Late-night TV legend David Letterman returned to his former stomping grounds at 30 Rockefeller Plaza Monday for a surprise appearance on The Tonight Show Starring Jimmy Fallon. His cameo doubled as a ...

"Is this the 23rd hour of The Today Show?,” Letterman asked as he wandered onto the stage to greet Jimmy Fallon.

On Feb. 10, David Letterman stopped by “The Tonight Show Starring Jimmy Fallon” while his former bandleader, Paul Shaffer, ...