While trying to find the serial killer Gibbs was after, the NCIS team discovers another person has been tracking the case as well.

Gibbs and Parker go on a road trip to find one of the serial killer's victims. Also, Agent Knight goes undercover at a large manufacturing company with ties to the murders.

The path leads to Alaska, where Gibbs and McGee go on a very long road trip. It's still all about getting information on the serial killer, Paul Lemere.

The NCIS team investigates the death of a Navy Commander found in a shallow grave.

NCIS investigates the death of a beloved Navy commander who trained some of the top athletes in the country.

NCIS investigates the death of a man on a cruise ship whose body is discovered in the ship's sauna.

NCIS investigates the case of a Navy reservist whose body is found in a target car on a shooting range.

When a hotshot financial advisor is found shot at a naval station, NCIS investigates the case by interviewing the victim's three-dimensional hologram of herself, which she created before her death.

NCIS is called in when Navy Chief Warrant Officer Rafi Nazar is suspected of trying to sell stolen classified Navy software used to pilot surveillance drones.

After a civilian research vessel in the North Atlantic picks up a small boat of wounded Navy officers, NCIS arrives on the ship and is forced to hide after discovering terrorists on board.

When the body of a Navy lieutenant is discovered missing an eye, the NCIS investigation leads to the world of cage fighting.

Investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly bio-toxin. The NCIS team calls on Doctor Carol Wilson for help as they race to find the antidote. Torres tries to distract Jimmy's daughter, who came to spend the day with her dad.

As NCIS investigates the cause of death of a reservist Navy Seal surgeon, they're forced to bring Vance's daughter, Kayla, who recently trained with NCIS, to help with a highly dangerous mission.

Parker's delinquent past resurfaces when NCIS is called to Philadelphia to investigate the death of a Navy petty officer.

A gruesome mishap at a Navy petty officer's gender-reveal party leads NCIS to the case of a missing teacher that was popularized on a true crime podcast.

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group. Torres gets a call from Tennant to come to Hawaii when she gets a lead on a witness from a case they worked on together.

When an infamous arms dealer, Reymundo Diaz, is released from prison and bodies start piling up, Torres is forced to face the repercussions of his actions during an undercover operation he worked on years ago.

NCIS investigates a ring of clever teenage partygoers when a string of break-ins takes place at Marine Base Quantico. While working the case, Special Agent McGee forms a bond with one of the teens, Teagan Fields.

The NCIS team investigates the unexpected death of a Navy reservist who was working on a Deputy Attorney General's investigation. Also, Knight and Jimmy's budding romance is put on hold when a vital liver transfer goes fatally wrong.

The team investigate a kidnapping that has a personal connection for one of them, and stirs up painful memories from the past.

Alden Parker is still on the run with his ex-wife Vivian, now the team is investigating on who might have a personal vendetta against him in hopes of clearing Parker's name.

McGee's personal life and professional life intersect when a dad from his children's school is linked to a break-in at a government storage bunker.

When a dead body is found at an ancient burial site that is thought to be cursed, the team tries to determine the motive and the symbolism behind the crime. As Torres continues therapy with Dr. Grace, he discovers that their lives are in danger.

Agent Knight's past resurfaces when her ex-boyfriend, a National Parks Service agent, teams up with NCIS to investigate a campsite murder.

Agent Parker steps up to protect Director Vance after a terrifying home invasion. The team detects advancements in Jessica and Jimmy's blossoming romance.

While investigating the death of a fellow NCIS agent who was cat-sitting for a friend the team realizes that one of their own has been secretly investigating them to locate a possible mole.

NCIS should investigate the Secretary of the Navy when her husband starts accusing her of trying to murder him.

An unknown shooter causes chaos at an annual Thanksgiving 5K, time is of the essence for the NCIS team to find the culprit. Kasie joins Knight for Thanksgiving lunch at Knight's sister's house.

The team investigate the death of a college student who was hit by a truck, after inexplicably stripping in the street before running into the road.

The entire NCISverse who are in Washington D.C. to celebrate the retirement of their former professor. However, their worlds intertwine when the NCIS agents are forced to investigate the same professor's suicide.

Parker discovers he's a victim of identity theft while investigating the unusual murder of a Navy ensign. Knight and Jimmy face hurdles in their relationship as their connection heightens.

When an old pal of Torres' comes to him - disheveled and bloodied - for guidance amid a undercover FBI operation and then disappears, NCIS helps track him down. McGee prepares to be a contestant on a popular game show.

In preparation for a role, a world-renowned actress shadows the NCIS team as they investigate a decapitation case.

Parker grapples with his emotions when a con man from his past turns up as a murder suspect.

NCIS investigates the death of a ride-share driver who was found after a car accident. Parker's dad, who is temporarily living with him, assists the team in their investigation.

The NCIS team starts to investigate on who is responsible for a potential bio terror attack at a strip mall parking garage.

When a marine is killed, the team investigate. They learn the man worked at a Center that helps Afghan immigrants. They go there and learn the man had a heated discussion with an Afghan. They learn the marine worked with his father when he was stationed there and he tried to get his family out but his parents were killed by the Taliban. They think he blamed him for their deaths. They try to talk to him but he runs. They learn he has bomb making materials. They eventually apprehend him and he tells them the marine was trying to help because someone was forcing him to make the bomb only he doesn't know. So they need to find out who and what they want the bomb for. Palmer is concerned about his daughter going on a date.

The NCIS team digs deep to investigate a Navy lieutenant who's accused of trying to murder her husband, but has no memory of the attack; Kasie navigates a potential medical scare.

Agent Knight saves a mother and child from a potentially fatal car accident and she is now viral for this reason.

NCIS works to solve the murder of a senator's daughter who has a rebellious reputation and large online following: Jimmy gets competitive with an old college rival.

When a suspicious murder occurs in the classified section of the National Archive, NCIS must investigate a string of Russian spy encounters that may be linked to the crime.

Torres finds himself in prison as the team tries to stop an impending terror attack on U.S. soil.

Parker's delinquent past resurfaces when NCIS is called to Philadelphia to investigate the death of a Navy petty officer.

The team investigate a kidnapping that has a personal connection for one of them, and stirs up painful memories from the past.

Parker grapples with his emotions when a con man from his past turns up as a murder suspect.

After a civilian research vessel in the North Atlantic picks up a small boat of wounded Navy officers, NCIS arrives on the ship and is forced to hide after discovering terrorists on board.

Alden Parker is still on the run with his ex-wife Vivian, now the team is investigating on who might have a personal vendetta against him in hopes of clearing Parker's name.

NCIS investigates the death of a ride-share driver who was found after a car accident. Parker's dad, who is temporarily living with him, assists the team in their investigation.

Parker discovers he's a victim of identity theft while investigating the unusual murder of a Navy ensign. Knight and Jimmy face hurdles in their relationship as their connection heightens.

NCIS investigates the death of a beloved Navy commander who trained some of the top athletes in the country.

When a suspicious murder occurs in the classified section of the National Archive, NCIS must investigate a string of Russian spy encounters that may be linked to the crime.

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group. Torres gets a call from Tennant to come to Hawaii when she gets a lead on a witness from a case they worked on together.