Season 8 ends with Sam going rogue from the NCIS team in an attempt to stop Tahir Khaled from targeting his family again.
Sam’s wife is kidnapped and her abductors demand that Sam’s arch nemesis, Tahir Khaled, be released from prison in exchange for her.
A gold heist investigation partners the NCIS team with Hetty’s former colleagues from the Vietnam War.
Hetty’s former Vietnam war colleagues partner with NCIS after a former Navy commander kidnaps a corrupt Veterans Affairs administrator who has been siphoning funds.
The NCIS team investigates a defense contractor, who is designing a nuclear attack weapon, after her estranged husband says he has proof she is selling Navy secrets to a foreign government. Kensi then goes undercover as a professional dancer at the Cuban club where the husband works, while Deeks works undercover as the bathroom attendant.
An engineer who was developing a new guided missile destroyer is murdered. Callen and Sam go undercover to track his co-worker aboard a plane to Tokyo who intends to sell the classified intel. Meanwhile, Deeks plans a surprise get-together for Kensi and her out-of-town friends.
The U.S. Treasury Department is hacked, and Neil and Eric go undercover inside a couple’s retreat to track a tech-savvy husband and wife who are linked to the crime. Meanwhile, Digital Forensics Specialist Dave Flynn arrives from the NCIS cyber office in San Diego to run ops while Eric and Neil are on assignment.
Sam assumes a former alias in a risky undercover operation to take down an elusive drug lord. Also, Hetty interrupts Callen and Anna’s romantic night to assign them a prisoner escort mission.
After a retirement home resident is kidnapped, the NCIS team uncover a pair of con artists: Ginger and Edward O’Boyle, who hop from home to home scamming the elderly out of their money. Meanwhile, Callen confronts his father on his illegal activity and the danger it places on their family.
Emotions run high for the team as one agent is held in an unknown location and tortured by the mole, while another discovers he was betrayed by someone he least expected.