"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, ...

John Oliver wasn't the only late night icon to crash this week. "The Tonight Show" started Monday off with a surprise ...

David Letterman made a surprise cameo on The Tonight Show Starring Jimmy Fallon on Feb. 10, interrupting Fallon's monologue ...

While Paul Shaffer filled in the for The Roots on “The Tonight Show Starring Jimmy Fallon,” he was reunited with a surprise ...

The appearance from the former Late Night and Late Show host offered a reunion with bandleader Paul Shaffer, who is sitting in with his World’s Most Dangerous Band on The Tonight Show this week. The ...

Feb. 11 (UPI) -- David Letterman joined Jimmy Fallon during his monologue on The Tonight Show Monday. "Is this the 23rd hour of the Today show?" asked the former Late Show host, feigning confusion, ...

Fallon was riffing with Paul Shaffer and the World’s Most Dangerous Band, Letterman’s longtime sidekick and band from his time hosting CBS’ Late Show from 1982 to 2015 — Shaffer and co were filling in ...

Paul Shaffer isn’t done with late night just yet! The musician is heading to Studio 6B in Rockefeller Center with The World’s ...

TV legend David Letterman returned to his former stomping grounds at 30 Rockefeller Plaza Monday for a surprise appearance on ...

Letterman began his late night TV career at NBC, where he hosted the groundbreaking “Late Night With David Letterman” from 1982 to 1993. The show followed Johnny Carson’s “Tonight Show.” When Carson ...