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.

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.

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.

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.

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 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.

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

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 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.

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.

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 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.

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

When a vehicle transporting Jada Khaled is ambushed, NCIS must track down the culprit to save her and their case. Meanwhile, Sam is forced to confront Jada for the first time since returning from Sudan.

A new Assistant Director is assigned to oversee LA operations for NCIS, the team begins to wonder what his intentions really are.

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.

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

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.

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.

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.

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.

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.

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.

The team is assigned to track down a missing unmanned aerial vehicle (UAV) after it is compromised during a training exercise killing a marine before it disappears.