G decks a man, who is the new assistant director, and who briefs the next case. A man dies of a gunshot, said to be self-inflicted, by his wife's firearm; both have worked for a think tank under contract to the DoD; the team solve the case.

G and Sam acknowledge the fifth anniversary of their service as partners. Just outside the LAX airport four masked armed men stop a bulletproof van of the Diplomatic Security Service of the US Department of State, moving two couriers and a wooden crate, having originated in India and now bound for a warehouse in downtown Los Angeles; the bad guys seize the crate and escape with it; Callen and company investigate. G and Sam interview the couriers; Eric and Nell trace one of the trucks, two of the bad guys, and a van; then Kensi and Deeks find the van and the crate, check out the contents, and take part in a gunfight; a crew takes possession of the crate. Granger, the new assistant director, shows up and shows interest; Kensi and Deeks find a body and shoot a fed to death; G and Sam meet a private aircraft and suddenly meet also more people than expected; Sam attacks G, but Kensi and Deeks ride to the rescue; back at the boathouse the team put it all together.

Two men die in LA; a visitor, introduced as an Interpol agent, seeks help with a link to a closed NCIS case; Callen and company pursue a chameleon, who promises to kill G soon and tells why; Granger says he's there to catch a killer.

Granger summons Kensi to the boathouse; Hetty summons the others to the ops center; Kensi's father's fellow Marines have started dying, and Granger wonders whether Kensi is involved; the team start investigating and producing. [Continued.]

Kensi took a round to the torso but, wearing a bulletproof vest, survived; she steals away, hunting the shooter; she clobbers a tail and borrows his wheels; the team put the pieces together and catch the bad guy; Kensi visits her mother.

A driver causes a wreck and shoots to death the second driver; a third one blows away the first; SA Renko of the NCIS is an undercover worker of the gun shop where the first two men worked; the team find the bad guy behind it. [Continued.]

The Chameleon says that he'll walk; he tells about Renko and the Mayfield family; he demands an exchange of himself for an abducted NSA analyst; Granger cuts him loose, and the team escort him to the swap, but G takes action. [Continued.]

The LAPD releases G after an overnight stay in jail; Sam meets him; the two exchange words; G leaves in a taxicab with a tail. At the boatshed Kensi and Deeks talk with Atley, who describes certain matters, including an insurance policy nearby; while Sam watches, an Iranian briefly chats up G, who soon walks away; another Iranian approaches Hetty, but she brushes him off; later G sees the two Iranians together, and he makes a deal with them; the CIA demands an immediate arrest of G; Granger asks Nell for a warrant for both murder and treason; Deeks picks up an item from a bank, company pursues, and fireworks ensue; Deeks drops a briefcase, and an Iranian picks it up; Eric snoops and produces; the Iranians beat and question G; Sam, Kensi, and Deeks make a road trip and take a passenger; the team make another swap; Sam hands G's badge and piece back to him; Hetty returns to her office, and Granger returns her resignation; the two of them chat about their "audacious plan".

A man dies in a deliberate hit-and-run incident; the victim was a staffer of a candidate for the US Senate; G and company investigate; Kensi goes undercover as the replacement for the vic; the team solve the puzzle and nail the bad person.

After the decryption of a list of names, NCIS agents continue the search for both Sidorov, a Russian illegal-arms dealer, and leftover Russian sleeper agents with access to surreptitious nuclear bombs; NCIS teams execute concurrent arrests in seven cities around the USA; however, all seven teams find their targets already dead. G and Sam confer with Arkady; afterward G and Sam meet a tail, which consists of three CIA agents, one of whom, Snyder, Sam knows and dislikes; Kensi, Deeks, and others uncover an empty but radioactive secret room; Eric and Nell find Sidorov; Granger gives an order, but Sam pursues another idea, and Granger catches the team, yet he goes their way; the team watch Sidorov; Sam goes undercover, then he and his wife meet with Sidorov; Snyder allows Sidorov to leave the country (without bombs), but he expects him to return; Sam and Snyder walk into the surf at Santa Monica Bay, where the two of them discuss a disagreement.

A retired CIA agent dies when a lighter explodes; G and company investigate because Hetty requests the case; the fearless foursome check out high-priced call girls and more, and they defy orders, but they find the truth and the bad person.

Deeks is away to testify in court, so Granger teams with Kensi. A gang stop an armored truck, attack the crew, and steal the cargo, consisting of 100 gold bars, valued at $70M, en route to the People's Bank of China; footage abounds; Callen and company investigate. G and Sam find a dead clown, and Nell IDs him; G, Sam, and Kensi find three executed thieves; Kensi talks with the girlfriend of the sole surviving thief (Welch), then she, G, and Sam find Welch's body, and Kensi finds the gold; G and Sam check the gold, which is not gold. Hetty comments to G in private that this case involves more than just catching a thief; Eric finds a pair of anomalies; G, Sam, and Kensi check out a new firm, where they see clues and overcome three bad guys; Eric describes the facial-recognition hit on one of the guys, which lead the team to conclude that the case is not merely a heist but rather a state-sponsored economic terrorist attack on the financial infrastructure of the USA.

In Mexico a US joint team makes a raid to capture the head of a drug cartel; due to a leak the team walks into an ambush; Granger tasks the gang to pinpoint the breach; they go undercover, find the leak, grab the head man, and rescue Nell.

A thief steals a used notebook computer from a store; a car hits the thief, and two occupants of the car stuff the victim into the back seat; the thief is Amir, the nephew of Yusef, whom Sam still owes on a debt incurred in Afghanistan some years ago; a third occupant of the car, Habib, is a known terrorist; Callen and company investigate (after several tense moments at the start). While Sam visits Yusef, bad guys drive by and open fire; Sam returns fire and drops one of them, Ali, a member of a radical jihadist group; Eric learns that Ali and Amir knew each other; Kensi and Deeks meet Nicole, Amir's girlfriend; Sam follows Ali's brother, then he and G find an arsenal; Kensi and Deeks go back to Nicole's pad, where they find her in trouble, and where they exchange fire with bad guys, rescue Nicole, and see a photograph; Deeks experiences enlightenment; Sam goes back to the boathouse, where he enters a mess; G, Kensi, and Deeks pitch in, then everything works out.

In Idaho someone executes a Marine gunnery sergeant with a pistol; two days before in Los Angeles someone used the same weapon in the same way to kill an Indonesian man; the LA bunch collaborate with an NCIS mobile team. [Continued.]

The G gang and the Red Team continue to pursue Spears and other bad guys; attention turns to a big player in illegal immigration and a man with a red scarf; Hetty sees that Spears is not the executioner, then the teams catch the right one.

Nell reports the death of the kingpin of a Mexican drug cartel in a police shootout; the body of the victim disappears from the morgue as soon as it arrives; G and company investigate the possibility of a leak, and they discover the truth.

Gunmen stalk and attack a woman, who disappears; three others die; Hetty cryptically assigns G and company to investigate; Hetty finds the woman, an NCIS agent undercover; the team catch the bad guys; G and Hetty discuss backgrounds.

A nuclear bomb explodes in a desert in Mexico; G and company investigate; Sam and Michelle go underground; G and Kensi go to Iran and bring back the Chameleon, who takes part in a complex deal to gain the two missing bombs. [Continued.]

G, Kensi, and the office crew continue to pursue the wrongdoers and the missing nuclear bombs while Sam and Deeks remain in custody; later the team gather on a helipad, where they hold a shootout; a NEST team seizes the bombs.

An aircraft crashes in Burbank, killing all aboard. At first it appears the pilot inexplicably flew straight into the runway, but as the team investigates they find evidence of murder. Nate returns to evaluate Sam and Deeks.

Deeks returns; in LA the CEO of a biotech firm dies in an explosion of his car; the firm does research for a vaccine against the deadly ricin virus; the G team figure out the bombing and a theft by extortion, and they catch the bad guys.

Someone abducts a German immigrant man; Hetty sends G to Camp Pendleton; everyone else on the team starts working on the abduction; G tails them and joins them; Arkady lends a hand; the gang figure out some of it, and Hetty tells the rest.

In broad daylight three bad guys forcibly abduct Robin, the girlfriend of William, a recently discharged Naval intelligence officer, who specialized in the design of highly classified drone navigation; G and Sam find William in his office, and Nell joins them; a bad guy calls William, so the foursome converge on a building just in time for an explosion; Eric belatedly catches an important clue; William and Oscar, his business associate, make admissions; the foursome rush a rural shack and wipe out the kidnappers, but they do not find Robin, whom Nell then sees at William's office; G and Sam take William and Robin to the boatshed; Eric joins Nell in the field to protect his interest; on G's order Kensi and Deeks shift gears, and they produce; Nell uses a piece of hardware to detain Oscar for G and Sam, who have put the pieces together; the team take the bad actors in custody; all six of the field workers head out for a debriefing over cold beer.

A joint task force (involving the CIA, FBI, and NCIS) raid a meeting in a house in an attempt to capture members of the Molina drug cartel and the Al Qaeda; however, they walk into an ambush; the new SecNav, suspecting a mole or other leak, directs the Callen team to investigate and correct; at the boatshed Kensi and Deeks interview four participants in the raid; Eric determines that the problem is not a mole but rather a hacker, which, Hetty says, is even worse; on the cellphones of two agents Eric discovers the hacker's malware, which allowed the hacker to intercept all calls, both incoming and outgoing; in an alley the foursome grab the hacker (Cindy, a 15-year-old girl) and her laptop computer; G suddenly becomes a substitute teacher, then he finds the track coach wearing a belt as a necklace; Eric finds a link and the man responsible; the gang figure out everything; with Cindy's help the team grab the bad guy who misused Cindy and her activities.

Two trespassers kill a security guard in a rail yard in LA; Hetty expresses concern about terrorism; the team soon target the rail company; a recently fired brakeman hijacks a train; the team solve the puzzle, and Sam prevents a disaster.

At a research facility of the US Department of Energy in Los Angeles, an intruder steals electronic data and leaves, then a third thug shoots the thief and his wheelman, then a security guard intervenes, and the third bad guy shoots the guard while the wheelman escapes, leaving the thief and the guard on the pavement and taking the stolen data; the guard was a retired Marine gunnery sergeant; the data pertains to an antiterrorism nuclear-detection system. G and Sam visit the home of the wheelman, whom they find dead; G and Sam visit the injured guard; Nell does a chore for Hetty, Eric provides data, and Hetty serves as backup; the foursome respond to an alarm and find a person of interest but no bomb or other hot material; Nell sees a special person, G and Sam grab him, and Hetty chats him up at the boatshed; the foursome, with Nell's help, pull a scam on a bunch of Russkis, recover the data, then move out; Granger freaks out, but everything works out.

A lieutenant commander in Naval intelligence dies at an upscale addiction-rehab villa in Malibu, near Los Angeles; Kensi and Deeks go undercover at the spa; Eric and Nell give much help; the team solve the case and prevent a major tragedy.

A masked intruder decapitates a Pentagon consultant in Bahrain and steals a flash drive containing top-secret data; the drive turns up in Hollywood; a Gurkha works with the team; they find the answers and eventually the drive as well.

A Romanian suspected war criminal and human trafficker has lived 20 years in the LA area; he eludes the FBI; the G team help to find and seize him; a CIA guy adds facts; against orders the threesome grab him; Kensi arrives in Afghanistan.

An intruder attacks a senator's daughter, but she eludes him; the senator has led an investigation of certain activities of a unit of the Chicom Army; the G team find much action and the real reason; Hetty makes gifts to Kensi and to Deeks.

A man dies in an explosion of his car; he's an undercover agent of the US Department of the Treasury, who investigated an ancient Middle Eastern technique for anonymous transfers of funds; the team solve the puzzle and prevent a tragedy.

Two dead bodies show up in an alley; the LAPD calls the G team; the vics were former military and former employees of the private contracting firm linked to a previous story; Nell goes into the field and does well; the team solve the case.

At a consulate in LA a thug kills the envoy and two security men; he tries to lay the blame elsewhere; G and Sam go to Mexico City, take part in a rumble, and return with an old friend.

At a fish market in LA an explosion kills two employees; G, Sam, and Deeks look for evidence of international terrorism; while working with a DEA agent, the team solve the case and find the bad guys; Kensi overseas takes a shot but misses.

In LA a local gang torture and execute an ATF undercover agent, who worked with the US Navy on a joint task force; G and Sam find the body and a clue, which leads to a club, where the team solve the case, find a leak, and take care of it.

While Eric and a buddy, Ira, play an online game, a sniper opens fire on Ira's pad, and thugs break in; the G team look into security involving Russia and Chechnyan separatists; the team safely work out everything. Kensi remains in trouble.

Hetty, suspecting that Kensi has become a prisoner of Taliban insurgents, sends G, Sam, and Deeks to aid her; G, Sam, and Granger overcome trouble and find Kensi and another; Deeks produces help; all works out; the gang prepare to go home.

In LA two Iraqis demand money from a discharged Marine, who's also a former security contractor from Iraq and a recently released federal prisoner; the Callen team find surprises, explanations, and bad guys; Kensi returns to field work.

G and Sam abduct an undercover NCIS agent suspected of having turned to the side of the smuggler whom he's investigated; Kensi and Deeks play head games with the agent, G and Sam play them with the suspect, and the teams win on all counts.

At an avionics firm in LA four armed thugs steal a flash drive containing software pertaining to a drone for the US Navy; Sam knows the lead engineer on the drone project; the G team figure out everything and find the bad guys and a child.

During a Marine-sponsored charity-benefit volleyball tournament at Venice Beach, a car bomb explodes, killing two and injuring 29; promptly an aggressive TV reporter, Dana, says on the air that, according to sources, an Iran-based Islamic militant group, the JLF, is responsible for the bomb. One honcho at the DoHS firmly denies that the JLF is responsible; G and Sam lean on Dana, who gives a name; Eric finds another lead; Eric and Nell exchange notes; Kensi and Deeks chat with a man who believes in alien creatures who watch everyone; G and Sam make a productive stop at a car-rental shop; Kensi and Deeks learn some disturbing news; Dana dies, and Sam collars her killer, Bakri Deng, from South Sudan, who first refuses to cooperate; Kensi and Deeks learn about Deng, and Eric and Nell learn even more; G and Sam find the truth and an explanation, then, with Deng's help, they intervene with two other bombs and bombers and neutralize them. The foursome also receive love notes.

While investing the death of a missing submarine officer, which first resembles a suicide, the G team find conflicting clues and other evidence; G and Sam discover a distinctive vessel, they board it, and it gets underway. [Continued.]

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 the team tries to locate and save Callen and Sam and prevent the terrorist attack.

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, Hetty is under investigation in Washington, D.C., when the Department of Justice arrives in L.A. to investigate the team.

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.

The team goes beyond boundaries to make sure Hetty is safe but what they don't know is that Hetty has her own plan as always. Meanwhile Nell is having a hard time after having killed for the first time and is visited by a know face who might be able to help her.

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. Anderson Silva guest stars.

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.

When Granger gets into a car accident, and the team finds that it was intentional, Hetty locks down Ops in order to find the mole and believes that the mole is close to home.

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. Kensi and Deeks are given the chance to get even closer to each other.

Calllen's routine operation becomes anything but. Posing as a mailroom clerk in order to get close to a suspected arms dealer, he becomes a hostage when terrorists take over the office.

Callen and Sam are sent covertly to the U.S. Consulate compound in SFAX, Tunisia to collect and retrieve key evidence after an assassination attempt on an U.S. Ambassador.

In hope of identifying the source of an anthrax poisoning before it can be used as a weapon, Sam and Callen go undercover as food truck owners.

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.

On what is supposed to be a routine op, Sam takes a bullet and the team sets out to find who the shooter was; Kensi and Deeks have their first argument and Kensi starts to think they may be moving too fast.

An afghan soldier who was in training in the U.S. is killed.

After a successful sting, an explosion claims the lives of three FBI agents; Kensi and Deeks realize their secret is out.

The team searches for those responsible when a missile test is hijacked; a young computer specialist assists the team.

Callen and Sam continue their undercover mission to take down a white supremacist group that it's believed to have procured nuclear material, while Kensi poses as Callen's tattooed biker girlfriend; the moment Callen and Hetty first met is revealed.

Callen and Sam are surprised when a murder victim turns up alive and wants their help. The NCIS OSP team investigates and finds that someone has broken the rules of sanctions against Russia. Arkady's in trouble again.

Kensi faces hard memories from her past.

Dead Crew members turn up from the missing tanker involved in Arkady's deal with Russia. Arkady's connection to the ship is revealed.

An ongoing case leads Callen, Sam, Deeks, and Kensi to Moscow, where the team must assume multiple undercover identities to locate their suspects. Also, Callen uncovers new information regarding his father.

Season 7 begins with Callen going rogue and embarking on a secret mission that leaves Sam and the team in the dark. Hetty demands his operation be shut down and that the team intercept him before it's too late.

DEA agent Talia Del Campo seeks help from NCIS after her partner is murdered. Meanwhile, Kensi grows suspicious that Deeks is hiding something, but he surprises her by introducing her to his mother.

The NCIS Los Angeles team investigates a 20-year old Peruvian massacre after a well-known fashion model, believed to be one of the survivors, is now a potential target. Also, Kensi goes undercover as the model's assistant and Deeks as her chauffeur.

Callen and Sam receive a cell phone on their day off and the caller threatens to kill innocent people if they don't do as he says.

The team helps NCIS agent Tony DiNozzo track down a money launderer who escaped just before being brought into his custody.

The team searches for Sam's former partner, Ruiz (Anthony Ruivivar), who disappears while buying a deadly explosive during an undercover operation.

Kensi and Deeks go undercover as cult members to rescue a former Department of Defense employee brainwashed into revealing classified information, as the rest of the team works to prevent the cult from selling the government secrets.

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.

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.

Kensi and Deeks go undercover at a decommissioned nuclear power plant where a Gunnery Sergeant moonlighting as a security guard was poisoned by radiation.

The team investigates the murder of a tech entrepreneur turned venture capitalist who secretly developed a computer program that allows for undetectable data collection.

When Kensi and Deeks announce that they're moving in together, Hetty sends them both to protect a witness, which happens to be Kensi's ex-fiancé.

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. Part one of two.

In Russia, Callen, Sam and Anna hatch a plan to break Anna's father and his CIA companion out of prison.

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. Ella Thomas guest stars.

The team is shocked to learn that Anna helped a convicted Cuban spy escape U.S. custody before he was to return to his country in a prisoner exchange.

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.

The team searches for a North Korean spy while they're assigned to protective detail for the commander of the Pacific Command.

After Operational Psychologist Nate Getz (Peter Cambor) 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 (Malese Jow) 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.

Sam receives a distress code from his son that his school has been taken over by a group of extremists, so the team heads to San Francisco to save the hostages.

The team travels to Syria to capture a High Value Target, but someone gets hurt when the mission goes awry.

The team travels to Syria to capture a high-value target, but the mission goes awry when their chopper is shot down, leaving Kensi badly injured and the rest of the OSP team must work around Duggan to ensure they get out alive.

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 saves a lieutenant commander's life, the team discovers his dark past that places a local teenager in peril. In the meantime, Sam must decide who to take to the football game.

Callen goes undercover as a patient in a mental hospital to find an NSA agent who vanished while pursuing an ISIS attempting to cross the border.

When a graduate student developing an electromagnetic weapon for the Navy is attacked, the team uncovers a link to international warfare.

Callen is forced to interrogate his father when he's found in an NCIS patient's hospital during a radiation poisoning case. In the meantime, the team discusses their plans for Thanksgiving.

The team gets a new lead in the ongoing mole investigation when two men disguised as Sheriff's deputies are killed in front of Callen's home. Meanwhile, Nell visits a prison inmate who's withholding information about the department leak.

The team celebrates the holidays as they investigate the disappearance of a Navy Lieutenant Commander who's working with the NSA on foreign cyber threats.

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 and an agent is kidnapped by the mole.

One agent is held in an unknown location and being tortured by the mole, while another is betrayed by someone unexpected.

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.

Nell and Eric go undercover at a couple's retreat when the Treasury Department is hacked and the crime is linked to a tech-savvy husband and wife.

Sam and Callen board a flight to Tokyo posing as businessmen to trail an engineer trying to sell schematics for a missile destroyer.

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.

Hetty's old colleagues from the Vietnam War partner with the team when a Navy Captain kidnaps a corrupt Veterans Affairs administrator.

The team works with Hetty's old Vietnam War colleagues on a gold heist investigation.

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

Sam Hanna goes rogue from the NCIS team in an attempt to stop Tahir Khaled from ever targeting his family again.

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.

As Granger escorts Jennifer Kim (Malese Jow) back to Los Angeles, he interrogates her regarding a North Korean spy and she admits to knowing he is her father.

Kensi and Deeks go undercover at a decommissioned nuclear power plant where a Gunnery Sergeant moonlighting as a security guard was poisoned by radiation.

The team works with Hetty's old Vietnam War colleagues on a gold heist investigation.

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

One agent is held in an unknown location and being tortured by the mole, while another is betrayed by someone unexpected.

The team travels to Syria to capture a high-value target, but the mission goes awry when their chopper is shot down, leaving Kensi badly injured and the rest of the OSP team must work around Duggan to ensure they get out alive.

Deeks is away to testify in court, so Granger teams with Kensi. A gang stop an armored truck, attack the crew, and steal the cargo, consisting of 100 gold bars, valued at $70M, en route to the People's Bank of China; footage abounds; Callen and company investigate. G and Sam find a dead clown, and Nell IDs him; G, Sam, and Kensi find three executed thieves; Kensi talks with the girlfriend of the sole surviving thief (Welch), then she, G, and Sam find Welch's body, and Kensi finds the gold; G and Sam check the gold, which is not gold. Hetty comments to G in private that this case involves more than just catching a thief; Eric finds a pair of anomalies; G, Sam, and Kensi check out a new firm, where they see clues and overcome three bad guys; Eric describes the facial-recognition hit on one of the guys, which lead the team to conclude that the case is not merely a heist but rather a state-sponsored economic terrorist attack on the financial infrastructure of the USA.

Callen goes undercover as a patient in a mental hospital to find an NSA agent who vanished while pursuing an ISIS attempting to cross the border.

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.