A Marine is found in an alleyway bleeding out from his eyes, ears and mouth. The team must determine whether he was the victim of a bio-agent and who killed him.

At 02:15 one morning a Navy lieutenant (j.g.), Brian, with two gunshot wounds, in a car not his own, drives into a canyon from Mulholland Drive in Los Angeles, then dies; Callen and company, including Deeks, investigate; Deeks has a couple of awkward moments; the team pick up several clues about the circumstances of the preceding night, including Aubrey, a young socialite woman. Kensi and Deeks speak with Aubrey's stepfather. G, Kensi, and Deeks go nightclubbing; Kensi discovers an alive missing girl, and she says that a victim just became a suspect; the team meet several interesting people; Kensi decks one and cuffs him, and G pops another one; the team escort away Aubrey, who gives Kensi much useful information. Kensi and Aubrey go to the latter's home, where Kensi sees more clues, more people, and a part of a solution; Aubrey leaves, Kensi gets into trouble, and G, Sam, and Deeks ride to the rescue. The team finish putting together the pieces about the death and more.

Deeks disappears while on an undercover assignment for the LAPD; Hetty offers help, so Callen and company lend a hand; Eric follows a trace to a Serbian bad guy; Deeks shows up and solves the case, and the team get him out of a tight spot.

In Cyprus an NCIS agent dies by murder; the killer lands at LAX, and G grabs and questions him and obtains information through a deal; G infiltrates the hit squad for the next lethal action; the team solve the puzzle and nab the bad guys.

On state-owned property near Imperial Beach, California, south of San Diego, while four Marines patrol the area (along the US-Mexico border) to support federal customs and immigration agents, unknown people for unknown reasons ambush the Marines and their Humvee; one escapes, and three remain missing; officials wonder whether the intruders are Mexican smugglers; Callen and company investigate. A search party finds the body of one Marine; the lone survivor says that one of the missing is a pregnant lance corporal, and the dead one was the father; a snitch gives a tip to G and Sam, the latter of whom checks it out while playing it cool; Nate suggests an alternate possibility; while Kensi and Deeks take a bike ride, they find something but run into trouble; G and Sam get a lift and lend a hand, then they find evidence confirming Nate's idea. G and Sam put it all together, so they confront the bad guy in charge. Nate prepares for a journey.

In a parking garage on Rodeo Drive in Beverly Hills, California, near Los Angeles, two shoppers find the body of a man less a crudely severed hand, which is missing; the victim was a Marine corporal, stationed at Camp Pendleton and assigned as a clerk in the G2 (intelligence) office with a top-secret clearance; Vance has expressed interest, so Callen and company investigate. Nell, an enthusiastic new analyst who finishes the sentences of others, has arrived for duty. Eric and Nell see a clue about the amputation; the musketeers conduct interviews; Eric and Nell find more clues; G and Sam find a body and another severed hand; Kensi, Eric, and Nell follow a trace to a Muslim jeweler in Beverly Hills; G and Sam start toward a lunch but bump into the jeweler and some friends; Kensi and Deeks meet the jeweler's wife and find a bloody knife; Sam adds a factoid; the team seek and find the real killer and the rest of the story. Kensi arranges to make a special delivery.

The 14-year-old daughter of a Navy commander is kidnapped and buried alive. The FBI and the team investigate an incarcerated serial killer with an identical MO. Sam's past helps him empathise.

In downtown LA a lone armed woman seizes a Navy recruiting station; G recognizes her as his former partner while undercover for the CIA; she asks for his help and gets it; the team find the bad guy responsible plus the rest of the story.

Two men, a Marine reservist and a plastic surgeon, die by gunfire, and a woman disappears; Callen and company investigate; Eric and Nell provide clues, and the team go to a party, where they grab the bad guys and prevent any damage.

A sergeant first-class retires from the Army, the day he becomes a civilian he is kidnapped. When his tortured body is found, the team must determine the reason behind the extreme cause of death.

In Hollywood two men ambush a limousine and shoot the occupants to death; Hetty says that the target, Renner, was a Swiss antiques dealer and black marketeer; she persuades the LAPD to allow her to take over the investigation because of the nature of a little black book, which she believes is the object of the activity. While Hetty visits a man in an assisted-living place, G and Sam visit Renner's pad, which someone has tossed; Eric identifies a man, Lee, who appears in a number of photographs around Renner's house; G and Callen visit Lee's office and break up a meeting; Eric says that Lee's two visitors are German "agricultural attachés" (that is, spies); G and Sam question a retired operative, and Kensi and Deeks also search Renner's pad, where they meet two foreigners with alternate identities; Hetty visits the Hollywood Bowl, and the four musketeers rescue her. Hetty again calls on her elderly friend, whom she finds dead, executed by gunfire. [To be continued.]

Intrigue and violence continue while several parties search for the "little black bloody book". The team investigates Cole's shooting and find a link to the murder of a cop during a traffic stop.

The team must piece together events when a recently discharged Navy lieutenant, and intelligence officer, with PTSD witnesses a shooting.

While Rose does an autopsy, two intruders blow away her assistant and steal the corpse and a van; she calls the Callen team, who investigate because of an apparent Navy connection. The team slowly figure out the puzzle.

The Pentagon discovers a breach after an online transfer of a file containing highly classified information. The team races against time and other interested parties to find the leak and retrieve the file.

Inmates initiate Moe by beating him inside a federal prison; Sam goes to him and undercover; Kensi and Deeks find a device and a plan; Hetty says there's more; an escape takes place, Sam loses someone, and a larger plan moves on. [Cont'd.]

Inside his pad by night G grabs a prowler, who works for Arkady, who gives G a tip; Kensi and her buds run a scam on a foreign businessman; G gets into a firestorm, but the rest of the gang show up and lend a hand.

Callen and Sam go undercover as motorcycle cops to investigate corruption within the force. When their contact is murdered they take on a job in hopes of catching his killer.

While Deeks follows his morning routine, during what appears to be a holdup of a convenience store, a gunman shoots him twice in the chest with a pistol; Deeks goes into surgery; G and Sam investigate at the scene; Kensi waits at the hospital; Eric and Nell prompt their computer. The team realize that two bad guys had staged the supposed robbery as a deliberate ambush; Eric traces the suspects' car to the hospital, where G and Sam see it and engage them; the driver dies, and the other man escapes but winds up at the boat shed. The team set up G for an undercover meet; while talking with Kensi, Deeks suggests a dangerous idea; Kensi tells Eric that G's walking into a trap; Kensi dashes off to the trap, and Deeks suddenly figures out who's the real target; G and Sam tear back to the hospital, but they arrive late, for the party has already ended. The team put all the pieces together. Hetty brings Deeks up to date on his next of kin.

One of Sam's aliases receives an invitation to Yemen to meet Abdul; Hetty hopes that Abdul will lead them to Saadat, Abdul's brother, believed to be a leader of terrorists; G and Nate provide backup; the team support, and it all works out.

A Latino day laborer dies, and a lieutenant commander in Naval intelligence disappears; Callen and company investigate; G and Sam find evidence suggesting an assassination plot against a visiting Venezuelan politician; the team thwart it.

When a secure facility on a military base is compromised, Kensi goes undercover to find out what the world-class thief was intending to steal.

A major player in the private-sector aerospace industry dies inside a test chamber at his facility; Callen and company investigate; Eric goes undercover as an FAA inspector; a big bang occurs; the team grab the bad guys at a flea market.

After a key witness, Ray, testifies in a federal arms-trading prosecution, he retires as an informant; the team give him a new identity, Charlie, and direct him to a new location; next Callen and company turn their attention to the missing military weapons; however, within two hours Charlie disappears after a shooting in Los Angeles; Deeks goes back undercover while the other members check out the scene. Kensi and Deeks chase around with Ray; a firefight breaks out, and Kensi takes out one shooter, but Ray disappears again; G and Sam seek entertainment and find some, then the gang take Ray's estranged wife to the boathouse, where she talks, where she and Deeks reminisce and catch up with each other, and where Deeks eventually makes a confession; G and Sam make Ray a special deal involving his pregnant honey. During another firestorm the musketeers run a scam on the executioners and therefore on the new convict in a federal prison.

An unidentified man dies after a beating and a burning; a specific radiopharmaceutical in the body implies a connection to a previous case; Callen and company grab the bad guy. Hetty resigns, disappears, and reappears in Prague. [Continued.]

Hetty turns up in Prague and proffers a message. G and Sam investigate; Eric and Nell help. G, Sam, Kensi, and Deeks go to Prague, find a lead, and follow it to Romania, where G has a flashback, and Hetty delivers the message. [Continued.]

In a beach town on the Black Sea in Romania, G, Sam, Kensi, and Deeks check out the neighborhood while Hetty chats with the head of the Comescu family, who describes a connection to G. The team shoot their way into a house and save Hetty.

In Beverly Hills two masked thugs kidnap a wealthy and successful software developer; Callen and company help the National Security Agency; the team find the pieces and put them together, then they find the missing guy and the bad ones.

A Marine staff sergeant dies in an explosion of an SUV; Callen and company investigate; Hunter makes changes; Sam and Deeks find a runner and a bomb; the team find the bad guy; three more bombs explode, but the gang escape; Hetty returns.

On the oceanfront at Venice, California, in the Los Angeles area, an unknown gunman kills a TV journalist, Adriana Gomez, who has received death threats from Libyan nationalists (after she created a series of stories about an anti-Qaddafi rebel and folk hero); Gomez contacted a commander, Gavin Madison, in Naval intelligence, who's an expert on Libya; Callen and company investigate. G and Sam visit Cdr. Madison at home, find two bad guys, exchange fire, and drop one and lose one; Kensi and Deeks visit a Libyan restaurant and get a lead; G and Sam check out a defunct auto-glass shop, where they find a large clue; Kensi and Deeks, along with G and Sam, rediscover the loose Libyan; G and Sam find also a body in a trunk; Sam goes shopping for a lamb, and G, Kensi, and Deeks pitch in; they meet people and deal with them. The team figure out the puzzle and create a solution, which includes Sam's making announcements. Hetty tells G more about his ancestors.

While raiding a pawnshop, targeting a Mexican drug cartel, LAPD cops kill two cartel grunts plus a wanted Muslim terrorist; the LAPD requests help from Callen and company, who seek, find, and scrub an alliance between the two rogue groups.

A woman former lieutenant commander in Naval intelligence dies by gunfire; Callen and company find confusing and conflicting clues, but they put all the pieces together; Hetty again visits an old friend but says that she arrived too late.

A separated Marine attacks and beats a Japanese man tourist, who dies later; Callen and company investigate; the Marine tells a long story, which eventually becomes confirmed; the team, using extreme tact and discretion, achieve their goal.

The team are sent to the Mexican desert when a Naval Seaman is murdered over a mysterious box.

The CIA loses contact with Sam in Sudan with a CIA task force; two CIA agents die, as does a third one; G goes to Khartoum and lends a hand; the gang in LA help, and they find and deal with a mole; G and Sam return to LA and take a friend.

During a sting Deeks appears to blow away an unarmed bad guy; Hetty fires Deeks after the LAPD cuts its ties with the NCIS; Kensi belatedly learns about a ruse; the team and the LAPD together find a mole, the bad guys, and some explosives.

At a college a man steals an experimental electromagnetic-pulse weapon, which has the capability to render disastrous damage; Callen and company investigate the theft and a second one, and they figure out the case and provide a resolution.

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.

Both Alex and Jada, from Sudan in a previous episode, have reappeared in Los Angeles; while two NCIS agents (on a protective detail) escort Jada to an office in preparation for her giving a deposition, a masked man in an SUV attacks the trio in their car and escapes without injuring anyone. Kensi and Deeks get a name from Jada, then check a warehouse and catch a bad guy; Alex and his family disappear; Sam offers to play water games; Nell finds Alex, then the foursome chat with him; his behavior perplexes everyone; Kensi and Deeks visit an international business firm, from which they acquire important data; Alex finds the gang, surprises them, and chats them up, then they all pitch in and change their plans. Alex calls the main middleman and proposes a deal, which blows up; Alex gets his family back, and the gang keep Jada but lose the middleman, although another agency catches him later.

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.

In LA a man survives gunfire while trying to enter the Vietnamese consulate; G and company investigate; the victim's personal effects include the name of a Marine first lieutenant; the team save lives, solve the case, and reunite a family.

A group of Marines find the dismembered body of a Navy ensign; Callen and company investigate; circumstantial evidence points to a SEAL, but Sam refuses to believe; Sam, a SEAL, hears the whole story; Callen learns the cause of death.

A bomb explodes in the bed of the pickup truck of a Marine former second lieutenant; he runs; FBI agents bust him; Granger wants to find out why the team did not previously know about a terrorist plot in the LA area; they figure it out.

G and Sam return from an investigation in Honolulu; Danny and Chin, of Hawaii Five-0, accompany them; they seek to intercept a rogue epidemiologist with smallpox virus; the team figure out the case and prevent an unimaginable disaster.

Kensi and Deeks go undercover as a married couple housesitting in a gated community to identify a Russian sleeper agent believed to live in the neighborhood; a Russian businessman, who's also a link to the unknown agent, dies at a local hotel. G and Sam visit an old Russian friend of G, and Kensi tries to visit an aged neighbor; they all get reactions; Eric finds a lie, so Kensi sniffs around and finds herself in a chick fight; the other girl agrees to tell all, but she too dies; still, though, she gives a Russian name, and she says that he is nearby. G and Sam return to Arkady to find out why he lied; they find the dead body of Arkady's bodyguard plus two men trying to kill Arkady; Kensi and Deeks go to an interesting dinner, and Sam shows G a disturbing image; on the way home Kensi and Deeks run into trouble with a gay couple; however, they discover the Russian long-time sleeper agent, who recently became active. The team finish putting the pieces together.

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".

In Afghanistan a terrorist avoids a drone strike, but a discharged Marine dies; G and company investigate; Eric and Nell learn about more unaccounted former servicemen; the foursome go to Dubai and beyond, where they work out everything.

Four men die in an explosion of an otherwise empty diner in Pasadena; all four took part in a program of the Office of Naval Intelligence; the fifth participant, who's someone else, survives; two more die; G and team figure out all of it.

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.

Sam receives a call at home. A former colleague is in trouble that might have connections to a past case.

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 man stops an ambulance, kills the EMTs, stabs the patient, and removes an object from his chest; the victim was a civilian scientist working for the US Navy; G and Callen put the puzzle together and find both the killer and the object.

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.

An NCIS agent dies aboard an aircraft carrier at sea; the fearless four, undercover, fly to the ship, where they meet even more problems, but they eventually solve the crimes; Hetty joins them for Christmas underway; Nell catches Eric.

At 03:06 Deeks receives a call from a woman, Jenny, in two of his past lives; she tells about a ring stealing luxury SUVs and shipping them to the Far East; Jenny disappears; the team solve the puzzle, grab the bad guys, and rescue Jenny.

Two weeks ago a Marine lieutenant, Edwin, died in Afghanistan; the local civilian coroner has done an autopsy by the request of the widow, Antonia; she also has hired a private investigator, Stuart, to look into the circumstances; last night someone killed Stuart by slitting his throat; Callen and company investigate. G and Sam meet Antonia, who describes her suspicions about a cover-up; Rose, a medical examiner, explains about the harvesting of tissue, but Antonia objects, saying that Edwin was not an organ donor; Edwin's file has disappeared from the coroner's office. Nate shows up at Hetty's request. Rose becomes a person of interest, and Hetty sends Nate to question her; he takes her to the chat room at the boathouse; a picture begins to appear; Hetty and Nate visit a funeral home, as do G, Sam, Kensi, and Deeks, and they grab the head man; the team finish figuring out the whole thing, and they attend a burial with military honors.

A passenger in a van shoots an LAPD cop, who shoots the driver, then the passenger speeds away; the driver was a Chechen-American with ties to a terrorist network; G goes undercover and into trouble; the team solve the case and rescue G.

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.

Dean, a fugitive terrorist who disappeared in 1973, stumbles in from a woods, collapses, and dies of a stab wound; G and company investigate; the team find the pieces and fit them together; they find also explosives and one more bad guy.

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.

One Russian kills another in the LA area; G and Sam quiz Arkady; Sam and Michelle go back undercover for the CIA; Sam lands in jail, and Hetty leaves him there; Greshnev dies, and Sidorov disappears; Hetty says that this is far from over.

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.

During a birthday celebration, 2 sailors and a dancer are poisoned in a bikini bar. When a radical Muslim group appears to take credit for the attack, the team must determine whether there is any truth to the claim.

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.

Monica becomes the target of an unknown shooter in Hollywood; Deeks, in an undercover role as Max (at the direction of Granger), rescues her; Monica is a hostess at a nightclub, which is a property of a South African who's now a legitimate businessman, but who previously worked as an international dealer in illegal arms. G and Sam visit the club, and Nell identifies the shooter as Pieter, an enforcer from South Africa; G and Sam take a different tack with Pieter, so they meet him and take him to the boathouse; Max has an unusual short-term relationship with Monica, who steals blood diamonds and shows them to Max, then both she and the stones disappear, but Kensi and Deeks find her and them. G and Sam chat with Pieter, who reluctantly talks; Kensi and Deeks chat with Monica, who agrees to cooperate; the team monitor an exchange, minimize the damage, and grab three bad guys; later Kensi and Deeks get something clear. Granger never shows up.

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.

Sam insists Callen find a new partner while a threat of a North Korean attack looms.

The NCIS team partners with a member of the Secret Service to stop importation of very high quality counterfeit currency from Peru.

The team is assigned to investigate the murder of a U.S. Navy lieutenant.

Sam expresses his trust in an old acquaintance, but is it justified, with a LOT of guns around, and, of course, some deaths? Meanwhile A.D. Mosley shows what she is worth.

Sam goes undercover as a day trader after an investment banker who has ties to Russia is murdered.

LAPD Detective Whiting (Karina Logue) calls in a favor from Deeks after his former partner, LAPD Lieutenant Bates (Patrick St. Esprit), goes rogue and only Deeks can bring him in.

Kensi is transported to a missile launch facility to help thwart a takeover of nuclear weapons.

The team must find assailants who illegally crossed the border and attacked Border Patrol officers and illegal aliens; Homeland Security sends Nell's older and bossy sister to assist with the case.

Callen and the team question Joelle's backstory after she escapes from a kidnapping and turns to Callen for help.

A Brazilian diplomat is targeted by a skilled mercenary who holds a grudge.

The team investigates a ransom-ware attack that's taken out the whole power grid for Western Los Angeles.

When napalm is discovered at a crime scene, the team investigates the only casualty for possible links to terrorism.

While Hetty is being tortured by her captors in Vietnam, Eric and Nell find a clue to her whereabouts, prompting the team to organize a rescue mission with very little information. Carl Lumbly and John M. Jackson guest star.

The NCIS team joins Hetty's old friends from the Vietnam War in an off-the-books rescue mission to save her from her captors.

Callen and Sam pull Jennifer Kim from witness protection to help the team find an underground spy with an arsenal of bomb materials.

Callen's father is apprehended as part of an exchange for two American photographers being held hostage in Iran.

The team investigates a missing person's case and uncovers a killer who puts on shows for high-paying voyeurs.

Callen and Sam join forces with the ATF when a notorious international weapons dealer returns to the States.

Sam and Hidoko go undercover when a cryptocurrency farm is robbed of over $10 million in Bitcoin codes.

Callen, Sam and Nell head to the Angeles Forest to find pieces of a failed rocket launch, including a top-secret government device.

The team and the FBI team up while investigating a soldier's death.

NCIS investigates the murder of a prison inmate who was the adopted daughter of a notorious counterfeiter. Also, Callen is summoned by the (ATF) Internal Affairs board to discuss Anna's actions during a joint NCIS and ATF case.

During a battle with a cartel, Sam is shot. A suspect reveals information about Spencer Williams.

The NCIS team go all out to rescue a team member and kidnapped child in a daring mission on foreign soil.

Callen, Sam and Kensi, along with an unconscious Deeks, search for a safe way out of Mexico, while a cartel boss places a bounty on their heads.

A prototype tactical assault suit is stolen from a Navy base and used in a jewelry heist; the team must determine who stole the suit and what their next target is; retired Navy Admiral Hollace Kilbride temporarily oversees the team.

Callen and Sam are assigned to protect a deputy prince whose decoy is assassinated.

The team is in danger when their pictures are included on a cartel hit list.

Deeks is worried for informant Tiffany Williams when she is arrested during an undercover.

The team gets called in when Mosley becomes a person of interest in the murder of a cartel hitman, and they must track her down before she crosses the line - and without the special prosecutor knowing.

The team partners with the State Department after the murder of an arms dealer is connected to a series of crimes that appear to be done by someone with elite forces training.

Deputy Director Ochoa volunteers the NCIS team to assist with a covert operation tied to a terrorist group advocating for extreme military force.

The NCIS team investigates the home invasion of Navy Captain Dean Hadlow, who was entertaining his friend, General Omer Abidi of Pakistan, when robbers successfully stole money, jewelry and highly classified information. Meanwhile, Deeks and Kensi interview candidates to manage the bar.

The team investigates a corrupt consulting firm after there is an elaborate bank heist to steal a single safe deposit box held by the company.

The team searches for a Marine reservist with a history of PTSD who disappears after a drunk and disorderly altercation.

The team investigates a possible terror threat after the chief of logistics for a naval weapons station collapses on the job. Deeks and Kensi research different honeymoon locations.

The team works with the Global Criminal Tribunal when a Syrian seeking justice is brutally attacked while delivering evidence that would prove chemical weapons were used on civilians.

The team partners with the FBI to locate a terrorist cell in Los Angeles believed to be prepping for an imminent attack.

As the team continues to search for a terrorist cell in Los Angeles, Callen and Sam remain trapped in a movie theater after multiple bombs have detonated and every remaining exit is wired with explosives.

The team investigates the murder of a journalist who was writing an exposé on a mishandled classified military operation. Also, as their wedding day quickly approaches, Kensi and Deeks work on the last remaining items on their to-do list.

After months of planning, the NCIS family celebrates the wedding of Kensi and Deeks.

Nell's sister Sydney comes to her for help when her high school crush gets mixed up in a Russian plot to steal intelligence from the Department of Defense; Special Prosecutor John Rogers conducts mandatory performance reviews with the team.

Sam assists a Department of Justice agent with locating a former U.S. border patrol officer who disappeared after the cartel threatened him; Kensi partners with a special agent from the Criminal Investigative Department to recover a stolen hard drive with sensitive military information.

Sam vows to personally apprehend the suspect who attacked a Navy Seal moonlighting at a security job for a successful marijuana dispensary.

After Anna Kolchak escapes from prison with her cellmate, Callen and the NCIS team assist with the investigation and try to locate her.

The NCIS team travels to Cuba for an unsanctioned mission after Callen gets a lead on Anna Kolcheck's whereabouts.

Callen and Sam work with Captain Harmon Rabb, the former JAG, who is now the XO on the USS Allegiance to stop ISIS sympathizers from attacking U.S. aircraft carriers.

Callen and Sam work to locate a group of ISIS sympathizers aboard the USS Allegiance; Hetty enlists her friend to help obtain information from a Russian diplomat.

Callen and Sam work with Navy Capt. Harmon Rabb Jr. to apprehend spies aboard the USS Allegiance; Hetty tries to neutralize a missile attack in the Middle East; Kensi and Deeks are trapped in a mobile CIA unit in Iraq while under attack.

Faced with multiple cases worldwide, the team splits up, with Callen and Sam working in Tel Aviv while Kensi partners with Department of Justice Agent Lance Hamilton in Los Angeles.

Callen and Sam run protection detail for retired Navy Adm. Kilbride in an operation to locate a missing naval intelligence officer.

The murder of a Naval lieutenant leads the team investigating a potential ebola outbreak - Callen and Sam check her ship, the USS Allegiance while Kensi and Deeks follow her movements after leaving the ships.

The NCIS team searches for a stolen painting valued at $40 million after online chatter indicates the artwork is being sold on the black market to fund terrorist activity.

The NCIS team reluctantly aligns with two former criminals from England, Ricky Dorsey and Frankie Bolton, after a powerful arms dealer kidnaps Ricky's daughter in an attempt to obtain a dangerous weapons system.

The NCIS team links the theft of an undersea drone prototype to a video game streamer's elaborate party.

After a Navy lieutenant disappears from the scene of a car accident, the NCIS team processes the crime scene and discovers his laptop is missing along with recently accessed confidential information for retired Navy SEALs.

Callen and Sam travel to San Francisco to search for Beale after he's kidnapped during a clandestine mission for Hetty.

Akhos Laos, a former black ops agent originally recruited and trained by Hetty Lange, returns to seek revenge on Hetty for the life she introduced him to.

While the team investigates the theft of a computer virus, Callen and Sam consider their future at the agency, Kensi and Deeks discuss having children, and Eric and Nell analyze the impact of Eric's undercover assignment on their relationship. Also, the team tracks Mara (Arielle Vandenberg), a crooked upscale banker.

CIA Officer Veronica Stephens (Dina Meyer) asks the NCIS team for help when an agricultural engineer Hetty asked her to bring to the United States disappears.

After a rise in deaths caused by black market opioid use, the NCIS team links the street drug to funding for terrorist activities.

"Commitment Issues" - The NCIS team investigates the murder of a Naval warfare engineer at a spoken poetry event. Also, Callen asks Nell to assist him in a worldwide search for Anna's whereabouts.

Anna Kolcheck returns to warn Callen that he is in danger and he must now work with an archenemy to stop an underground trafficking ring.

When Fatima is captured while on a mission and held for ransom, Callen and Sam enlist a deep undercover CIA agent to help get her back.

When an FBI agent is killed while trying to track the location on an undercover agent, NCIS must find the missing agent before the criminals find him.

While NCIS investigates the disappearance of a department of defense officer who was looking into a recent UFO sighting, Anna (guest star Bar Paly) makes a bold decision about her future.

While Sam investigates the murder of an Iranian exile working to overthrow the current regime, he must also try to save Agent Roundtree (Caleb Castille), a new agent who's having an unexpectedly adventurous first day on the job, when he accidently triggers a bomb. Also, Nell makes a decision about her future with NCIS.

The team assists the DOJ in the investigation of an arsonist who targets an FBI agent house that's protecting a political activist seeking asylum; Eric deals with the aftermath of Nell leaving the team.

The team helps a former NCIS tech operator search for her missing ex-partner, whom they fear might be working with the gun runners they failed to take down years ago; Deeks reels when his bar gets a negative review.

Sam, Callen and Rountree travel to Afghanistan to help with a sensitive case after two SEALs claim their chief murdered an unarmed prisoner.

When a Russian bomber goes missing while flying over U. S. soil, Callen and Sam must track it down in the desert and secure its weapons and intel before the Russians on board destroy the plane. Also, Hetty gives Nell a cryptic assignment.

As the trial begins of a Chief Petty Officer who Callen and Sam arrested for war crimes last year, the NCIS team is called to help find the missing star witness.

When Nell sends Sam to meet an informant who plans to blow the whistle on a military secret, Hanna's life is in danger when the man tries to run him down and kill him. Also, Kensi and Deeks debate whether or not to buy their first house.

The body of a murdered Navy reservist is found by thieves in the midst of a robbery, and NCIS must work with the burglars to find the killer; Kensi and Deeks struggle to decide if they are ready to make the leap to buys a house.

To get intel on a matter of national security, Kensi must come face-to-face with a sociopath who has been obsessed with her since she put him in jail years ago; Deeks is desperate to keep Kensi safe, but he is forced to leave NCIS.

Before Christmas, Hetty assigns Callen the case of his former foster brother and his wife, who, upon reentry into the U.S., are framed for smuggling drugs across the border; Deeks is struggling with losing his job at NCIS.

The NCIS team's murder investigation of a man who sold military information leads to the abduction of a doctor whose cutting edge neurotechnology could be developed into advanced weaponry.