Welcome Back, Kotter (1975)

S4E21 Oo, Oo, I Do (2)

In the episode "Oo, Oo, I Do (2)," Arnold becomes distressed when his fellow Sweathogs mock him for his inability to support Mary. Feeling overwhelmed, he disappears. Mary, determined to reassure him, tracks him down and helps him realize that their love is what truly matters. With her support, Arnold overcomes his fears, and the couple ultimately decides to tie the knot.