DAVID LETTERMAN dropped an on-air bombshell last night -- admitting he had slept with his "Late Show" female staffers, and revealing he was the victim of a $2 million shakedown plot over the shocking affairs.
A high-ranking producer on another CBS show, "48 Hours," was arrested earlier yesterday in the extortion scheme, law-enforcement sources said last night.
Letterman appeared at ease as the show began, joking in his monologue about everything from Dick Cheney to skunks riding the subway -- but things changed when he sat behind his desk.
A nervously jokey Letterman told the audience, "I have a little story to tell you," before launching into the bizarre tale.
While the audience -- unaware what was coming -- laughed, Letterman explained that a strange package appeared in his car weeks earlier.
"There's a letter there. It said, 'I know that you do some terrible things,' " Letterman said.
Alternately serious and silly, Letterman told the audience, "I just want to reiterate how terrible this moment is."
He then detailed how the blackmailer told him he'd written a screenplay and book brimming with embarrassing revelations about Letterman's life.
"This guy knows creepy stuff about me," Letterman said.
He said he took the package to the Manhattan DA's Office, where investigators told him to arrange a meeting to see if the blackmailer was serious.
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