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In addition to apologizing to his wife Regina Lasko, David Letterman also poked fun at the $2 million sexual extortion plot against him.

"I got in the car this morning and the navigation lady wasn't speaking to me," he deadpanned on his show Monday.

Talking about the cool fall weather, he said, "It's chilly outside my house; chilly inside my house."

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He also joked about what he'll do next.

"This is only phase one of the scandal," he began. "Phase two: Next week I go on Oprah and sob."

His guests also had fun at Letterman's expense.

Steve Martin told the embattled late night host that the incident "proves that you're a human being. And we weren't really that sure before."

Letterman played along. When guest Martin Short sat on Martin's lap, he joked, "You spend one more minute on his lap, you're gonna get blackmailed."

Other late night hosts didn't make any Letterman jokes Monday night - except Late Late Show host Craig Ferguson.

He said he's been put in an awkward position because Letterman's production company, Worldwide Pants, produces the Late Late Show.

"The person you work for, the person you admire and respect, is caught in an embarrassing situation," Ferguson told his audience. "And your job is to be funny about that, whilst trying to keep your own job.

He then joked, "So this is my last show."

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Ferguson defended Letterman, calling him "the king of late-night television."

"If we are now holding late-night talk show hosts to the same moral accountability as we hold politicians or clergymen, I'm out," he said. "I'm gone."