Storyboards for the animated adaptation of the legendary comic The Dark Knight Returns.
Part one and two of the storyboards for the big "Joker meets David Letterman"scene from The Dark Knight Returns. As you can see, the board reflect the original David Lettermanny character from the books, but with Conan O'Brien joining the team, the character design was adjusted.
Clip from The Dark Knight Returns Part 2, where the Joker kills an entire audience during a TV appearance. Cameo by Conan 'O Brien