A CBS producer accused of blackmailing David Letterman used pages from a former assistant's diary that described an affair with the "Late Night" host, a law enforcement official confirmed Monday.

Stephanie Birkitt, 34, works on the show and lived in Norwalk, Conn., with Robert Halderman until August. Halderman copied parts of Birkitt's diary, which contained details of her affair with Letterman, and tried to use it as blackmail fodder, said the official, who spoke on the condition of anonymity because the investigation is ongoing.

Halderman pleaded not guilty in a Manhattan court last week to a count of attempted first-degree grand larceny in the $2 million plot. Letterman divulged details of the alleged extortion caper during his show, including the admission that he had affairs with women who worked for him on "Late Night."

Birkitt was an assistant to Letterman and frequently appeared on camera with the host in comedy bits. She has also worked at "48 Hours Mystery." Attempts to reach her Monday were unsuccessful. Go figure.

Halderman apparently copied the pages before they broke up, using them together with other e-mails and information in a package left in Letterman's limousine that was intended to extort money from him, officials said. Halderman's attorney, Gerald Shargel, said Monday the charge against his client is "so obviously out of character to the point of not making any sense." Shargel said that Letterman

Of course. David Letterman obviously made this whole thing up because he knew it would be good for his struggling career.

OH YEAH, AND DAVE'S SORRY, TOO: Letterman apologized to his wife on Monday's "Late Show," saying she had been "horribly hurt by my behavior." The late-night host vowed to repair his relationship with his wife, Regina Lasko. "Let me tell you folks, I got my work cut out for me," said Letterman, according to an early transcript of the program released by CBS. Letterman also apologized to his staff for the situation.

ATTACK OF THE SWINES: "Bones" has abruptly shut down production due to a possible outbreak of swine flu, the show's creator, Hart Hanson, announced via Twitter. "First time in 'Bones' history we are shut down from production," Hanson tweeted. "Damn swine flu! That's gonna cut into Christmas hiatus."

That's right. And no one's allowed to die, or they're fired.

A show spokesperson confirmed leading man David Boreanaz is sick, although it's unclear if he actually has the H1N1 bug. "David is out with the flu and the show shut down today since he was in every scene," says the rep. "We hope to resume production tomorrow."

NETWORK TO AIR DJ AM SHOW: MTV has decided to air "Gone Too Far," a documentary series about addiction and recovery starring the late Adam "DJ AM" Goldstein.

"Gone Too Far" will premiere 10 p.m. Monday and features DJ AM working with young addicts, meeting with their friends and families and trying to help them battle their demons. The eight installments were produced as inspirational television, with DJ AM sharing stories from his own fight with drug addition. It has now become tragic in the wake of DJ Am's fatal drug overdose in August.

In the wake of Goldstein's death, there was some speculation that MTV might opt not to air "Gone Too Far." Instead, the show is going forward with the blessing of Goldstein's family, which issued a statement. "After careful consideration we have decided to air the show. Adam felt strongly that by doing this series he could help other addicts who were at a crisis point to get sober. Adam was fully aware that if it were not for his own sobriety he never would have achieved the level of success and happiness he had found. Helping people in their recovery was a huge part of Adam's life.

FINALLY SOME GOOD NEWS: Mitch Hurwitz has finally, officially, started work on the screenplay for the long-awaited Arrested Development movie, according to the Hollywood Reporter.

Hurwitz, the creator of one of the greatest, most complex and downright barmy sitcoms of all time, will also direct the movie, which should see the continuing adventures of the deeply dysfunctional Bluth family.

The fact that the scripting stage has been announced indicates that the entire original cast has agreed to come back for the movie version, which had been a sticking point for Hurwitz, who had previously said that the movie wouldn't happen unless the entire principal past — Jason Bateman, Will Arnett, Portia De Rossi, Michael Cera, Jessica Walter, Jeffrey Tambor, Tony Hale, Alia Shawkat, and David Cross — returned.

Previously, it had been reported that Cera, whose movie career has been hugely successful post-series, had been the only holdout, but although nothing's official, it would seem that he's back on board now.

Hurwitz will cowrite the screenplay with James Vallely, who was co-executive producer on the TV show before it was canceled after three increasingly brief seasons. Imagine, who produced the show and lent Hurwitz its big boss, Ron Howard, as narrator, will coproduce the movie, along with Fox Searchlight.