An organized crime leader tries to buy stolen defense technology; Deeks is kicked out of NCIS training only to find that Hetty has a life-changing surprise for him.
Callen, Sam, Granger and Deeks get arrested as the result of planted evidence on the day Under Secretary Duggan arrives for Hetty's resignation.
When Hetty goes rogue, she leaves the NCIS team completely in the dark; the mole kidnaps one of the agents.
An NCIS agent is held at an unknown location and tortured by the mole, and another agent discovers he was betrayed by someone he least expected.
Callen, Sam, Granger and Deeks get arrested as the result of planted evidence on the day Under Secretary Duggan arrives for Hetty's resignation.
While investigating the kidnapping of a retirement home resident, the NCIS team discovers a pair of con artists who go from home to home scamming the elderly out of their money; Callen confronts his father on his illegal activity.
When Hetty goes rogue, she leaves the NCIS team completely in the dark; the mole kidnaps one of the agents.
Sam assumes a former alias in a risky undercover operation to take down an elusive drug lord; Hetty interrupts Callen and Anna's romantic night to assign them a mission to escort a prisoner.
An NCIS agent is held at an unknown location and tortured by the mole, and another agent discovers he was betrayed by someone he least expected.
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.
While investigating the kidnapping of a retirement home resident, the NCIS team discovers a pair of con artists who go from home to home scamming the elderly out of their money; Callen confronts his father on his illegal activity.
Callen and Sam go under cover to track an engineer attempting to sell classified information; Deeks plans a surprise for Kensi and her friends.
Sam assumes a former alias in a risky undercover operation to take down an elusive drug lord; Hetty interrupts Callen and Anna's romantic night to assign them a mission to escort a prisoner.
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.