Poster of Cast and Crew in Welcome Back, Kotter - Season 4 - Episode 20 - Oo, Oo, I Do (1)

Welcome Back, Kotter - Season 4 - Oo, Oo, I Do (1) (Episode 20)

Plot: Arnold's relationship with Mary gets serious. Then he finds out he has to move and leave the school
Episode Aired On:
Friday, May 25 1979
45 years ago