David Letterman used one of his last appearances onCBS’ The Late Show to deliver a straightforward farewell to the network.

1980: Hosts “The David Letterman Show,” a daytime show on NBC, for four months. 1982: Begins a 11-year run as host of “Late Night with David Letterman” on NBC. 1993: Moves to CBS to host “Late Show ...

Without his own late-night show to host, David Letterman has enjoyed a retirement ritual of watching one ESPN staple.

David Letterman, the host of CBS' Late Show, will retire in 2015. His production company Worldwide Pants Inc. said in a press release: "David Letterman, during a taping of tonight's Late Show, said ...