‘The Simpsons’ Say Farewell to David Letterman with a Special ‘Late Show’ Couch Gag

On Sunday evening, The Simpsons said farewell to David Letterman, who recently announced his upcoming retirement from late night television, with a special Late Show couch gag. Instead of hopping onto their couch at home, the Simpson family stormed into an animated version of the Ed Sullivan Theater and took a seat on stage next to Dave.