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.

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.

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.

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.

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.

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.

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.

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

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

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.

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

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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 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.

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.

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.

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

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.

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.

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.

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

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.

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.

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

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.

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