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. Written by DocRushing

In Afghanistan one survivor, the target himself, a terrorist, narrowly avoids the destruction of a building by a drone; one victim, however, is a discharged Marine, David, who was a gunnery sergeant in counterintelligence; Callen and company investigate. G and Sam talk with a representative from the Marine Corps, and Kensi and Deeks visit the parents; the father refuses to accept that his son returned to Afghanistan; Eric finds David's circuitous journey from Los Angeles to the Middle East; David's former employer and his girlfriend repeat two different cover stories from David; Eric and Nell find out for whom truly he recently started working; G and Sam visit the office of the new employer and get a warm welcome, then they take the one worker to the boatshed; Eric and Nell also visit the firm, where they learn about more recruits; the fearless foursome go to Dubai and beyond, where they take part in creative deception and work out everything; they safely head back home. Written by DocRushing

An eclectic group of four apparently unassociated men, all invited to a meeting, die in an explosion of an otherwise empty diner in Pasadena, California, in the Los Angeles area; all four took part in a program of the Office of Naval Intelligence, which had recruited high-IQ people to play a strategy game; Mathers, the man in charge of the project, tells G and Sam that a fifth man, Hoffman, did not attend the meeting; at Hoffman's pad Kensi and Deeks find the dead body of someone else while a teenage girl, Astrid, slips away; yet another man dies; the team locate Astrid, and Kensi chats with her on a cellphone; Mathers disappears; the team nab Hoffman, who describes Astrid, then the team figure her out; Nell, while playing a game for Hetty, describes a problem; G and Sam meet an official from the Pentagon; the team find Hoffman and Astrid together, and they finish putting the pieces together, then Kensi gets a new poker partner, and Hetty makes a threesome. Written by DocRushing

In Sherman Oaks, a neighborhood within Los Angeles, a man dies on impact in a hit-and-run traffic incident; a videotape shows that the killing was deliberate; the victim was Clay, a member of the staff of Monica, an atypical candidate running for the US Senate; Granger and G agree that, if the death is related to the campaign, then it's a matter of national security, so Callen and company investigate. Kensi and Deeks visit Clay's pad, where they find a clue; G and Sam visit the campaign headquarters, where they chat with Monica, and where a campaign worker hands them a disturbing clue; Kensi goes undercover as the replacement for Clay; Eric and Nell find a lead, and G and Sam pursue it; Kensi goes with Monica into the field, where a sniper opens fire; Kensi puts Monica on the deck; Monica decides to withdraw; Hetty takes a fresh look at the circumstances; the team figure out the puzzle, and Kensi nails the person responsible; Monica resumes her campaign. Written by DocRushing

At 03:09 one morning Sam answers a call for help from Frank, a former fellow agent at the CIA; Sam goes to Frank's pad, where he finds him dead of hanging, and where G, Eric, Kensi, and Deeks join him; he also finds a poodle; G and Sam meet Megan, who appears not to be a flight attendant; Megan fills them in; the medical examiner finds and turns over to Sam an encoded message which Frank had intended for Sam, who begins to process it; Kensi and Deeks go to a dog show and cuff a suspect, Robert, whom they question at the boathouse; G and Sam visit his parents; afterward they take part in a gunfight, then they talk more with James, the father, who, after persuasion and compulsion, tells an extreme story and shows evidence; G and Sam figure out more; Sam finds the decoder ring, then Eric decrypts the message, which is a list of names; the team realize the significance of the implications of the results of their work; Hetty calls the FBI. [To be continued.] Written by DocRushing

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. Written by DocRushing

An unknown man stops an ambulance on an emergency run, shoots to death the two EMTs, stabs the patient, and removes an object from his chest; a bystander, Lance, captures the attack with a smartphone; some of the footage shows up on a website; the victim, Kevin, was a civilian scientist who had worked on a highly classified project in surveillance technology for the US Navy. G and Sam check out Kevin's pad and continue to a golf club, where they find the body of a surgeon inside his car; Kensi and Deeks check out Lance's pad. Eric and Nell learn about Semih, a Turkish diplomat who arrived in Los Angeles this morning, and who has connections with a network of Iranian intelligence agents, one of whom specializes in surveillance technology; G and Sam trace Semih. Kensi and Deeks find Lance, who eventually cooperates; the team complete putting together the pieces of the puzzle, then they go to a ceramics studio, where they find both the killer and the object of interest. Written by DocRushing

A retired CIA agent, Potter, dies when a cigar lighter explodes at his posh beachfront house in Malibu, California, near Los Angeles; Callen and company investigate because Hetty requests the case; since retiring, three years ago, Potter made much money by advising movie directors and video-game creators, drawing on his experience with the agency. G and Sam, realizing that something is up with Hetty, check out Potter's pad, where they meet Kensi and Deeks, and where they all find interesting clues; G and Sam check out two chicks, one of whom is dead; they chat up the other one, who talks; the foursome find a bad guy but lose him; both Hetty and Granger disappear; G and Sam forge ahead in defiance of official orders; they find another body and a booby trap, and Sam finds an old friend; then G and Sam, along with Kensi and Deeks, find Hetty, Granger, CIA agents, a gunfight, the bad person behind the entire mess, and the explanation for it. Written by DocRushing

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. Written by DocRushing

The NCIS special agent afloat, Niles, aboard a fictitious aircraft carrier, USS Van Buren, dies of blunt-force trauma to the head aboard the ship in the Sea of Japan; one possible suspect is in the brig due to a fight in the crew's mess on the same day as the death; the fearless foursome fly to the ship aboard a CoD aircraft; G poses as the replacement for the dead agent, Sam as a Navy commander, Kensi as a Marine major, and Deeks as a computer contractor. Deeks gets into trouble but sees that Niles died elsewhere; the command master chief petty officer displays alarming behavior; the entire team chases a cocaine problem while more trouble brews; Deeks finds a pair of valve handwheels and runs into another problem; the whole team, including Eric and Nell, finish solving the crime. Hetty arrives aboard for Christmas, but Sam returns to Los Angeles in the back seat of a Super Hornet; Nell catches Eric under the mistletoe, then they head out in their tights and ears. Written by DocRushing

At 03:06 one morning Deeks receives an unusual phone call from a woman, Jenny, in two of his past lives; she tells about a ring involved in stealing luxury SUVs and shipping them to several places in the Far East for use as paramilitary vehicles in terrorist activities; Callen and company investigate; Jenny disappears. G and Sam check Jenny's minivan while Kensi and Deeks meet Talia, Jenny's estranged daughter; Kensi and Deeks get new jobs, as do G and Sam; Talia later tells what she did not tell at first; Kensi steals a Bimmer, and G chases a bike; Kensi puts on a good show, but she gets into bad trouble; Deeks helps a bit, then he too slips into trouble; G and Sam soon arrive, so the four of them, working together, not only clean up the mess but also get the head man running the overall operation; the team rescue Jenny. Hetty allows the SUVs to proceed to Asia but only after the installation of a number of significant aftermarket capabilities. Written by DocRushing

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 Henny'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. Written by DocRushing

An LAPD cop stops a rental van for a noise violation; he asks to see the cargo; the passenger from the van shoots the cop, who shoots and kills the driver, who also falls to the pavement, then the passenger jumps back into the van and speeds away; the dead driver was a Chechen-American with known ties to a terrorist network. Kensi and Deeks start with the rental agency; G and Sam do so with the cop, who survived due to his vest; the dynamic duo directs the fearless foursome to the abandoned van, where they find residue of ammonium nitrate; next they do a stakeout, which produces clues; then, with the help of Kensi and Deeks, G makes a swap and goes undercover; he meets a contact, who takes him to a meeting, where one member of the group executes another; G shares a pizza, writes a letter, and dons a vest of a different type; a woman member of the cell commits suicide; the team figures out everything and rescues G from what would otherwise have become a certain death. Written by DocRushing

In Reynosa, Mexico, an elite US joint special-ops team makes a raid to capture Luis Cisneros, who has taken over the Molina drug cartel, and who has cooperated with the Hezbollah; due to a leak, however, the team walks into an ambush; Granger tasks the Callen team to pinpoint the breach. Eric and Nell narrow the field of suspects to a group of civilian tactical role players (TRPs), who, under Inman, posed as the bad guys during the drills to prepare for the raid; the fearless foursome go undercover as another elite team to become close to the TRPs; during the first exercise the TRPs kick the team's tails; the second drill becomes real, and one TRP dies. Granger takes Inman to the boatshed, and G and Sam realize that Granger and Inman share something in the past; Nell goes into the field to do some work, and the others lose contact with her; she gets into trouble, but she defeats her captor; the team put all the pieces together and grab Cisneros, and Nell accepts an apology. Written by DocRushing

A video crew, while seeking Bigfoot in a national forest, see Dean, a wanted leftover fugitive terrorist who disappeared in 1973, and who now stumbles in from the brush, collapses onto the ground, and dies of a stab wound; Dean's old organization, the Gun Barrel Party (GBP), has posted a manifesto, in which it declared its intent to reemerge from the shadows to attack institutions of American injustice; because the GBP is a matter of national security, Callen and company investigate. G and Sam visit a federal prison while Kensi and Deeks stroll through a woods, find a cabin, and meet a woman; G and Sam visit a professor, Hale, who says that he's writing a book about the GBP; Kensi and Deeks return to school, where Deeks finds a bomb; G and Sam check Hale's house, where they too find a bomb; Nell tells about missing explosives; Eric figures out who Hale is; G and Sam grab Hale and dynamite; Hale fills them in, the team connect the rest of the dots, and the GBP dies. Written by DocRushing

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. Written by DocRushing

One Russian kills another in the Los Angeles area; Callen and company investigate. G and Sam consult Arkady, a long-time Russian source; G suggests that, if Sidorov and Greshnev are back in the USA, then they have a buyer for the three stolen nuclear weapons, and Sam suggests that they seek his wife. Granger directs Hetty for the team to collaborate with Snyder, from the CIA, so Hetty directs Kensi and Deeks to keep Snyder busy and not to let him out of their sight. Sabatino, of the CIA, shows up at Sam's house; For the CIA Sam goes back undercover as David Forman, and Michelle goes under as Quinn; Greshnev demands that Quinn kill Kirkin; David tails Greshnev, but four LAPD cops stop David and arrest him, then Hetty leaves him in jail; Kensi makes a plan, and Deeks takes the point and makes a deal; Quinn executes Kirkin, David escapes, and Sam rescues Michelle; Greshnev dies, and Sidorov disappears. Hetty comments that this matter is far from over. Written by DocRushing

During a snowstorm near Moscow, Idaho, a Marine gunnery sergeant accidentally rolls his car; while he calls for help, an unknown pursuer executes him with a pistol; two days previously someone used the same weapon in the same way to kill Rachmed, a vocal Indonesian supporter of radical Islam, suspected of dealing in illegal arms, shot in Los Angeles, California, 1,100 miles away. While Kensi and Deeks seek and find Rachmed's shoes, G and Sam fly to Moscow to join both Granger and the NCIS Red Team, a mobile team based in Georgia. Eric gets a lead, which Kensi and Deeks trace; the bunch in Idaho run into trouble with a snowplow. Eric finds a major clue; Granger sends G and Sam back to LA plus three members of the Red Team; upon arrival they chase bad guys but lose the main one. A man, Roy, arrives as a temporary guy on the Red Team; he shares a history with Paris, the head lady in charge of that team. The Red Team goes to El Centro to trace a lead. [To be continued.] Written by DocRushing

The Callen gang and the Red Team continue to pursue Spears and other bad guys; G and Sam play Ari, who gives the name of Ramirez, a major player in illegal immigration; three members of the Red Team make a roadside meet with two of Ramirez's thugs and overcome them; Paris and her buds check out a house at the Salton Sea, where they find the bodies of Ramirez and 14 others; G and Sam join them; Eric finds the man with a red scarf, who fills in many blanks for Sam and Claire; Hetty realizes that Spears is not the executioner; G and Paris at the same time get into two separate gunfights with two people in two different parts of the same hotel; both G and Paris succeed, although Roy lends a hand to Paris (albeit by disobeying her); the two teams eventually put the pieces together correctly; Hetty tells Granger that they got the whole thing wrong from the outset; the two of them chuckle and lift their glasses together. Written by DocRushing

A lieutenant and Naval aviator dies of cyanide poisoning, as does a dancer, at a bikini bar in Oxnard, California, near Los Angeles; a jaygee and back-seat flight officer survives the same incident; Callen and company investigate; the poisoned survivor gives a significant clue; Kensi and Deeks check out the bar and the environs, where Deeks dives a dumpster and finds a syringe; they also find and question the bar's janitor, who's a citizen of Saudi Arabia; within five minutes of one another three people die of heart attacks due to cyanide poisoning in the suburb of Chatsworth; Eric and Nell discover the ideological motivation for the poisonings; Kensi and Deeks find the cyanide, and G and Sam stage a fight; G takes a ride and takes a drink; Sam, Kensi, and Deeks arrive and help; the team round up the bad guys; G reasons with a smart kid, who decides to do right; G sees him again later and offers insight; Hetty arranges a belated April Fool surprise for Deeks. Written by DocRushing

Nell reports that, in Tijuana, Mexico, local police, aided by USA forces, have gunned down the kingpin of the Barbosa drug cartel; however, by bizarre means the body of the victim disappears from the morgue as soon as it arrives; the SecNav directs Callen and company to investigate the possibility of a leak on the US side and to find the missing body. G and Sam chat with Ness, the agent in charge for the DEA; Kensi and Deeks sniff around in Tijuana, meet a cop, see an informant (Javier), get into a gunfight, rescue Javier, and take him to the boatshed; G and Sam again talk with Ness, who suddenly falls dead; Kensi and Deeks question Javier, who gives some startling answers. Back at the office G and Sam put the pieces together, and G solves the puzzle; Kensi and Deeks draw fire and lose Javier; however, the loss was a planned one; Javier runs into trouble; G takes on a new role; the good guys overcome the bad ones; Javier returns to Mexico for a new life. Written by DocRushing

Last night at a parking garage in Los Angeles, California, at least three gunmen stalk and attack an unidentified woman, who has disappeared; two bad guys and a bystander have died; Hetty cryptically assigns Callen and company to investigate. The fearless foursome find no identifying data about the people involved, but at the boathouse Hetty finds the missing woman, Grace Stevens, whom she knows, and who's a special agent of the NCIS on an undercover assignment; G and Sam arrive, meet her, and learn about her. Kensi and Deeks disguise as a newlywed couple, and Nell does so as a maid; Kensi rescues Nell from a tight spot. G engages Hetty in an intense personal conversation. Grace and the G team set up a sting, pull it off, and suck in the head man and two of his goons. Afterward G again chats with Hetty, who reveals more about Grace's background and her own history and activities. Written by DocRushing

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. Written by DocRushing

A nuclear bomb explodes in an uninhabited part of the Chihuahuan Desert in Mexico; attention turns to Zhrov, who manages Sidorov's illegal-arms dealership; Callen and company investigate; Hetty calls in Michelle, Sam's wife, from the CIA; the couple go back underground; G and Kensi go to Iran; Deeks watches over in Los Angeles. G and Kensi free Janvier from captivity in Iran so that he can do a job for the NCIS; the team realize how Sidorov moved the bomb into Mexico; they also localize Sidorov and two of his cronies; Sam and Michelle grab Sidorov and take him to the boatshed; the members of the team set up a sale of the two remaining nuclear devices; Janvier goes to the Mojave Desert to negotiate; Sidorov and others meet him there; they make a deal; G says that something is not right; Deeks communicates with Kensi; Sam falls into trouble, then Deeks helps, but Sam incurs torture, as does Deeks. [To be continued next season.] Written by DocRushing