#StarWarsTheSeries. Broadcast date: Aug 18 1978. Episode 5 "Who Is XX1?" A droid with a secret named XX1 meets Luke, Leia and Han on the resort world Gaboola 7. What is he hiding? Where is he from? Elsewhere, Threepio wins at sabacc. GUEST STAR: Jack Klugman. SPECIAL APPEARANCE: Sister Sledge.