NCIS: Los Angeles

Callen and Sam are trapped aboard an armed submarine bound for an attack on an aircraft carrier in San Diego. Hetty defies orders as the team races to save Callen and Sam.

The 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.

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.

When the team learns someone from their past is targeting one of their own, they search the city. Meanwhile, Nate Getz visits Nell to help her through her traumatic experience.

After a shooting at the Department of Defense, Callen and Sam go to Mexico to hunt for the only employee who managed to escape.

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 killed by a drone, the team discover his links to a terrorist group planning a local attack, and Nell uses her drone expertise to avert 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 investigate 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.

While undercover in an office building investigating an arms dealer, Callen is taken hostage when terrorists seize the site. The team discover the building is wired with explosives.

US Ambassador Nancy Kelly narrowly escapes a terrorist attack at the US consulate in Tunisia. Callen and Sam embark on a secret mission to get key evidence from the crime scene.

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 after following an anonymous tip about a missing NSA agent. When the team discover they are nowhere to be found, they realise it may have been a trap set by terrorists.

When Callen and Sam are tasked with apprehending a spy contracted by the CIA, Sam is shot. The team enlists the help of Thapa, the Nepali soldier from their past, to help to find the shooter.

The team must find two missing soldiers before they expose classified military plans.

When three FBI agents are killed in an explosion following a successful undercover sting operation, the team search for the person behind the attack.

When a missile test is hijacked and sent off course, the team search for the hacking group responsible for the attack with the help of a young computer specialist.

Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacist group believed to be in possession of stolen nuclear material.

Callen and Sam are shocked when an old acquaintance reappears seeking their help. The team's investigation uncovers 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.

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 discover his personal connection to the ship.

The case involving Arkady and his personal connection to an oil tanker now leads the team to Moscow, where they must assume multiple undercover identities to locate their suspects.