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 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.

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.

When NCIS investigates the murder of a man about to reveal the source of a massive counterfeiting operation, an old acquaintance becomes their prime suspect and reveals the true reason for her return.

While NCIS must track down an organized crime leader who is trying to buy stolen defense technology, Callen goes to Anna to ask the ultimate question, and Deeks is kicked out of NCIS training, Hetty has a life-changing surprise for him.

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.

When Callen goes to the National Counterterrorism Center to interrogate 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.

After Callen receives a cryptic message from Hetty, he tracks down the person tailing him, bringing him to a remote location teeming with Russians - and face to face with Anna.

To rescue Joelle from further torture by the Russians, Callen and NCIS must offer up Anna as bait to Katya. Callen finally discovers who accused him of being Russian spy.

The team discovers that Anna is being held by a group with ties to Anna's upbringing and must rescue her before she is forcibly returned to Russia. Also, Admiral Kilbride makes Nell a serious offer.

NCIS obtains a hard drive containing a realistic deep fake video of a deceased terrorist and must retrieve the dangerous technology behind it. However, when the team's comms are highjacked during their mission, they find that one of their own has been a victim of its potential.

When military grade technology is stolen, a deaf engineer, Sienna Marchione, who always wanted to serve her country, and the only member of her team to survive the theft, helps Kensi and NCIS track down the tech before it's taken out of the country.

When a Naval Intelligence Officer is tortured and murdered, NCIS must work with Joelle, who informs them that other CIA operatives are being killed in the same way. Also, Kensi receives a threatening postcard from David Kessler, the sociopath who is obsessed with her.

Deeks is kidnapped by an associate of Kirkin's in need of his help and NCIS investigates the shooting of a militarized dolphin equipped with a Russian microchip. Also, Beale makes Nell an interesting offer and Hetty returns.

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.

NCIS takes the case personally when an LAPD officer's father, a beloved elderly Japanese American veteran, is the victim of a vicious hate crime.

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.

As Callen continues hunting Katya, Kilbride enlists NCIS help to find a truckload of stolen guns; the assignment becomes more challenging when their suspect is found dead.

When an NCIS mission to protect a compromised undercover agent goes completely sideways, the agents are individually interrogated to find out what really happened; Kilbride must make a difficult decision.

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.

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.

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 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.

When a civilian scientist working with the marines is killed and her advanced radar technology stolen, the team must scramble to find the missing technology and the culprit.

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

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.

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

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.

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 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.

NCIS helps Naval intelligence officer Akhil Ali locate a fellow officer who went missing while recruiting foreign assets as sources of intelligence. Callen and Nate Getz track down a man Callen believes was present for his training.

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.

NCIS team works with DEA Agent Talia Del Campo to find a missing whistleblower set to testify against gun manufacturers marketing to drug cartels.

NCIS investigates after two men are blown up by their own explosives while attempting to break into a military base. Also, Callen wants to take the next step with Anna, and Sam moves in with his father, Raymond.

The NCIS team must quickly find Callen after he falls for Katya's trap using Sam's deepfake to coordinate a weapons deal.

The NCIS team hunts for a 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.

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

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.

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. Sam's dad makes a new friend in Arkady.

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 and Sam finds a new caretaker for his father.

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

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

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. Deeks struggles with balancing work and home life when Rosa comes down with the flu.

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

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.

In Washington D.C. to celebrate the retirement of a former professor. The NCIS agents are forced to investigate the professor's suicide. Each member learns a hitman is out to kill each and every one of them - with $200,000 bounties on them.

A former Navy SEAL turned best-selling author, is attacked by terrorists in Utah. Fatima and Kensi team up with a DOJ agent and a CIA agent (temporary Special Deputy Marshal) to save the Day.

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.

A mystery woman attacks the founder of an AI company, the team must identify the woman before the next major global conflict ensues. Kilbride's ex-wife, Elizabeth comes to ask him to think about reconnecting with their son.

When a petty officer is found dead with an apparent suicide note, the NCIS team must investigate the mystery surrounding his death. Also, Callen and Anna begin wedding planning and Sam has a heart to heart with his daughter.

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

When NCIS receives a message, Fatima and Devin work together to solve the case. Kilbride plans to visit his son, and Callen asks Sam an important question.

NCIS OSP is tasked with assisting NCIS' cold case homicide unit with a case from 2003 and a missing Navy petty officer. Kilbride and his son, Alex, work to rebuild their relationship.

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 - [S14 Ep18]

When four people, including a CIA officer, are shot and killed in broad daylight, the NCIS team suspects the attacks have something to do with DRONA. Also, Pembrook meets with Callen and gives more insight into his past.

When an ATF agent goes missing, the bureau seeks help from the NCIS team to investigate stolen military-grade weapons and locate the agent; Callen and Anna continue to plan their wedding; Rountree's sister interviews for medical school.

Sam and Callen find a way to end the shootout with ATF Adams. Deeks and Bly continue Overwatch and make some decisions that are either exciting or simply dangerous. Nina Barnes goes on an undercover assignment with Sam so Callen can get to an air gaped computer. Undercover ATF comes to an end. Roundtree's sister gets an answer about medical school and they get a response to their lawsuit against LAPD that could change everything for them. Bly and Deeks gets some surprising news. Callen and Anna finally make it to the alter. Then the team prepares for one last mega mission.

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.

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

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

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.

In Washington D.C. to celebrate the retirement of a former professor. The NCIS agents are forced to investigate the professor's suicide. Each member learns a hitman is out to kill each and every one of them - with $200,000 bounties on them.

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 and Sam finds a new caretaker for his father.

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.

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.

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.

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.