A new Assistant Director is assigned to oversee LA operations for NCIS, the team begins to wonder what his intentions really are.

Sam fears for his family’s safety when his wife is called to resume a former CIA cover after a case suggests ties to the infamous Sidorov and his stolen nuke.

A senator’s daughter is the victim of a home invasion. The team investigate to determine if it was a random crime or a targeted attack due to her father’s crackdown on international cyber warfare. Meanwhile, Kensi’s holiday spirit changes after she receives a surprise Christmas gift.

The investigation into the murder of two private military contractors ends up putting a member of the team in grave danger; Sam arranges a blind date for Callen.

Callen and Sam search for a murder suspect -- a retired assassin (Danny Trejo) they encountered on their first case together.

Eric witnesses his friend, a computer systems expert, being attacked by people who want information that could redirect a missile; Kensi runs into a familiar face in Afghanistan.

After learning that Special Agent Kensi Blye disappeared and the Taliban may be he holding her captive, Hetty sends the NCIS: LA team to Afghanistan on a rescue mission.

Callen embarks on a secret project, leaving Sam and the entire team in the dark. After Hetty demands his operation be shut down, the team is tasked with locating Callen before he finds himself in over his head.

Hetty goes rogue, leaving the NCIS team completely in the dark, and the mole kidnaps one of the agents.

As the team races to save Kensi from Ferris/Sullivan, they find themselves questioning who they can trust when old faces resurface.

After Sam's wife, Michelle, is taken from her home, the kidnappers demand the prison release of Tahir Khaled, Sam's arch nemesis, in exchange for information on her whereabouts.

Following the kidnapping of Sam's wife, Michelle Hanna, Sam goes rogue from the NCIS team and attempts to stop his arch nemesis Tahir Khaled from ever targeting his family again.

The NCIS team is in danger after their pictures, as well as Mosley and her son’s names, are included on a cartel hit list. Also, NCIS Deputy Director Louis Ochoa arrives with Special Prosecutor John Rogers to interview Mosley about the off-the-books mission in Mexico.

Callen and Sam work with Navy Captain Harmon "Harm" Rabb, Jr. (David James Elliott) to locate a group of ISIS sympathizers aboard the USS Allegiance. Also, Hetty enlists her friend, Lieutenant Colonel Sarah "Mac". Mackenzie (Catherine Bell), to help obtain information from a Russian diplomat.

Callen e Sam collaborano col Capitano Harmon Rabb Jr. per catturare le spie a bordo della USS Allegiance; Hetty cerca di neutralizzare un attacco missilistico in Medio Oriente; Kensi e Deeks sono intrappolati in una Unità mobile della CIA in Iraq mentre sono sotto attacco.

Fatima è in Egitto con una task force, impegnata in un raid per stanare un criminale d'alto profilo, ma il nemico ha teso loro un'imboscata e la squadra batte in ritirata. Fatima si stacca dal gruppo e risulta dispersa.

Quando l'NCIS indaga sull'omicidio di un uomo che sta per rivelare l'origine di una massiccia operazione di contraffazione, una vecchia conoscenza diventa il loro principale sospettato e rivela il vero motivo del suo ritorno. Inoltre, Deeks fa fatica durante l'allenamento per diventare un agente ufficiale dell'NCIS.

Mentre l'NCIS deve rintracciare un leader della criminalità organizzata che sta cercando di acquistare tecnologia di difesa rubata, Callen va da Anna per porre l'ultima domanda. Inoltre, Deeks viene espulso dall'addestramento NCIS solo per scoprire che Hetty ha una sorpresa che cambia la vita per lui.

Mentre Deeks è stressato da un assistente sociale e Sam non riesce a vendere la barca, la squadra lavora su un caso di delitto collegato al furto di un missile.

When Sam's friend Tom Olsen finds himself being hunted down by enemies from his past, the NCIS team must find out who is after him.

The NCIS team continues the case with ATF and the stolen weapons. Also, Callen and Anna decide on an impromptu wedding.