The Simpsons: 30 Greatest Ever Opening Credits Gags

25. The Simpsons On Letterman

This couch gag appeared twice in the Simpsons and was updated the second time to show the family racing through New York to appear on the show, with a slightly greyer, bespectacled Letterman in the chair. The two episodes are 12 years apart, which says something for Letterman's longevity too. First aired: December 9 1993 / January 15 2012 Episode: The Last Temptation of Homer / The D'oh-cial Network