A scene from the third episode of NCIS: LA Season 4. "The Fifth Man" airs October 9, 2012.

Kensi at the casino, with Deeks watching her back on NCIS: LA. "The Fifth Man" airs October 9, 2012.

Sam and G in a photo from the third episode of NCIS LA Season 4. "The Fifth Man" airs October 9, 2012.

LL Cool J as Sam Hanna on NCIS: LA. "The Fifth Man" airs October 9, 2012.

Standing from left: Daniela Ruah, Eric Christian Olsen, Chris O'Donnell and LL Cool J. Seated from left: moms Katia Barker, Jeanne Olsen, Julie O'Donnell, and Ondrea Smith. All will appear on NCIS: Los Angeles October 9.