Original air date: 10/04/2011 Runtime: 42:13 min. Special Agent Sam Hanna is sent undercover as a bomb specialist as the team races to locate stolen explosives somewhere in the city. Meanwhile, to much protest, Hunter changes the dynamics of the team and has Callen partnered with Kensi and Sam with Deeks.
Original air date: 12/13/2011 Runtime: 42:27 min. The NCIS team must locate a classified device with the power to destroy Los Angeles that was stolen from a college research facility. Meanwhile, Sam tries to track down a highly sought-after Christmas present for his daughter, and Eric meets Nell's parents.
Original air date: 01/03/2012 Runtime: 43:31 min. When a researcher with the Department of Defense is found dead, Nell must put her high IQ to the test when she goes undercover as his replacement. Meanwhile, Hetty's ability to lead the team is questioned by the new NCIS Assistant Director, Owen Granger.
Original air date: 02/07/2012 Runtime: 43:31 min. After a diplomatic service van transporting an unknown package from the State Department is hijacked, the NCIS team must determine who committed the crime and what has gone missing. Meanwhile, Callen and Sam celebrate five years as partners, but face one of their biggest challenges when they go undercover for a case.
Original air date: 02/14/2012 Runtime: 42:53 min. With Assistant Director Granger (guest star Miguel Ferrer) critiquing every move, the NCIS team must track down a chameleon-like killer who has evaded law enforcement agents, including their very own Special Agent G. Callen, across several countries.
Original air date: 02/21/2012 Runtime: 42:42 min. The NCIS: LA team searches for new evidence to prove Kensi Blye's innocence after she is taken into custody as the lead suspect in a murder investigation involving her deceased father's sniper unit. Real-life NCIS Director Mark D. Clookie makes a cameo appearance as NCIS Special Agent Clookie.
Original air date: 03/20/2012 Runtime: 43:29 min. The NCIS: LA team investigates a shooting outside the Vietnamese Consulate just prior to an international conference at the venue that the Secretary of the Navy is scheduled to attend. Dan Lauria guest stars as James Cleary, a retired Marine with ties to the case.
Original air date: 03/27/2012 Runtime: 43:25 min. When the body of a Navy Intel Officer is found, evidence points to a team of Navy SEALs who are about to depart on a hostage rescue mission, leaving former Navy SEAL Sam Hanna to interrogate the group and possibly compromise the mission.
Original air date: 05/01/2012 Runtime: 41:15 min. The joint NCIS: Los Angeles and Hawaii Five-0 task force travel from Hawaii to Los Angeles, when the lead suspect in the case moves to the mainland with a deadly virus in tow. Scott Caan guest stars as Hawaii Five-0 Detective Sergeant Danny Williams and Daniel Dae Kim guest stars as Hawaii Five-0 Detective Lieutenant Chin Ho Kelly.