Peter Cambor talks about his mysterious return to NCIS: Los Angeles

CBS's sophomore hit series 'NCIS: Los Angeles' returns with a new episode that marks the surprise return of operational psychologist Nate Getz to the team. Or does it? The episode, 'Lockup,' finds LL Cool J's character, Sam, going undercover as a prisoner to track down a terrorist group responsible for several bombings around the world. And when he's on the inside, who shows up to lend a hand -- none other than Nate.

As fans of 'NCIS: LA' know, Nate left the show after Episode 3 this season under mysterious circumstances. Was he really returning to work in the Middle East, or did Hetty send him on a secret mission?

Read more: tvsquad.com