Do (1)
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- Watch: Welcome Back, Kotter Season 4 Episode 20 Oo, Oo, I Do (1) on CWR-CRB
- Stars: Gabe Kaplan, John Travolta, John Sylvester White, Ron Palillo, Robert Hegyes, Lawrence Hilton-Jacobs, Marcia Strassman, Stephen Shortridge
- Director: James Komack, George Yanok, Alan Sacks, Eric Cohen, John Sebastian
