The puzzle of Callen's history may get more complicated. NCIS: Los Angeles will take another look at Callen's mysterious past in episode 20. 'NCIS: LA' Season 6 Spoilers: When Will Nate Getz Return? Peter Cambor Hints At Future Role Information regarding Callen's (Chris O'Donnell) family tends to come in spurts, but the CBS drama hasn't addressed the agent's personal history in quite some time.

Deeks and Kensi will have their fist fight as Sam gets shot. NCIS: Los Angeles' Deeks and Kensi will have more than just knife wielding gurkhas to worry about during "Expiration Date.

Find out who will help the 'NCIS: LA' team next. The NCIS: Los Angeles team will get a little outside help in episode 20 (filming as 617). 'NCIS: LA' Episode 18 Title Revealed, What Is Deeks Hiding & Will It Put Kensi In Danger? The CBS drama will introduce a new female character as the sixth season comes to a close, and it sounds like she will be whip smart.

A Deeks mystery is in store for episode 18. NCIS: Los Angeles' episode 18 now has a title. When Will Hetty Uncover Densi On 'NCIS: LA'? Daniela Ruah Talks Future Of Deeks & Kensi The hugely hyped story will be called "Fighting Shadows," according to Spoiler TV.