Just when you think you've uncovered the truth, the truth goes undercover in this action-packed second season of NCIS: Los Angeles. As Special Agent "G" Callen (Chris O'Donnell) wrestles with the demons of his past, he must lead the team, including his ex-Navy SEAL partner Sam Hanna (LL cool J), Special Agent Kensi Blye (Daniela Ruah), and LAPD Detective Marty Deeks (Eric Christian Olsen), on a whirlwind chase of ruthless terrorists, missing nuclear warheads..