Arnold's Girlfriend is the first and second episode of Season 2 of Diff'rent Strokes and the twenty-fourth to twenty-fifth episode overall. The episode was written by Howard Leeds, Ben Starr and Martin Cohan and directed by Gerren Keith. It originally aired on September 21, 1979 on NBC and is a two-part episode.


Arnold must have an appendectomy. Fred Tanner wants his daughter Alice put in a bedroom away from Arnold. When the two learn of this, they run away.