David Letterman came out midway through Jimmy Fallon's 'Tonight Show' monologue and filmed a 'Tortilla Challenge' TikTok video with the host.

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 ...

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 ...

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, ...

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, ...

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

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

It’s not a secret that sleep can get more difficult with age — research suggests that up to half of older adults complain of ...

Are concerns about sleeping pills being linked to dementia based on evidence? Many people need help getting to, or staying, ...

Federal lawmakers are trying once again to push for a study on the “overmedication” of veterans by Department of Veterans ...

An emerging class of orexin-based drugs are on the cusp of disrupting care for sleep disorders — and potentially much more.