Welcome Back, Kotter: Season 2, Episode 18
Has Anyone Seen Arnold? (3 Feb. 1977)
TV Episode - - Comedy
Horshack takes on the role of Cyrano de Bergerac for the school play. But when the other Sweathogs rank on him, he gets upset and runs away. Now, since nobody can find Horshack, Barbarino has to go on stage in his place as Cyrano.