Television personality Troy McClure hosts this special show, a 138th episode spectacular. Clips highlight the first Simpsons cartoon shorts, which originally aired on “The Tracey Ullman Show.” Never-before-seen footage features moments deleted from the final versions of the show, including a James Bond spoof, a Richard Simmons-robot running amok on the Burns estate, and alternate endings from the conclusion of “Who Shot Mr. Burns—Part Two.”