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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Welcome Back, Kotter - 4x20 Oo, Oo, I Do (1)
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired May 25, 1979
- Episode 4x20
- Show special No
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