Despite several team members having grave reservations, NCIS travels to Mexico for a risky mission to locate and rescue Mosley's son.

The Special Projects team travels to Romania to search for Hetty, while delving into the history of the Comescu crime family, and their connection to Callen.

A nuclear explosion in the Pacific reignites the search for stolen nuclear weapons and prompts Hetty to shuffle the NCIS: LA partnerships, sending Callen and Kensi overseas and leaving Sam and Deeks teamed up state side.

Deeks' morning routine is disrupted when he is shot during a convenience store robbery, leaving the NCIS team to investigate whether he was the assailants' intended target.

Kensi and Deeks are sent undercover as married couple Melissa and Justin when evidence points to a Russian sleeper cell in a suburban neighborhood.

Deeks resumes an old alias he is not fond of in order to protect his best friend and chief informant from a criminal group that wants him dead.

Callen races against a ruthless adversary to locate a woman who knows the whereabouts of a forgotten fortune earmarked to fund a new war in the Middle East - and also holds the tantalizing key to his unknown past.

Callen and the NCIS: LA team confront their vengeful adversary, the Chameleon, when an undercover case ignites a deadly mind game orchestrated by the criminal mastermind.

After learning that Special Agent Kensi Blye disappeared and the Taliban may be he holding her captive, Hetty sends the NCIS: LA team to Afghanistan on a rescue mission.

When the NCIS: Los Angeles team and DEA uncover the cartel's plans to slyly transport billions of dollars’ worth of cocaine from Colombia to the U.S. using a submarine, Callen and Sam must quickly locate the missing vessel. Meanwhile, Hetty is called to Washington in the aftermath of the controversial mission in Afghanistan.

While in Afghanistan, Kensi and Granger join the team on a joint case when a federal agent in Los Angeles tied to Hawala, an ancient system of money transfer, is murdered.

Forensic scientist Abby Sciuto joins the Los Angeles NCIS team when a murder case resembles the pattern for a serial killer she has been tracking.

A senator’s daughter is the victim of a home invasion. The team investigate to determine if it was a random crime or a targeted attack due to her father’s crackdown on international cyber warfare. Meanwhile, Kensi’s holiday spirit changes after she receives a surprise Christmas gift.

After Sam is shot during a firefight with the cartel, a suspect is interrogated and reveals new information on the whereabouts of Spencer Williams, the man who kidnapped Mosley's son five years ago.

Following the kidnapping of Sam's wife, Michelle Hanna, Sam goes rogue from the NCIS team and attempts to stop his arch nemesis Tahir Khaled from ever targeting his family again.

The team searches for new evidence to prove Kensi Blye’s innocence after she is taken into custody as the lead suspect in a murder investigation involving her deceased father’s sniper unit.

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 (Jackson Hurst) returns for Hetty’s resignation.

The NCIS team must determine whether a dishonorably discharged Marine is the target of an international set-up or if he committed murder

In an effort to help Sam and Deeks return to work, Hetty calls upon Operational Psychologist Nate Getz to help them cope with their traumatic experience. Meanwhile, the rest of the NCIS: LA team investigates the murder of a former Navy Admiral and a controversial journalist aboard a private jet.

While Sam and Deeks recover from traumatic torture that will have a lasting impact on their personal and professional relationships, lives are still in jeopardy as the NCIS: LA team searches for stolen nuclear weapons.

When an attempted robbery takes place at a secure facility on a Marine base, Kensi must determine what the thief intended to steal.

Sam resumes a former alias and boards a one-way flight to Yemen in hopes of tracking down a terrorist group's leader and rescuing the hostage son of a Saudi Prince.

After months of planning, the NCIS family celebrates the wedding of Kensi and Deeks. Also, an old acquaintance, Anatoli Kirkin, pays Deeks a surprise visit on his wedding day and he isn’t alone.

When the body of a Navy Intel Officer is found, evidence points to a team of Navy SEALs who are about to depart on a hostage rescue mission, leaving former Navy SEAL Sam Hanna to interrogate the group and possibly compromise the mission.

Callen and Sam enlist the help of a Gurkha, an elite Nepali soldier specializing in knife fighting, to retrieve a missing thumb drive. Meanwhile, Kensi and Deeks struggle to find a balance in their partnership.

After a rocket engine expert is killed, NCIS tech operator Eric Beale goes undercover for the first time to ensure that the classified technology used to build satellites is safe.

The NCIS: LA team investigates a shooting outside the Vietnamese Consulate just prior to an international conference at the venue that the Secretary of the Navy is scheduled to attend.

The Department of Justice target a member of the team. Leon delivers unsettling news to Hetty.

The LAPD calls upon the NCIS team when a raid links a Mexican drug cartel to a wanted terrorist. Meanwhile, Sam’s most prized possession is stolen.

Suspicious of an undercover venture involving a deal between corrupt cops and military personnel, Callen and Sam try to expose the illegal operation by posing as California highway patrol officers.

Callen and Sam find themselves trapped inside an armed submarine that terrorists are intending to use to hit an aircraft carrier in San Diego. Hetty goes against orders and forgoes her trip to Washington, as the team attempt to locate and save Callen and Sam and stop the terrorist attack.

The team races against time to save a Naval Commander's daughter after seeing a video of her being buried alive.

A Navy SEAL imposter's death gives the team a lead on a missing canister used to make deadly bombs.

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

Sam goes undercover as a prisoner to track down a terrorist group responsible for several bombings around the world.

The investigation into the murder of two private military contractors ends up putting a member of the team in grave danger; Sam arranges a blind date for Callen.

The NCIS team joins forces with the NSA to find the creator and controller of a software program linked to a cyber attack against the Department of Defense. Meanwhile, Callen continues searching for more information about his past.

The NCIS: LA team finds themselves in danger while investigating a kidnapping case of a man claiming to be Callen’s father.

Hetty and the NCIS team continue to search for an elusive book that has the attention of several foreign security agencies.

Following Callen’s public shooting of the Chameleon, all is not well with the NCIS: LA team, as Callen is placed on suspension and Hetty adjusts to retired life.

With Assistant Director Granger critiquing every move, the NCIS team must track down a chameleon-like killer who has evaded law enforcement agents, including their very own Special Agent G. Callen, across several countries.

The team learns that someone from their past is targeting one of their own. Nate Getz attempts to help Nell get through a traumatic experience.

The team looks for the person responsible when classified pentagon documents are uploaded to a blog site.

The team must locate and retrieve a stolen antiterrorism device before the city is attacked; Hetty is haunted by her past.

As the courtyard is being transformed with holiday decorations, the NCIS team races to solve the murder of a Marine by an exploding cell phone and to find the remaining men of his former EOD (explosive ordnance disposal) unit before another deadly explosion kills someone else.

Callen and Sam search for a murder suspect -- a retired assassin (Danny Trejo) they encountered on their first case together.

When a former Romanian Communist leader and suspected war criminal is discovered to be living in Los Angeles under a false identity, the NCIS: LA team must locate him before he disappears again.

The NCIS team races to save one of their own when they receive video evidence of Special Agent Dominic Vail being held hostage months after he was kidnapped.

When a news reporter announces the group responsible for the deadly explosion at a military-sponsored charity event, the team must investigate her claims and search for the attacker.

The team take a look at a burglary at a cyber-security company, and Callen has to steer clear after Hetty reveals that his girlfriend, Joelle, is one of the main witnesses.

Special Agent Sam Hanna is sent undercover as a bomb specialist as the team races to locate stolen explosives somewhere in the city. Meanwhile, to much protest, Hunter changes the dynamics of the team and has Callen partnered with Kensi and Sam with Deeks.

Analyst Nell Jones joins the NCIS: LA team in the field when a former Navy officer’s girlfriend is kidnapped in exchange for Navy intelligence. Meanwhile, Deeks unknowingly breaks one of Hetty’s rules.

When a CIA agent who worked with Sam Hanna over eight years ago seeks his help and is soon found dead of an apparent suicide, Hanna and Callen suspect foul play and a bigger conspiracy. Meanwhile, Deeks finds his inner “dog whisperer” with Kensi as the two go undercover and enter a dog show with a prized poodle.

When Callen goes to the National Counterterrorism Center on the pretext of interrogating a Russian asset from the crashed plane case he investigated months earlier, the tables are turned and he is detained, accused of being a Russian agent.

Hetty goes rogue, leaving the NCIS team completely in the dark, and the mole kidnaps one of the agents.

NCIS investigates whether the life of a Venezuelan politician is in danger after a Navy Intelligence Commander who is responsible for tracking his moves suddenly disappears.

A botched assignment forces Hetty to fire Deeks and send him back to the LAPD. Meanwhile, an awkward goodbye between Kensi and Deeks leaves her with unexpected emotions for her old partner

The NCIS: LA team continues their investigation behind the death of a CIA agent that leads to a dangerous ring of Russian super agents. In a race against time, Hanna risks having a secret exposed.

When a gang identifies and executes an undercover agent, the team must locate a mole before other agents are put in danger.

After a diplomatic service van transporting an unknown package from the State Department is hijacked, the NCIS team must determine who committed the crime and what has gone missing. Meanwhile, Callen and Sam celebrate five years as partners, but face one of their biggest challenges when they go undercover for a case.

Sam receives a distress code from Aiden saying that his school is being taken over by an extremist group.

The NCIS: LA team find out that one of their own has been compromised as they investigate the murder of a Navy contractor involved in illegal transactions of confidential data.

The team rushes to a crime scene after receiving an "agent needs assistance" page and learns that one of their own is in peril.

When a former Marine is suspected of creating a chemical bomb, the NCIS: LA team joins the FBI’s domestic terrorist task force including Operational Psychologist Nate Getz.

As the team races to save Kensi from Ferris/Sullivan, they find themselves questioning who they can trust when old faces resurface.

Sam, Callen and Rountree travel to Afghanistan when Marine Lieutenant Colonel Sarah "Mac" MacKenzie asks NCIS to help with a sensitive case after two SEALs claim their chief murdered an unarmed prisoner.

Gravely injured and unable to communicate with the team in the U.S., Callen, Sam and Kensi, with an unconscious Deeks in tow, search for a safe way home as a cartel boss places a “dead or alive” bounty on their heads. Also, Mosely and retired Navy Admiral Hollace Kilbride beseech their contacts in Mexico and D.C. for assistance with their missing colleagues

The team takes an undercover agent who is suspected of working for the smuggler he is supposed to be investigating into custody; Kensi and Deeks discuss their relationship.

The NCIS team must locate a classified device with the power to destroy Los Angeles that was stolen from a college research facility. Meanwhile, Sam tries to track down a highly sought-after Christmas present for his daughter, and Eric meets Nell’s parents.

The NCIS team continues the case with ATF and the stolen weapons. Also, Callen and Anna decide on an impromptu wedding.

The team investigates the murder of a Marine who had top-level security clearance, and the corpse is missing a hand.

The NCIS: LA team must find who compromised a classified vaccine project from a bio tech company. Meanwhile, Deeks struggles with his emotions upon returning to the field.

Kensi goes undercover as a nutritionist and Deeks poses as a new patient at a rehab center to investigate the death of a Navy officer.

While Hetty is attending a Senate hearing in D.C., the investigation of a murdered Marine Lance Corporal leads the NCIS team to stolen anti-tank missiles and a dangerous militia group.

Nell joins Deeks in the field on a case involving a former Marine who is being tracked by al-Qaida after embezzling money from Iraq.

The NCIS team uncovers an experimental Navy tracking system when a body containing a top-secret residue is stolen from an autopsy room. Meanwhile, Callen challenges Hetty on the rock wall.

Deeks goes undercover to obtain information about an infamous arms dealer looking to get back in the business, but the woman he befriends leads the operation in a dangerous directon. Meanwhile, Kensi confronts new emotions as she runs surveillance on Deeks and his female source.

Callen, Sam, Kensi and Deeks join Hetty’s team from the Vietnam War, Sterling Bridges, A.J. Chegwidden and Charles Langston, in a dangerous and off-the-books rescue mission to save Hetty from her captors in Vietnam. Also, Mosley calls in Nell’s sister, homeland security specialist Sydney Jones, to assist the team in Los Angeles with processing evidence connected to Hetty’s time in Vietnam.

When one of their own disappears while undercover, the team must work alongside LAPD on a case involving human-trafficking, money laundering and drugs.

Sam is arrested accused of murdering a woman and Callen and Granger attempt to clear his name.

When an undercover operation has the NCIS team investigating a MMA gym and its fighters, Sam Hanna is tasked with donning gloves and entering the cage for a one-on-one fight.

When a Navy ID is found on a dead body tied to a hazardous material smuggling case, NCIS is granted permission to investigate in Mexico and asked to help locate the missing materials.

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, on the 250th episode

After Sam’s undercover mission in Sudan turns deadly, Callen and the NCIS team must track down their missing agent before it is too late.

Eric witnesses his friend, a computer systems expert, being attacked by people who want information that could redirect a missile; Kensi runs into a familiar face in Afghanistan.

When a murdered antiques dealer's book of top-secret information goes missing, Hetty sends the NCIS team on a mission to find it.

NCIS investigates the murder of a Navy officer entangled in the world of Hollywood glitz and glamour as the team is joined at Hetty's request by LAPD liaison Marty Deeks.

The team travels to Syria to apprehend a High Value Target where one team member is severely injured when the mission goes awry.

Following the murder of a Russian woman, the NCIS team uncovers evidence that answers who and why Callen was shot six months ago.

Callen and Sam work with Navy Captain Harmon "Harm" Rabb, Jr. (David James Elliott) to locate a group of ISIS sympathizers aboard the USS Allegiance. Also, Hetty enlists her friend, Lieutenant Colonel Sarah "Mac". Mackenzie (Catherine Bell), to help obtain information from a Russian diplomat.

When a 15-year-old hacker compromises missions, Callen goes under cover at a prestigious high school.

The NCIS team hunts for a heist crew that robs a Los Angeles casino with military-grade power. Also, Kensi and Deeks hear exciting news regarding the adoption and Callen takes a big step in his relationship with Anna.

When a Navy lieutenant and his grandfather are kidnapped from a retirement home, the team's investigation leads them to a con artist couple and the hunt for a rare coin; Callen meanwhile has to deal with his father's actions when he kidnaps the father of his grandson (and Callen's nephew).

The NCIS team jumps into action when video surveillance footage shows an ambush on a humvee transporting Marines in the desert. Meanwhile, Nate returns from his mystery assignment.

The NCIS team helps a U.S. ambassador search for her missing daughter, Gia, a popular social media influencer. Also, Agent Aliyah De León returns to support the team with the case.

Rountree and his younger sister are pulled over by police and treated harshly in a clear case of racial profiling. Also, NCIS investigates the death of a Navy photographer who was assigned to document the building of a new weapons station.

NCIS investigates the murder of a woman employed in the Navy’s missile defense program and its connection to stolen Navy missile technology. Also, a strict social worker stresses out Deeks, and Sam debates selling his boat.

The NCIS team searches for Sam’s former partner, Ruiz, who disappears during an undercover operation to buy a deadly explosive.

NCIS investigates the kidnapping of Master Sergeant Boomer, a military working dog. Also, Sam looks to sell his boat so he can take care of his father who is suffering from Alzheimer's.

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 a crooked upscale banker

The NCIS team must quickly find Kensi and Fatima after they are kidnapped and drugged while searching for a missing Navy lieutenant who they learn has ties to a dangerous Islamic militia.

After an architect duo who specializes in designing secure buildings is kidnapped, the NCIS team mounts a search to bring them home. Also, Deeks and Kensi realize they may need to get Rosa some help with her schoolwork, and Anna considers a career outside of law enforcement.

NCIS investigates an arson attack at Global West Ventures Corp, a naval defense contractor. Also, Rountree connects with an ex and Kilbride gives Callen files on Pembrook.

Callen and Sam are shocked when an old acquaintance, who they thought was the recent victim of a murder, appears and asks for their help. As the team investigates, they uncover a possible breach of America's economic sanctions against Russia.Source: CBS

Callen goes undercover to infiltrate a network of Chechen terrorists who are recruiting foreign fighters to join their cause and planning their next attack in the U.S.

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. Also, Kensi and Deeks struggle to decide if they are ready to make the leap and buy a house.

When a civilian scientist working with the marines is killed, and her advanced radar technology stolen, the NCIS team must scramble to find the missing technology and the culprit. Deeks worries about how to tell Callen that he's selling the bar.

When a Marine falls ill during a training mission due to an attack by a genetic weapon, the NCIS must track down the person responsible for unleashing it. Also, Deeks struggles with balancing work and home life when Rosa comes down with the flu.

When DOJ Agent Lance Hamilton's partner is killed, Sam dons his previous undercover persona of "Switch" to find the culprit. Also, Kensi, Deeks, Rountree and Kilbride work to catch an aerospace engineer who stole classified Navy schematics.

When NCIS investigates a shootout on a boat in which a rare cultural artifact is stolen, they’re shocked to learn who owns the boat.

Callen returns back to the NCIS Office of Special Projects to solve a kidnapping case.

NCIS investigates the robbery of a high-end arts storage by going undercover as potential buyers on the black market, to find who is behind the stolen items.

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 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.

The NCIS team investigates an unidentified aircraft that flies into U.S. airspace and crashes into a Navy plane. Also, Deeks and Kensi begin to prepare for their foster inspection.

The NCIS team must investigate when a Navy reservist is stabbed and his lab full of pesticides and insects is ransacked. Kilbride offers Sam the interim operations manager position. Rountree thinks about his future.

The NCIS team helps Naval intelligence officer Akhil Ali locate a fellow officer who went missing while recruiting foreign assets as potential sources of intelligence. Also, Callen and psychologist Nate Getz track down a man Callen believes was present for his training when he was young.

NCIS is called to investigate after Rear Admiral Ted Gordon is abducted from his home. Also, Kensi struggles with being the fun parent while Deeks is apartment hunting with his mom.

NCIS is called to investigate when a woman is seen fleeing the scene of her husband's murder. Also, Roberta Deeks comes into town to meet Rosa, and Sam looks for another aide for his father.

CIA Officer Veronica Stephens asks the team for help when an agricultural engineer Hetty asked her to bring to the United States disappears

The team attempt to find an expert sniper after they learn about his connection to an extremist group.

Faced with multiple cases worldwide, the NCIS team splits up, with Callen and Sam working with Mossad Agent Eliana Sapir in Tel Aviv, and Kensi partnering with DOJ Agent Lance Hamilton in Los Angeles.

When Sam's friend Tom Olsen finds himself being hunted down by enemies from his past, the NCIS team must find out who is after him.

NCIS investigates the apparent suicide of a Navy intelligence officer who leapt to his death after taking LSD. Also, while Kensi is away, Deeks makes plans to redo the backyard without her input.

When a missile test is hijacked and sent off course, the team searches for the hacking group responsible for the attack with the help of a young computer specialist Hetty brings in to assist the team. Also, Nell sees the bond between the tech guru and Eric and she becomes jealous.Source: CBS

A 20-year-old Peruvian massacre is investigated after a famous fashion model, believed to be one of the survivors, becomes a potential target. Kensi goes undercover as the model's assistant, while Deeks poses as her chauffeur.

As Callen continues hunting Katya, Kilbride enlists NCIS to help find a truckload of stolen guns. The assignment becomes more challenging when their suspect, the son of a mob boss they believe was planning to sell them, is found dead.

Members of the team take a look into the death of an Afghan soldier training in America.

Callen embarks on a secret project, leaving Sam and the entire team in the dark. After Hetty demands his operation be shut down, the team is tasked with locating Callen before he finds himself in over his head.

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.

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. Meanwhile, Hetty gives Nell a cryptic assignment.

Following a successful sting, an explosion causes three FBI agents to be killed.

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

The NCIS: LA team heads to the beach to question the possible link between a surfer, an Internet video and a dead Naval tech scientist. Meanwhile, as Callen and Hanna investigate the victim’s intelligence connections, Deeks and Kensi go undercover to catch their suspects and some waves.

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

Some presumed dead crew members show up from the missing tanker that was involved in Arkady's deal with Russia.

Callen and Sam end up being abducted during the follow up of an anonymous tip about a missing NSA agent.

Sam Hanna must go undercover as a fighter to catch the leader of a gang dealing drugs on the streets

An NCIS: LA investigation leads the team to question a lone survivor of a former terrorist organization, while Kensi and Deeks follow the trail into the woods

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.

When the NCIS team receives a cryptic, urgent message, Fatima and Rountree must work together to solve the case. Also, Kilbride plans to visit his son, and Callen asks Sam to be his best man.

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).

Looking for the person responsible for an anthrax poisoning, Sam and Callen work under cover as food truck owners.

When Kensi and Deeks announce to the team they are moving in together, coincidentally, Hetty assigns them to protection detail for Jack, Kensi’s ex-fiancé, who is in possession of a list containing important contacts in Afghanistan that people are willing to kill to get their hands on.

After napalm is detected at a crime scene, the NCIS team investigates the sole casualty for possible links to terrorism.

Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacist group believed to be in possession of stolen nuclear material, while Kensi transforms herself into a tattooed biker to play the part of Callen’s girlfriend. Also, Callen’s first meeting with Hetty is revealed.Source: CBS

Sam and Callen need to get their hands on some key evidence after a U.S. Ambassador survives a terrorist attack.

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

The investigation of a drive-by shooting has the NCIS team searching Los Angeles for the dead marine's younger brother who may be the next target and the one with the answers.

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

The NCIS team scrambles to find Kensi, when she is attacked and kidnapped by a mysterious militia group while helping a group of migrants cross the border.

The NCIS team join forces with the FBI when a group of grisly murderers known as “The Body Stitchers” returns after evading capture by NCIS years ago. Also, Sam’s dad makes a new friend in Arkady.

After a cryptocurrency farm is robbed of over $10 million in Bitcoin codes, Sam and Hidoko go undercover, with Sam resuming a likely compromised former alias.

The team investigates a ransomware attack that takes out the entire power grid for west L.A. and paralyzes the city. Also, as the first holiday season since the death of Sam’s wife approaches, he struggles to find the best way for his family to celebrate.

After Sam is shot by a spy contracted by the CIA the team need the help of a Nepali soldier.

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.

The team goes on the chase for a Navy analyst being held hostage, only to discover things aren't as simple as they seem.

LAPD Detective Whiting calls in a favor when Deeks' former partner goes rogue.

After Operational Psychologist Nate Getz 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,

When an ATF agent goes missing, the agency seeks help from the NCIS team to investigate stolen military-grade weapons and locate the agent. Also, Callen and Anna continue to plan their wedding, Rountree’s sister interviews for medical school, and Sam encourages his father to take part in the drug trial.

When a convicted Cuban spy escapes U.S. custody just before he is set to return to his country in a prisoner exchange, the team is shocked to learn that Anna helped him break out. Also, Deeks admits to Kensi that he thinks she is too messy.

Sam negotiates and Rountree goes undercover, when a man takes a busload of hostages and threatens to blow it up unless his daughter’s war crimes are posthumously cleared.

The NCIS team partners with the State Department after the murder of an arms dealer is connected to a series of crimes seemingly executed by someone with elite special forces training. Also, Callen visits ATF Agent Anna Kolcheck in prison as she awaits her sentencing.

The NCIS team links the theft of an undersea drone prototype to a video game streamer’s elaborate party. Also, Callen and Sam cross paths again with insurance broker Katherine Casillas, who insures the gamer’s property and processions.

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

NCIS partners with the FBI after a Marine is murdered by a rare nerve gas. Also, Deeks shares his dream to quit law enforcement and open a bar.

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.

While Callen suspects Hetty of keeping secrets about his past and Joelle surfaces in her quest to capture Katya, NCIS must track down an informant whose life is in danger. Also, Kensi and Deeks work to expand their family.

The team searches for a missing teenage girl who is feared to have been recruited by a terrorist organization,

Sam and Kilbride clash when a case involving an arms dealer responsible for the slaughter of ATF agents leads them to a well-connected colonel and friend of Kilbride, accused of supplying militia groups with guns. Also, Kensi and Fatima go undercover at a rehab facility to question the arms dealer’s girlfriend.

The NCIS team searches for a suspect and their motive following the bombing of a large facility where military combat drones are assembled. Also, Callen and Kilbride get troubling news about a body found in Syria.

When Sam’s daughter Kam is kidnapped after leading citywide protests he will stop at nothing to find her. Also Deeks rejoins NCIS and Callen searches for answers about Anna

Sam goes undercover as a day trader after a prominent investment banker with ties to a Russian oligarch is murdered. Meanwhile, one of Callen’s aliases is the victim of credit card theft, and Mosley is concerned it signals something bigger.

Some of the team have to assume undercover identities in Moscow so that they can locate their suspects.

A case involving the murder of a drug dealer turns personal for Special Agent Sam Hanna when he discovers his former Navy Seal comrades are involved.

Callen and Sam are forced to work on their day off when they mysteriously receive a cell phone and the caller threatens the lives of innocent people if they don’t do exactly what he says.

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

While assigned to protective details for the commander of the Pacific Command, the team searches for a North Korean spy.

When a newborn child is found abandoned on a Navy ship, Kensi and Deeks search for the mother on board before she dies of complications. Also, Nate meets with Admiral Kilbride and learns about the CIA project from the ‘70s and ‘80s involving children.

When Aiden Hanna's plane crashes and he is accused of being at fault for the accident, the NCIS team must investigate to clear his name; Rountree considers how he wants to handle the aftermath of the incident with the LAPD.

After a former Department of Defense employee reveals government secrets to a cult, The Church of the Unlocked Mind, Kensi and Deeks go undercover in order to protect him. Meanwhile, the team must prevent the church from selling the secrets to a Chinese spy.

Kensi and Deeks go undercover at a decommissioned nuclear power plant as the team investigates the radiation poisoning of a Gunnery Sergeant moonlighting as a security guard there.

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.

When the daughter of a notorious counterfeiter arrives in Los Angeles, Sam is sent undercover as a financier, while Callen partners with Anna to track the family's latest scheme.

While Callen and Sam are aboard the USS Allegiance, the ship is placed under quarantine for possible Ebola exposure. Also, Kensi and Deeks investigate the murder of a petty officer who recently departed the USS Allegiance and is linked to the Ebola exposure.

After the chief of logistics for a naval weapons station collapses on the job, the NCIS team must determine if this is a terror threat or a stress-induced breakdown. Also, Kensi and Deeks research different honeymoon locations.

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.

When a suspected North Korean spy is poisoned and hit by a truck carrying Christmas trees, the team must search for who is responsible for smuggling spies into the country. Also, Deeks and Kensi try to find a way to include their mothers in their Christmas plans, and Hetty notices that Granger isn’t feeling the holiday cheer.