David Letterman

David Letterman's mother, Dorothy, 88, delivers the Top Ten list tonight on the "Late Show." Here's a preview from the home office.

Justice was served Tuesday, as former CBS television producer Robert "Joe" Halderman began his six-month jail term for trying to extort money from David Letterman over his office affairs.

The 52-year-old Halderman pleaded guilty in March to attempted grand larceny, admitting that he threatened to expose the late-night talk show host's extramarital activity if he didn't pay $2 million in hush money. He is also to serve 1,000 hours of community service.

Late-night talk show host David Letterman made a rare appearance on Friday's "Live! With Regis and Kelly," talking about getting his life back together after his sex-in-the-workplace scandal broke last October.

"You take a look at the explosion," Letterman said on the show, "and it knocks you down and you wake up every morning and you're scared and you're depressed and sad."

Former CBS News producer Robert "Joe" Halderman pleaded guilty on Tuesday of attempting to extort $2 million from "Late Show" host David Letterman. In exchange for the guilty plea, the ex-news producer is expected to receive six-months jail time.

In October, Halderman left a one-page letter in Letterman's limo threatening to expose details of the comedian's alleged affairs with numerous show staffers unless he paid up.

On Monday night, Jay Leno received a hefty welcome from his audience -- giving him a huge jump in the late night ratings for the new "Tonight Show."

It's been six months since Jay Leno and David Letterman have gone head-to-head in the late night arena, but the two comics will meet again with tonight's premiere of the new "Tonight Show."