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.
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First Air Date: Sep 09, 1975Last Air date: Jun 08, 1979Season: 4 SeasonEpisode: 95 EpisodeRuntime: 30 minutesQuality: HDIMDb: 7.20 / 10 by 50 usersPopularity: 12.026Language: English