NCIS: Los Angeles is a drama about the high stakes world of undercover surveillance at the Office of Special Projects (OSP), a division of NCIS that is charged with apprehending dangerous and elusive criminals that pose a threat to the nation's security, specifically Naval and Marine assets and personnel.
DEA agent Talia Del Campo turns to the NCIS: Los Angeles team for help after her partner is murdered. Also, after Kensi grows suspicious that Deeks is hiding something, he surprises her by introducing her to his mother.
A 20-year-old Peruvian massacre is investigated after a famous fashion model, believed to be one of the survivors, becomes a potential target. Kensi goes undercover as the model's assistant, while Deeks poses as her chauffeur.
Callen and Sam are forced to work on their day off when they mysteriously receive a cell phone and the caller threatens the lives of innocent people if they don’t do exactly what he says.
NCIS Special Agent DiNozzo partners with the NCIS: Los Angeles team to search the city after his prisoner escapes custody on a flight from Singapore to Los Angeles.
The NCIS team searches for Sam’s former partner, Ruiz, who disappears during an undercover operation to buy a deadly explosive.
After a former Department of Defense employee reveals government secrets to a cult, The Church of the Unlocked Mind, Kensi and Deeks go undercover in order to protect him. Meanwhile, the team must prevent the church from selling the secrets to a Chinese spy.
The team searches for Jada (Ella Thomas), the woman Sam led to asylum in the United States four years ago, after she goes missing. Also, Kensi goes undercover with DEA Agent Talia Del Campo (Mercedes Mason).
The team searches for a missing teenage girl who is feared to have been recruited by a terrorist organization,
Deeks is arrested and interrogated in connection with the murder of his former partner, while the team tries to prove his innocence.
When a suspected North Korean spy is poisoned and hit by a truck carrying Christmas trees, the team must search for who is responsible for smuggling spies into the country. Also, Deeks and Kensi try to find a way to include their mothers in their Christmas plans, and Hetty notices that Granger isn’t feeling the holiday cheer.
Kensi and Deeks go undercover at a decommissioned nuclear power plant as the team investigates the radiation poisoning of a Gunnery Sergeant moonlighting as a security guard there.
The team investigates the murder of tech entrepreneur turned venture capitalist who secretly developed a daemon, a background computer program that allows for undetectable data collection.
When Kensi and Deeks announce to the team they are moving in together, coincidentally, Hetty assigns them to protection detail for Jack, Kensi’s ex-fiancé, who is in possession of a list containing important contacts in Afghanistan that people are willing to kill to get their hands on.
In order to locate Arkady in Russia, the NCIS team goes undercover with his daughter, Anna, at a gala in Los Angeles to gain access to the Russian Consul General’s computer.
While they’re in Russia, Callen, Sam and Anna craft a plan to break Anna’s father and his CIA agent companion out of prison. Also, Special Agent G. Callen finally learns what the “G” in his name stands for, and in Los Angeles, Kensi and Deeks take Eric into the field on an assignment.
After extensive surveillance footage of Sam’s family is found in Africa, Sam and Callen fly there to determine who is responsible and for what purpose. Also, Sam’s family is moved from their home to a safe house.
When a convicted Cuban spy escapes U.S. custody just before he is set to return to his country in a prisoner exchange, the team is shocked to learn that Anna helped him break out. Also, Deeks admits to Kensi that he thinks she is too messy.
Callen and the team try to save a child in imminent danger who has been brainwashed by a terrorist cell. Also, Deeks and Kensi discuss having children.
While assigned to protective details for the commander of the Pacific Command, the team searches for a North Korean spy.
After Operational Psychologist Nate Getz fails to check in with Hetty while working undercover on a mission linking organized crime to terrorism, the team learns he is working with an infamous crime leader,
As Granger escorts Jennifer Kim back to Los Angeles, he interrogates her regarding a North Korean spy and she admits to knowing he is her father.
Sam and Callen go undercover as firefighters when top secret information about suspected terrorists is stolen from a secure Department of Defense container at the site of a fire.
When Sam receives a distress code from his son Aiden that his school has been taken over by an extremist group, Sam, Callen, Kensi and Deeks rush to San Francisco to protect Aiden and free the hostages.
When a missile test is hijacked and sent off course, the team searches for the hacking group responsible for the attack with the help of a young computer specialist Hetty brings in to assist the team. Also, Nell sees the bond between the tech guru and Eric and she becomes jealous.
Callen and Sam are shocked when an old acquaintance, who they thought was the recent victim of a murder, appears and asks for their help. As the team investigates, they uncover a possible breach of America's economic sanctions against Russia.
The team searches for a former Marine and expert sniper who escaped a veterans hospital when they discover his connection to the leader of an extremist group. Also, the case reminds Kensi of her past as a sniper.
Callen and Sam search for answers when they find dead crew members from the missing oil tanker used in Arkady’s deal with Russia, and also discover Arkady’s personal connection to the ship.
The case involving Arkady and his personal connection to an oil tanker now leads Callen, Sam, Deeks and Kensi to Moscow, where the team must assume multiple undercover identities to locate their suspects. Meanwhile, Callen uncovers new information regarding his father, on the sixth season finale.
Callen and Sam go undercover as food truck owners in Mexico to find the source of an anthrax poisoning before it’s used to create a bioweapon.
Callen and Sam are kidnapped when they follow an anonymous tip about a missing NSA agent. When the team discovers they are nowhere to be found, they realize it could have been a trap set by terrorists.
Callen and Sam are trapped in an armed submarine that terrorists have aimed to hit an aircraft carrier in San Diego. Hetty defies orders and forgoes her trip to Washington, as the team tries to locate and save Callen and Sam and prevent the terrorist attack.
The team discovers that one of its own is compromised when they investigate the murder of a Navy contractor involved in illegal transactions of confidential data. While Hetty is under investigation in Washington, D.C., the Department of Justice arrives in LA to investigate the rest of the team.
The team takes action to protect one of its own while being interrogated by the Department of Justice. Nell goes undercover. Hetty and Director Vance give Hetty disturbing news while she is in Washington.
When the team learns that someone from its past is targeting one of its own, they desperately search the city. Operational Psychologist, Nate Getz visits Nell to help her through her traumatic experience.
Callen and Sam head to Mexico to track down the only employee who managed to escape a professional shooting at the Department of Defense. The rest of the team works to uncover the motive behind the shooting.
When Sam is arrested for murdering a woman, Callen and Granger work to clear his name. Kensi and Deeks discover a link between the victim and a student from Sam’s past.
When a man is murdered by a small drone, the team discovers his connection to a terrorist group that is planning another local attack. With time running short, Nell must use her drone expertise to try to divert a disaster in Long Beach.
Kensi and Deeks investigate the murder of a homeless man, who was a former marine and CIA agent. The probe reveals the victim had connections to the Mexican cartel.
After Granger is poisoned by the mole and Eric is one of the seven suspects, Hetty orders a lockdown while everyone is investigated.
Sam reflects on his own upbringing and relationship with his father when the team investigates the murders of marines who have sons in military academies.
The team investigates a burglary at a cyber-security company, but Callen must steer clear of the crime scene after Hetty reveals his girlfriend, Joelle, is one of the lead witnesses. Also, the team discusses their personal holiday travel plans.
While Callen is undercover in the mail room of an office building to investigate an arms dealer, it is over taken by terrorists and Callen becomes a hostage. When the team arrives to help, they discover the entire building is wired with explosives.
After U.S. Ambassador Nancy Kelly narrowly escapes a terrorist attack at the U.S. Consulate in Tunisia, Callen and Sam are sent on a secret, dangerous mission to obtain key evidence from the crime scene. Upon their return, the team seeks Kelly’s help to provide missing information.
When Callen and Sam are tasked with apprehending a spy contracted by the CIA, Sam is shot and the team enlists the help of Thapa, the elite Nepali soldier from their past, to help to find the shooter. Also, Kensi and Deeks have their first official argument.
While the team investigates the death of one of three Afghanistan soldiers who are training in the U.S., they discover two other soldiers are missing and must find them before they’re forced to reveal classified military operations to their captors. Also, Sam is back to work but his team worries it may be too soon, and Callen realizes he has very little in common with his partner.
When three FBI agents are killed in an explosion following a successful undercover sting operation, the team searches for the person behind the attack. Meanwhile, Deeks and Kensi realize the team knows about their relationship, as Hetty pairs Kensi with Sam and Deeks with Callen during the investigation.
Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacy group believed to be in possession of stolen nuclear material. Kensi transforms herself into a tattooed biker chick to play the part of Callen's girlfriend. Also, Callen's first meeting with Hetty is revealed.
The NCIS LA team investigates an abduction case while down two members, with Hetty being held in D.C. for questioning, and another still in the ICU following the mission in Syria.
After a Homeland Security agent is poisoned by a notorious Triad assassin, NCIS uncovers a warehouse of counterfeit purses and a money trail to stolen government funds. Also, Nell joins the team in the field.
The murder of a navy machinist with high security clearance sends the team on a city-wide hunt tracking evidence. Also, Anna Kolcheck partners with Callen, and Sam assists Hetty in the on-going mole investigation.
After a maintenance man saved the life of a lieutenant commander, the NCIS team uncovers his dark past which puts a local teenager in danger. Also, Sam must decide which colleague to take to the Los Angeles football game.
Callen goes undercover as a patient in a mental health hospital to search for an NSA agent who disappeared while tracking an ISIS cell trying to cross the Mexican border.
After a graduate student developing an electromagnetic weapon for the Navy is attacked, the NCIS team discovers a connection to international warfare. Also, Kensi continues grueling physical therapy for her spinal injury.
After Callen’s father, Garrison is found in an NCIS patient’s hospital room during a radiation poisoning case, Callen must take him to the boatshed for interrogation. Also, the team discusses their Thanksgiving plans.
After an unknown female assailant kills two men disguised as Sherriff’s deputies in front of Callen’s home, the NCIS team gets a new lead in the ongoing mole investigation. Also, Nell visits a prison to interview an inmate withholding information on the department’s leak.
Sam partners with Anna and Callen with Deeks as the team investigates the disappearance of a Navy Lieutenant Commander who is working with the NSA on foreign cyber threats. Also, the team celebrates the holidays together
After a Navy reservist is killed while protecting a city councilman, Sam is sent undercover in a private security firm with links to several criminal organizations. Also, Callen and Anna discuss the next steps in their relationship.
The mole has once again compromised the NCIS team as planted evidence results in the arrests of Callen, Sam, Granger and Deeks, on the day Under Secretary Duggan returns for Hetty's resignation.
Hetty goes rogue, leaving the NCIS team completely in the dark, and the mole kidnaps one of the agents.
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.
After a retirement home resident is kidnapped, the NCIS team uncovers a pair of con artists: Ginger and Edward O’Boyle, who hop from home to home scamming the elderly out of their money. Also, Callen confronts his father on his illegal activity and the danger it places on their family.
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 the U.S. Treasury Department is hacked, Nell and Eric go undercover inside a couple's retreat to track a tech savvy husband and wife linked to the crime. Also, Digital Forensics Specialist Dave Flynn arrives from the NCIS Cyber Office in San Diego to run Ops while Eric and Nell are on assignment.
After 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 to sell the classified intel. Also, Deeks plans a surprise get-together for Kensi and her out-of-town friends..
The NCIS team investigates a defense contractor, Rebecca Larmont, designing a nuclear attack weapon after her estranged husband, Victor Larmont, says he has proof she is selling Navy secrets to a foreign government. Also, Kensi goes undercover as a professional dancer at the Cuban club where the husband works, while Deeks is undercover as the bathroom attendant.
After a highly decorated Navy Captain, Charles Langston, kidnaps a Veterans Affairs administrator who has been siphoning funds, the NCIS team must work with Hetty’s former Vietnam War colleagues, now-retired Admiral AJ Chegwidden and Admiral Sterling Bridges to solve the case.
A gold heist investigation has the NCIS team working with Hetty’s former Vietnam War colleagues, Retired Admiral AJ Chegwidden, Admiral Sterling Bridges and Retired Captain Charles Langston.
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.
Callen goes undercover to infiltrate a network of Chechen terrorists who are recruiting foreign fighters to join their cause and planning their next attack in the U.S.
Callen, Sam, Kensi and Deeks go undercover as an elite tactical force in order to investigate an ambush tied to a cartel kingpin with terrorist connections.
When cyanide in a communal water jug lethally poisons a lieutenant and leaves a Navy pilot in serious condition, the NCIS: LA team investigates whether this is an isolated incident or an early test for large-scale water contamination.
Callen questions Hetty’s motivations when a bizarre case involving a mysterious woman is revealed to be an undercover agent from her past.
A nuclear explosion in the Pacific reignites the search for stolen nuclear weapons and prompts Hetty to shuffle the NCIS: LA partnerships, sending Callen and Kensi overseas and leaving Sam and Deeks teamed up state side.
While the LA team chases leads digitally and locally, the Red team travels in their mobile trucks, nicknamed 'Laverne and Shirley', in a race to track down a cunning terrorist before he disappears.
While Sam and Deeks recover from traumatic torture that will have a lasting impact on their personal and professional relationships, lives are still in jeopardy as the NCIS: LA team searches for stolen nuclear weapons.
In an effort to help Sam and Deeks return to work, Hetty calls upon Operational Psychologist Nate Getz to help them cope with their traumatic experience. Meanwhile, the rest of the NCIS: LA team investigates the murder of a former Navy Admiral and a controversial journalist aboard a private jet.
The NCIS: LA team must find who compromised a classified vaccine project from a bio tech company. Meanwhile, Deeks struggles with his emotions upon returning to the field.
The NCIS: LA team finds themselves in danger while investigating a kidnapping case of a man claiming to be Callen’s father.
Analyst Nell Jones joins the NCIS: LA team in the field when a former Navy officer’s girlfriend is kidnapped in exchange for Navy intelligence. Meanwhile, Deeks unknowingly breaks one of Hetty’s rules.
Callen goes undercover at a prestigious high school after a 15-year-old hacker compromises terrorist missions.
The team must notify Homeland Security when a murder investigation exposes a larger threat to a Los Angeles-based train.
When an antiterrorism device is stolen, the team must quickly find the suspect and the device before an attack is made against Los Angeles. Meanwhile, Hetty realizes the case is bringing her back to someone from her past.
Kensi goes undercover as a nutritionist and Deeks poses as a new patient at a rehab center to investigate the death of a Navy officer.
Callen and Sam enlist the help of a Gurkha, an elite Nepali soldier specializing in knife fighting, to retrieve a missing thumb drive. Meanwhile, Kensi and Deeks struggle to find a balance in their partnership.
When a former Romanian Communist leader and suspected war criminal is discovered to be living in Los Angeles under a false identity, the NCIS: LA team must locate him before he disappears again.
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.
While in Afghanistan, Kensi and Granger join the team on a joint case when a federal agent in Los Angeles tied to Hawala, an ancient system of money transfer, is murdered.
When two private military contractors are murdered, the teams’ investigation leads to a suspect who puts one of their own in serious danger. Meanwhile, Sam sets up Callen on a blind date.
Sam and Callen head to Mexico to search for Tuhon, a retired assassin they encountered on their very first case together, now a suspect in the murder of a diplomat. Meanwhile, Nate and Deeks stay in Los Angeles to assist with the investigation
Following an explosion at a fish market, the NCIS: LA team partners with an undercover DEA agent to determine if the incident is an act of terrorism or a botched drug smuggling deal. Meanwhile, in Afghanistan, Granger and Kensi investigate a helicopter crash that could be tied to their ongoing search for the infamous white ghost.
When an undercover agent is identified and executed by a local gang, the NCIS: Los Angeles team must locate the mole before other agents’ lives are put in danger. Meanwhile, Granger begins to worry when Kensi disappears in Afghanistan.
The NCIS: LA team is called in to determine if the computer system that controls Russian missiles is at risk after Eric overhears his friend, a computer systems expert, being attacked during online game play. Meanwhile, Kensi is shocked when a familiar face from her past shows up 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.
When the NCIS: Los Angeles team investigates a case involving a former marine who is being tracked down by members of al Qaeda for embezzling money from Iraq, Hetty assigns Nell to join Deeks in the field. Meanwhile, Eric is given a new partner in Ops
When an undercover NCIS agent is suspected of working for the smuggler he’s supposed to be investigating, the team takes him into custody to find his true intentions. Meanwhile, Kensi and Deeks discuss their personal relationship as Kensi returns to the field.
Sam is convinced that the theft of software for a new unmanned aerial vehicle is connected with the disappearance of the lead engineer's 10-year-old daughter, a girl Sam once provided protection detail for in Saudi Arabia.
When a news reporter announces the group responsible for the deadly explosion at a military-sponsored charity event, the team must investigate her claims and search for the attacker.
When the team and DEA uncover the cartel's plans to slyly transport billions of dollars’ worth of cocaine from Colombia to the U.S. using a submarine, Callen and Sam must quickly locate the missing vessel. Hetty is called to Washington in the aftermath of the controversial mission in Afghanistan.