Nell and Eric go under cover to track a tech-savvy husband and wife linked to the hacking of the U.S. Treasury Department; a digital forensics specialist arrives from the NCIS cyber office in San Diego to run operations in Eric and Nell's absence.
The NCIS team must work with Hetty's former Vietnam War colleagues after a highly decorated Navy captain kidnaps a Veterans Affairs administrator who has been siphoning funds.
Callen and Sam go under cover to track an engineer attempting to sell classified information; Deeks plans a surprise for Kensi and her friends.
The NCIS team works with Hetty's former Vietnam War colleagues, A.J. Chegwidden, Sterling Bridges and Charles Langston, on a gold heist investigation.
The team investigates when a defense contractor designing a nuclear attack weapon is suspected, by her husband, of selling Navy secrets to a foreign government.
When Sam's wife, Michelle, is taken from her home, the kidnappers demand that Sam's arch nemesis, Tahir Khaled, be released from prison in exchange for Michelle's whereabouts.
Sam Hanna goes rogue from the NCIS team in an attempt to stop Tahir Khaled from ever targeting his family again.
The NCIS team must work with Hetty's former Vietnam War colleagues after a highly decorated Navy captain kidnaps a Veterans Affairs administrator who has been siphoning funds.
The NCIS team works with Hetty's former Vietnam War colleagues, A.J. Chegwidden, Sterling Bridges and Charles Langston, on a gold heist investigation.
When Hetty turns in retirement papers and disappears, Shay Mosley comes to Los Angeles to oversee the team and makes staffing changes; Sam insists that Callen find a new partner.
When Sam's wife, Michelle, is taken from her home, the kidnappers demand that Sam's arch nemesis, Tahir Khaled, be released from prison in exchange for Michelle's whereabouts.
When the daughter of a notorious counterfeiter arrives in Los Angeles, Sam goes under cover as a financier; Callen partners with Anna to track the family's latest scheme.
Sam Hanna goes rogue from the NCIS team in an attempt to stop Tahir Khaled from ever targeting his family again.
During the murder investigation of a Navy Lieutenant on leave in Los Angeles, the team uncovers classified surveillance briefs she smuggled into the city that may have been sold to a foreign buyer.
When Hetty turns in retirement papers and disappears, Shay Mosley comes to Los Angeles to oversee the team and makes staffing changes; Sam insists that Callen find a new partner.
When weapons worth $1 million are stolen, the team tracks the evidence to a charity event; Mosley gets herself added to the event's guest list, bringing Callen and Sam along as her security detail.
When the daughter of a notorious counterfeiter arrives in Los Angeles, Sam goes under cover as a financier; Callen partners with Anna to track the family's latest scheme.
During the murder investigation of a Navy Lieutenant on leave in Los Angeles, the team uncovers classified surveillance briefs she smuggled into the city that may have been sold to a foreign buyer.
When weapons worth $1 million are stolen, the team tracks the evidence to a charity event; Mosley gets herself added to the event's guest list, bringing Callen and Sam along as her security detail.
When a man is shot outside of the Vietnamese Consulate, the team must find out if the incident was an act of terrorism.
When evidence in a Navy intelligence officer's death points to a team of SEALs about to embark on a mission, Sam must interrogate the group, potentially compromising their operation.
The team helps Nate Getz (Peter Cambor) and the FBI investigate when an ex-Marine is suspected of making a chemical bomb.
Callen, Hanna, Danny Williams (Scott Caan) and Chin Ho Kelly (Daniel Dae Kim) travel from Hawaii to Los Angeles in pursuit of a suspect harboring a deadly virus.
