Kensi and Deeks announce they are moving in together and then are assigned to protect 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.moreless
The team investigates the murder of a tech entrepreneur turned venture capitalist who secretly developed a daemon, a background computer program that allows for undetectable data collection.
Kensi and Deeks go undercover at a decommissioned nuclear power plant to investigate the radiation poisoning of a gunnery sergeant who was moonlighting as a security guard at the facility.
A suspected North Korean spy is poisoned and hit by a truck carrying Christmas trees. The team investigates and tries to learn who is smuggling spies into the country. Meanwhile, Deeks and Kensi try to include their mothers in their Christmas plans; and Hetty notices that Granger isn't in a holiday mood.moreless
Deeks is arrested and interrogated in connection with the murder of his former partner, while the team tries to prove his innocence.
The team searches for a missing teen girl who is feared to have been recruited by a terrorist organization.
The team searches for Jada, the woman Sam led to asylum in the U.S. four years ago, after she goes missing. Meanwhile, Kensi goes undercover with DEA agent Talia Del Campo.
As the rest of the team work to prevent the cult from selling government secrets, Kensi and Deeks go undercover as cult members to rescue a former Department of Defense employee brainwashed into revealing classified information.moreless
The NCIS team searches for Sam’s former partner, Ruiz, who disappears during an undercover operation to buy a deadly explosive.
When his prisoner escapes from custody on flight from Singapore to Los Angeles, NCIS Special Agent DiNozzo teams up with the NCIS Los Angeles team for the search.
Callen and Sam mysteriously receive a cell phone and the caller threatens the lives of innocent people if the two don't do exactly what he says.
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.moreless
Del Campo turns to the NCIS team for help after her partner is murdered. When Kensi grows suspicious that Deeks is hiding something, he surprises her by introducing her to his mother.
Callen goes rogue and embarks on a secret mission leaving Sam and the team in the dark. Hetty demands Callen's operation be shut down and tasks the team with finding him.
Season 6 ends with the team traveling to Moscow where they assume multiple undercover identities to locate suspects in an ongoing case. Meanwhile, Callen uncovers new information regarding his father.
Callen and Sam search for Arkady when crew members from the missing oil tanker used in his deal with Russia are found dead in the ocean. Their investigation also uncovers Arkady's personal connection to the ship.moreless
The team search for an expert marine sniper who escaped from a veterans hospital when it's discovered he's connected to the leader of an extremist group. Meanwhile, the case reminds Kensi of her past as a sniper.moreless
Callen and Sam are shocked when an old acquaintance they thought had been murdered shows up and asks for their help. Their investigation uncovers a possible breach of America's economic sanctions against Russia.moreless
Callen and Sam work undercover 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 Callen's girlfriend. Meanwhile, Callen's first meeting with Hetty is revealed.moreless
The team investigate when a missile test is hijacked and the missile is sent off course. Hetty brings in a young computer specialist to assist in the probe, but Nell becomes jealous when the tech guru and Eric start to bond.moreless
The team investigate when three FBI agents are killed in an explosion following a successful undercover sting operation. Meanwhile, Deeks and Kensi realize Hetty knows about their relationship when she pairs Kensi with Sam, and Deeks with Callen during the probe.moreless
The NCIS team must find two missing Afghanistan soldiers who are training in the U.S. so they can't disclose classified military operations to their captors. The team worries that Sam is back to work too soon and Callen figures out that he and Sam have very little in common.moreless
Sam is shot while trying to apprehend a spy contracted by the CIA. The team enlist the help of Thapa, the elite Nepali soldier from their past, to help locate the shooter. Meanwhile, Kensi and Deeks have their first official argument.moreless
Callen and Sam are kidnapped when they follow an anonymous tip about a missing NSA agent. When the team discover they are missing, they realize it may have been a trap set by terrorists.moreless
Callen and Sam work undercover as food truck owners in Mexico to find the source of an anthrax poisoning and prevent a bioterrorism attack.
After the U.S. consulate in Tunisia is attacked, Callen and Sam go on a secret and perilous mission to retrieve key evidence from the crime scene. When they return, they seek help from the U.S. Ambassador, who narrowly escaped the attack, to provide missing information.moreless
Callen is taken hostage when terrorists take control of a building where he is working undercover to investigate an arms dealer. When the NCIS team arrive, they discover the entire building is wired with explosives.moreless
A burglary occurs at a cyber-security company, but Callen is forced to steer clear of the investigation when Hetty tells him that his girlfriend, Joelle, is one of the lead witnesses. Meanwhile, the team discuss their personal holiday travel plans.moreless
Sam reflects on his relationship with his father when the team investigate the murders of marines who have sons in military academies.
Hetty orders a lockdown and Eric becomes one of seven suspects after Granger is poisoned by the mole.