"You mean they put you in peril because they thought it would be fun?"

Barbara Walters asks Paula Abdul, after Abdul reveals that she told the "American Idol" producers that Paula Goodspeed had been stalking her for 17 years and the producers -- in spite or because of that -- put Goodspeed through as a contestant. Last month, Goodspeed killed herself near Abdul's home.

David Letterman -- who also had a stalker who killed herself -- tells Abdul to sue: "This could be the biggest lawsuit in the history of television. Sue these baboons!"

(Paula looks so tiny sitting next to Dave, and she's so bundled up in layers of clothing, including a military-style jacket with rows of brass buttons. The picture of vulnerability.)

Former AI producer Nigel Lythgoe defends the show -- and it's a difficult defense, because it's not in the show's interest to call Abdul a liar:

"[Goodspeed] had been through an audition process with the producers, an audition process with the executive producers, and we were wheeling her in as a huge fan of Paula Abdul," Lythgoe said. "This is what we knew: She was a great fan, she was a lovely girl. And a great fan of Paula."

Lythgoe said doesn't remember Abdul's request to have Goodspeed removed. "This is three years ago," he said. "I honestly say I can't remember the conversation. If Paula said, that's what she said, I believe her."

Lythgoe added: "We've seen over 700,000 contestants. And one has made a terrible, terrible mistake. If you're an odds man, they are great odds."...

"I'm not angry with Paula," he said. "I think Paula's in a position of: 'It wasn't my fault,' and reaching out from that point of view. For her family's sake, it should really be dropped."

Chances of a lawsuit? I'm going to say very low.