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Callen and Sam are trapped in an armed submarine that terrorists have aimed to hit an aircraft carrier in San Diego. Meanwhile, Hetty defies orders and forgoes her trip to Washington, as .. show full overview
The NCIS: LA team discovers that one of their own is compromised when they investigate the murder of a Navy contractor involved in illegal transactions of confidential data. Meanwhile, .. show full overview
The NCIS: LA team takes action to protect one of their own while being interrogated by the Department of Justice. Meanwhile, Nell goes undercover as Hetty, and Director Leon Vance gives Hetty disturbing news while she is in Washington.
When the NCIS: LA team learns that someone from their past is targeting one of their own, they desperately search the city. Meanwhile, 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. Meanwhile, 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 go undercover to investigate the murder of a homeless man who was a former marine and CIA agent and discover his connection 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 .. show full overview
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.
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 .. show full overview
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 .. show full overview
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 .. show full overview
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 .. show full overview
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 .. show full overview
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 .. show full overview
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