Part one details Reubens' childhood and desire to be an actor, inspired by such television shows as "Howdy Doody," "Captain Kangaroo," and "I Love Lucy." He finds acceptance at CalArts, where he hones his performance art skills. At the Los Angeles improv group The Groundlings, Reubens creates the alter ego of Pee-wee Herman and puts on a live late-night show that becomes a cult sensation and evolves into a popular tour. The hit 1985 film "Pee-wee's Big Adventure" makes him a global sensation. Subsuming himself into the character of Pee-wee, Reubens hides his personal life, and recognizes too late that fame makes for a complicated companion.