A prisoner exchange goes wrong in a crowded park.
Sam, Deeks, and Kensi find they have walked into a trap while investigating a suspicious warehouse.
Sam, Kensi, and Deeks chase down a suspicious car that is hanging around the warehouse following the explosion.
A Young man is killed by a mysterious gunman.
The NCIS: LA team track a suspect, Walter Henderson, to a local hotel.
The 'buyer' that the NCIS: LA team has been tracking turns out to be an old nemesis.
The NCIS: LA team visit a gun range in order to make contact with undercover agent Mike Renko.
The NCIS: LA team tracks the Chameleon's associates to a condo in Marina Del Rey.
The team suits up to meet a potential arms buyer, but quickly realize something is amiss.
Kensi and Deeks are sent undercover as married couple Melissa and Justin when evidence points to a Russian sleeper cell in a suburban neighborhood.
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.
At the close of the second season, Hetty had mysteriously disappeared, and the team had uncovered her whereabouts. Season 3 begins with a rescue attempt that ultimately reveals information about Callen and his family.
During the second season of the hit drama NCIS: Los Angeles, we learn a great deal about the pasts of the team members. The undercover agents of OSP (Office of Special Projects) go undercover to apprehend dangerous and elusive criminals that pose a threat to the nation's security.