After Sam is shot during a firefight with the cartel, a suspect is interrogated and reveals new information on the whereabouts of Spencer Williams, the man who kidnapped Mosley’s son…

NCIS investigates the murder of a federal prison inmate who was the adopted daughter of a notorious counterfeiter. Also, Callen is summoned by the Alcohol, Tobacco and Firearms (ATF) Internal…

NCIS partners with the FBI after a Marine is murdered by a rare nerve gas. Also, Deeks shares his dream to quit law enforcement and open a bar.

Callen, Sam and Nell must find pieces of a failed rocket launch, including a top-secret government device; Hetty tries to help Keane acclimate to life in the states.

After a cryptocurrency farm is robbed of over $10 million in Bitcoin codes, Sam and Hidoko go undercover, with Sam resuming a likely compromised former alias.

Callen and Sam join forces with Anna Kolcheck and the Bureau of Alcohol, Tobacco and Firearms (ATF), when Arkady Kolcheck warns NCIS that a notorious international weapons dealer has returned…

While investigating a missing person’s case, the team uncovers a killer who puts on shows for high-paying voyeurs. Also, Mosley assigns Callen as her partner on a joint ATF mission…

Callen pursues every alternative when the Diplomatic Security Service apprehends his father, Nikita Aleksandr Reznikov, as part of an exchange for two American photographers being held hostage in Iran.

Callen and Sam pull Granger’s daughter, former spy Jennifer Kim, from witness protection to help the team locate an underground spy who has obtained an arsenal of bomb materials.

Callen, Sam, Kensi and Deeks join Hetty’s team from the Vietnam War, Sterling Bridges, A.J. Chegwidden and Charles Langston, in a dangerous and off-the-books rescue mission to save Hetty from…

While Hetty is being tortured by her captors in Vietnam, Eric and Nell find a clue to her whereabouts, prompting the team to organize a rescue mission with very little…

After napalm is detected at a crime scene, the NCIS team investigates the sole casualty for possible links to terrorism.

The team investigates a ransomware attack that takes out the entire power grid for west L.A. and paralyzes the city. Also, as the first holiday season since the death of…

The NCIS team tracks a highly skilled assailant determined to avenge her father’s death by killing a Brazilian diplomat.

Callen and the team question CIA Agent Joelle Taylor’s backstory after she escapes from a kidnapping and turns to Callen for help.

The team must find assailants who illegally crossed the border and attacked California Highway Patrol officers; Homeland Security sends Nell’s older and bossy sister to assist with the case.

Kensi is transported to a missile launch facility to help thwart a takeover of nuclear weapons.

Sam goes undercover as a day trader after a prominent investment banker with ties to a Russian oligarch is murdered. Meanwhile, one of Callen’s aliases is the victim of credit…

After weapons with a $1 million street value are stolen, the team tracks the evidence to a wealthy charity event, prompting Mosley to be added to the guest list with…

During the murder investigation of a Navy Lieutenant on leave in Los Angeles, the NCIS team uncovers classified surveillance briefs she smuggled into the city that may have been sold…

Season 9 begins with Hetty turning in retirement papers and disappearing. A new executive director arrives and immediately makes staffing changes. Meanwhile, Sam, still mourning his wife’s death, insists that…