LL Cool J Talks 'Betrayal', Romance on 'NCIS: LA'

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NCIS: Los Angeles star LL Cool J sat down with ET's Nancy O'Dell today to talk about tonight's much hyped episode, and he promises it's going to be a juicy one!

"I would call it the end of one chapter on TV and the beginning of a new chapter in music, it's pretty deep," LL says about the seriousness of the episode. "The teaser is that there's only one word I can use -- and that's betrayal."

He also jokes about his character Sam Hanna's newly uncovered romantic side.

"Well you know, Sam is capable," he laughs. "We get to see Sam interact on a romantic level so there's a little romance, we get to explore some of his home life ... we find out that he's not just a one dimensional guy that runs and shoots and jumps, but has some other vulnerabilities and some other feelings and some other things happening."

Check out the video to see more of our intimate interview with LL, and tune in to tonight's NCIS: Los Angeles to hear the debut of his brand new song No More, featuring Ne-Yo!