A farewell to Letterman

As the clock runs out on David Letterman’s long late-night career, CBS has decided to send him off with a prime-time special.

“David Letterman: A Life on Television” will air May 4, ahead of Letterman’s final “Late Show” on May 20.

The 90-minute special, hosted by Ray Romano, whose “Everybody Loves Raymond” was produced by Letterman’s production company, will feature clips and highlights from throughout Letterman’s decades-long broadcasting career. Clips will cover his 22 years on “Late Show” on CBS, including the post-9/11 episode in which he movingly addressed the nation. Expect plenty of Stupid Pet Tricks, Stupid Human Tricks and lots of celebrity guest moments.