From CBS -
NCIS: Los Angeles is a drama about the high stakes world of the Office of Special Projects (OSP), a division of NCIS that is charged with apprehending dangerous and elusive criminals that pose a threat to the nation's security. By assuming false identities and utilizing the most advanced technology, this team of highly trained agents goes deep undercover, putting their lives on the line in the field to bring down their targets.

Callen returns to the team after his short recovery from his gunshot wounds. The team investigates the death of a Navy intelligence officer and the kidnapping of his niece by a Mexican drug cartel.

Hanna questions his own identity after a group of former SEALS raid a drug dealer and kill an undercover cop.

An Air Force drone gets hijacked and is used to take out a Marine. The team goes undercover in the world of hackers to find who captured the stolen military equipment.

The team searches for a contractor accused of killing an Iraqi businessman. Callen disguises himself as a video game tester to get closer to the target. Eric reaches the 1000 friend mark on Facebook.

Vance helps lead the hunt for a North Korean assassin before she takes out scientists who defected to the United States.

The team infiltrates a counterfeiting operation by posing as paper manufacturers. Meanwhile, a female Secret Service agent makes romantic advances towards Callen.

After the discovery of a murdered woman who was found with pictures of Callen and several of his old teammates, the team follows a lead to who shot him several months ago.

The team infiltrates a militia group that stole high tech weapons. Meanwhile, Hetty travels to D.C. to secure funding for her group.

Abby is called in to investigate a murder committed by a killer who doesn't leave any evidence. Meanwhile, Hetty brings order to the office.

The team investigates a bomber who targets members of an explosives disposal team who were stationed in Iraq.

The team looks into a strip club where a sailor was killed. Hanna is confronted with his past while working with an orphan he rescued from Sudan.

A murder case forces Callen to return to a former identity who a woman fell in love with. Kensi is courted by a JAG officer.

The team searches for Dominic after he is kidnapped outside his apartment. Hanna regrets he didn't toughen up their newest teammate.

The team infiltrate an arms deal auction and prevent a deadly biotoxin from being unleashed onto the public.

Kensi is shot after she gets involved with a bank robbery. The team investigates a gang who are working with a terrorist gang.