David Letterman and John Oliver both paid surprise visits to their old stomping grounds Monday night. Bill Carter reports.

TV legend David Letterman made a surprise appearance on NBC’s “Tonight Show” on Monday night during host Jimmy Fallon’s ...

David Letterman made a surprise cameo on The Tonight Show Starring Jimmy Fallon on Feb. 10, interrupting Fallon’s monologue to welcome his longtime musical director Paul Shaffer and The World’s Most ...

Fans of electric musical performances would have been wise to tune into Monday's "Tonight Show Starring Jimmy Fallon." The ...

After singing the updated version of "Asshole," Leary and Fallon sat down to discuss the song. "I don't know if people are ...