NCIS, the FBI, and MI6 continue an international manhunt for an escaped British spy who is targeting current and former agents.

Terrorism shakes the foundations of the Navy and NCIS to such an extent that Gibbs and the team face surprises that will devastate them.

As NCIS mourns the loss of Ducky, the agents find comfort in working on one of his unfinished cases involving a woman whose father was dishonorably discharged from the Marines.

A group of serial terrorists seek revenge and send Ari on an assignment to kill Gibbs. The NCIS team go on a hunt after him, but when they discover that Ari has a bigger plan, it is already too late.

When one of their own is killed, the team must find the killer before they get to another member of the team, Gibbs. In an emotional investigation, the team tries to stay together, against the wishes of Assistant Director Vance.

While the NCIS team investigates the link between a dead journalist and a Petty Officer, Ziva is taken aback by the sudden emotional visit by her father, who she hasn't seen in more than two years.

The NCIS team investigates whether a fire on a U.S. Navy ship that served as a secret detention site for indicted terrorists was accidental or an intentional diversion for an escape.

When a murder investigation leads the team to Gibbs' hometown, secrets about his past are revealed.

The international manhunt for Eli David's killer turns into a federal witch hunt against Gibbs and the team, which questions their unconventional methods and threatens their future at the agency.

Gibbs heads to Mexico to face his demons and make a startling decision.

A widowed Marine wife, whose husband was seemingly killed by a Taliban sniper, asks Gibbs for help to find out the truth.

When Tony opens a mysterious letter thinking it's for him, a small puff of white powder comes out and releases a possible deadly virus. Soon Kate and Tony are isolated in a bio-hazard isolation room for precaution. McGee and Gibbs work to discover who sent the envelope and how to cure their friends before it's too late for them.

The NCIS team must work on an assignment against a terrorist group without Gibbs, who is still recovering from the explosion. Gibbs has to fight with memory loss, while he's visited by his mentor and his former boss. Gibbs' help is needed, especially when the team discover that he is the only person who has information about the terrorists' plans.

Ziva continues to pursue revenge against Eli's killer, Ilan Bodnar, and Vance continues to endorse her actions despite orders from Homeland Security to rein them in.

As the hunt for Ziva's replacement begins, Gibbs and his remaining team members must head back to work with the past still weighing heavily on their minds.

During an NCIS hit-and-run investigation, Palmer joins a stranger on the outside ledge of a building in an attempt to save his life.

When a former NCIS agent is found dead, the entire team is put in danger as they hunt after the killer.

The team examines whether a Petty Officer is suffering from paranoia or if his claims of being followed are tied to a matter of national security.

Determined to locate Ziva, Tony chases leads in Israel in search of her current whereabouts. Meanwhile, Gibbs and the team continue the hunt for Parsa and his growing terrorist ring.

When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime.

Ziva's homecoming to Israel with Gibbs and the team is not a happy reunion with her father, the enigmatic and powerful head of Mossad. As tensions rise, Gibbs is forced to make a decision that sends shock waves through NCIS.

Still stressed over Kate's death, Gibbs is even more hurt when Ari kidnaps Ducky and decides to play with his mind. Gibbs sends Tony to follow Ziva, and after Jenny and Gibbs are almost shot to death, he is even more determined to finish once and for all with Ari, and Ziva's strange connection to Ari will be just the help that he needs.

Complications arise when the NCIS team discovers a link between a murder victim and the current boyfriend of Gibbs and Agent Fornell’s ex-wife.

The lives of NCIS members are in jeopardy when they come face-to-face with the infamous Port-to-Port Killer.

In the aftermath of an event that strikes close to home, the NCIS team unites to seek answers and demand justice in order to protect their most vulnerable colleagues.

Ernie Yost, an elder Marine veteran confesses to murdering his best friend almost 60 years ago in a war battle. The NCIS's job is to solve the secrets and save Ernie from prison.

After discovering the Secretary of the Navy was bugged during a confidential briefing, NSA Analyst Eleanor Bishop, who predicted the security breach in exact detail two years ago, partners with the NCIS team on the case.

A port authority officer's murder reveals a possible location for Parsa, while Bishop reveals a past connection to the terrorist.

After a malnourished and confused 9-year-old is found hiding in a storage unit, NCIS reopens an old missing persons case when the girl is believed to be the daughter of a Navy recruit who disappeared 10 years ago. Also, Bishop discovers notes that Special Agent Ziva David kept on the case long after NCIS officially stopped investigating.

Gibbs teams up with FBI Agent Fornell on a joint NCIS/FBI investigation after Fornell becomes the target of a shooting, but they face an unexpected twist in the case when their mutual ex-wife, Diane Sterling, gets involved.

When a stolen drone is linked to the elusive terrorist Parsa, the NCIS team partners with the Department of Defense, including Gibb’s former girlfriend Hollis Mann, to track down the device before it is used for a large scale attack.

The team tries to track down a serial killer, while Abby heads south of the border to give a speech with McGee in tow.

In retaliation for the murders of Eli David and Jackie Vance, the NCIS team feverishly searches for Bodnar despite orders from Homeland Security to relinquish the case.

Director Vance gives DiNozzo a special assignment to bring home an Admiral’s daughter from Paris, but he must turn to his NCIS team for help after he enters a controversial crime scene.

A terrorist holds Ducky, Gerald, and Kate hostage while NCIS investigate how exactly the terror organization member got a job at a Navy base.

The NCIS team analyzes what secrets could be in the hands of a terrorist targeting the Navy when a high-tech bug is found inside a probationary agent’s tooth.

The team tries to verify the identity of Joe Smith, who claims he served on the U.S.S. Arizona during the attack on Pearl Harbor, and wants to be buried there upon his death.

Gibbs finds himself emotionally challenged when he agrees to investigate a crime connected to a friend of his daughter, who passed away years ago, and the investigation leads to a shocking conclusion.

The team is assigned to protect Ziva's father, when his attendance at a NCIS conference leads to some unexpected surprises.

After Gibbs leaves mid-case to help his father reconnect with a former war pilot, Tony and McGee argue over who should run lead on the team’s investigation into the murder of a Marine Sergeant.

After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer.

After new evidence reveals that the Port-to-Port Killer has infiltrated the agency, the NCIS team chases every lead in a race to track him down.

The NCIS team races to track down Ducky and Jimmy after the two disappear while transporting a body from a crime scene.

The NCIS team uncovers a discrepancy with DNA remains when investigating the crash of a military plane that had been transporting caskets.

With NCIS headquarters damaged by the bomb, Gibbs goes on the hunt for Harper Dearing to bring him down once and for all.

The NCIS team, alongside the FBI and MI6, continue an international manhunt for an escaped British spy who has left one colleague fighting for their life in ICU.

The NCIS team searches for answers when the current husband of both Gibbs' and Fornell's ex-wife is suspiciously kidnapped.

As the NCIS team continues its search for a missing Marine, Gibbs and Ziva travel to her last known whereabouts in Afghanistan.

After Ducky is attacked by a man claiming to have information about his half-brother who died decades ago, the NCIS team searches for the perpetrator.

Gibbs continues to work with Captain Wescott while he retraces his steps in order to help the NCIS team track down a terrorist.

The NCIS team tirelessly search for Gibbs and McGee two months after they were last seen fighting an elusive group of rebels in a Paraguay jungle.

In an effort to find the terrorist Parsa, Gibbs and the NCIS team track down one of his cohorts using evidence from the drone attack.

The NCIS team tracks a Navy Lieutenant's killer after a Pentagon security camera reveals a Petty Officer committing the crime.

To Gibbs' displeasure, Special Agent E.J. Barrett returns to lead the investigation of a seaman's death that may be connected to a series of port-related murders.

After a Navy officer is found dead on a rural road, the NCIS team must ascertain if the murder was the result of a bar fight or because he knew too much about an attack on a fellow female officer.

When a Marine photographer disappears prior to providing his testimony in an Army court-martial hearing, the NCIS team investigates both the murder he witnessed as well as his current piece on military veterans who are homeless in the D.C. area.

Tony is accused of murdering a woman whose body was found at Quantico and the team must prove his innocence.

When evidence reveals an NCIS team member is a hitman’s latest target, the team must search through old case files to determine who is seeking vengeance.

Torres relies on his team's investigative skills after he wakes up on a dilapidated fishing boat and is covered in blood and unable to remember the last 12 hours.

When a Navy Lieutenant Commander is found dead in a building under construction, NCIS must search for a killer while dealing with interruptions from her distraught detective husband.

After the terrorist's attack, the NCIS team are shocked and are trying to cope with Kate's sudden death, each in their own way. Now, their mission is to collect all the possible info on Ari and find a way to stop him before he does any more damage.

While investigating a mysterious death on a top-secret Naval research ship at sea, the NCIS team board the abandoned ship and find a deadly secret that may cost them their lives.

When a Navy Lieutenant becomes the victim of radiation poisoning, the NCIS team must find the person who's behind the crime. The Lieutenant, who is working for the International Atomic Energy Agency, claims that only his two colleagues knew about his assignment, and whoever it was, the person tried to stop the Lieutenant's next investigation.

The NCIS team undergoes mandatory psych evaluations while investigating the death of a Naval Commander.

An explosion at a D.C. event that results in a casualty connected to the agency changes Parsons’ perspective on Gibbs and the NCIS team.

The team is forced to rely on information from questionable sources while trying to stop a criminal bent on stealing government secrets.

The NCIS investigation of a fire on a Navy vessel reveals evidence that elevates security at all U.S. Navy facilities worldwide.

The team scrambles for answers after a shocking ambush reveals a new twist to their current investigation.

The NCIS team must uncover the truth behind the murder of a jail guard which resulted in a prison riot and McGee being held captive by the inmates.

As the NCIS team investigates a teenage girl’s abduction, Ziva and Abby work closely with her young friend who witnessed the kidnapping. As the investigation unfolds, Gibbs seeks help from a past contact, Miranda Pennebaker, a well-connected woman with questionable morals.

When a burnt and mummified body of a missing and wanted person is found in a furnace on a Marine base, NCIS must work with the FBI. The burnt man turns out to be a serial killer.

A strange delivery in a box arrives at a Navy facility. The delivery driver and a Navy MP officer discover it is a sailor's corpse.

The NCIS team investigates copy-cat crime scenes while Gibbs navigates two ex-wives relentlessly trying to get his attention.

When bodies of two hired assassins are delivered to the NCIS team, Ziva and Tony go undercover assuming the victim's identities in order to find the person who hired the assassins for their mission. Gibbs discovers that his team are not the only ones working on the case.

The NCIS team takes on a renowned hacker who could hold the key to tracking down the most-wanted cyber-terrorist in the world.

Former FBI Agent Tobias Fornell pleads with Gibbs to do whatever is necessary to take down drug dealers and suppliers in the area after his daughter, Emily Fornell, is hospitalized from an opiate overdose.

Gibbs and Special Agent Pride chase leads in New Orleans after evidence points to a copycat of the infamous Privileged Killer. DiNozzo, McGee, and the FBI continue to track political connections to the case from D.C.

The NCIS cyber case turns into a united global effort after evidence confirms “The Calling,” an international terrorist group that recruits children through the internet, has been purchasing S-bombs off the black market.

Gibbs and the NCIS team partner with a Coast Guard Investigative Service (CGIS) Agent to solve the murder of a Marine gunned down on a dinner boat.

The NCIS team uncover a huge secret, as their mission to capture La Grenouille comes to an explosive and deadly conclusion.

Gibbs must take desperate measures to protect his loved ones with Paloma Reynosa still on the loose.

After returning to her job at the Department of Defense, McGee’s girlfriend Delilah finds a break in a controversial case, prompting her to turn to the NCIS team for help.

When a Navy SEAL vanishes during an unsanctioned trip, Gibbs, McGee, and Torres travel to an unpopulated area in Paraguay that's teeming with violent rebels.

Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead by family and friends, and what led to her return.

Gibbs and his team are searching for a cyber serial killer who takes videos of his victims. The team quickly finds out that the videos of the dead victims are false.

After a mysterious illness strikes children from military families, Gibbs and the team investigate the cause. Abby and Jimmy partner with the Naval Medical Research Center to determine the strain of illness, all in hopes of delivering a cure before the holidays.

The NCIS team re-examines an ambush on a group of Special Ops snipers in Iraq after an American couple is attacked in the same area six months later.

When a 14-year-old foils a home invasion, Gibbs suspects the teenager is withholding pertinent details.

After a warehouse fire reveals missing Navy documents, posing a potential threat to national security, the NCIS team joins the Baltimore P.D. investigation, reuniting Tony with a boy from his past.

NCIS feverishly investigates a global terrorist group that is recruiting teens via the Internet, following a deadly bombing overseas that results in an emotional and surprising loss for the team.

Gibbs and McGee head to Alaska while the team works at home to uncover the conspiracy behind the serial killer.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside.

While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak while Gibbs and Marcie realize the killer they've been tracking may be onto them.

Gibbs questions Vance's motives when he is asked to interrogate a teenage boy accused of killing his retired Marine father.

When a Navy Captain is found dead with an unusual costume hidden under his uniform, NCIS uncovers a secret society of real-life super heroes and must track down the villain.

When a weekend call to the NCIS tip line from an unknown source about possible terrorist activity results in the death of two agents sent into a trap, the NCIS team will have to find out who were the people responsible with the help from Agent Paula Cassidy, who holds herself responsible for the tragedy.

A decomposed body is discovered in a tub of acid at a Naval base and Ducky and Abby learn that the victim was a submariner. However, there have been no reports of a sub crewmember missing.

After uncovering faulty bulletproof vests in a truck filled with stolen U.S.M.C. merchandise, the NCIS team attempts to locate both the source and any vests that had been shipped to military personnel overseas.

When a coast guard officer is gunned down on a cargo vessel, the NCIS team searches for the killer, but finds a Lebanese family seeking refuge on American soil.

An investigation into the murder of a Navy Commander leads the NCIS team to E.J. Barrett’s whereabouts.

Sloane is adamant that a man who held her hostage and tortured her years ago in Afghanistan, and was believed to have been killed following her rescue, is alive and in D.C.

After Anthony DiNozzo, Sr. is found in a car with a dead body in the trunk and no memory of the previous night, the NCIS team must figure out if he is capable of murder.

Gibbs must face the consequences of helping Ziva with "the one thing" she said she'd take care of before returning to her family.

A Petty Officer is gunned down in a billionaire’s Ferrari and the investigation leads the NCIS team to discover a link to a man Gibbs was named after.

When Jenny returns from her European trip, the entire NCIS team will be forced to take a Homeland Security polygraph test, and the deepest secrets of each agent are about to be revealed. Plus, an unarmed Tony and Jeanne are held hostage by a ruthless drug dealer.

When a high-level Marine intelligence officer is found murdered in a small motel room, the NCIS team must find the person who murdered her. After discovering that she was already dead for three days, and that the town authorities already "investigated" the crime, Gibbs is determined to solve the case.

When a dead body of a sailor is found in an abandoned part of the town, all the evidence seem to point that the person died from a drug overdose, but when the team uncover more evidence, it turns out to be a murder.

The dead body of La Grenouille surfaces and the entire NCIS is put under investigation by the FBI, with Jenny as the prime suspect for his murder.

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

The NCIS team must rely on Twitter for a case involving a missing Navy Lieutenant.

A Navy bank has been robbed. NCIS is responsible for the investigation. One of the new recruits assigned to the fraud unit, Special Agent Dwayne Wilson, joins the team to help.

While stuck at the Dulles airport due to inclement weather, DiNozzo, Bishop, and her husband Jake work an NCIS case involving an elevated terrorist threat at Northeast airports during the Thanksgiving travel surge.

Gibbs and the NCIS team have to find answers regarding Tony's months-long assignment when an NCIS agent is found dead.

When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the NCIS team is assigned to investigate the strange case for one of their own.

A dead Marine's day job at a government think tank leads Gibbs and the team into the life of a 12-year-old prodigy who may be the killer's next target.

A media frenzy surrounding an unidentified criminal prompts Gibbs’ barber to question his son’s involvement and ask for Gibbs’ help in ruling out his son as a prime suspect.

Someone winds up dead when DiNozzo confronts a man impersonating a Navy officer.

When Ziva is framed for a political assassination, she must avoid the FBI and deal with the consequences without Gibbs' help, who is now enjoying his retirement.

During the week of Christmas, the NCIS team is forced to work overtime when they discover their prime suspect had been dead for 17 years.

After Torres and Bishop are victims of a hit-and-run, Torres fights for his life in the Intensive Care Unit.

When a Navy Captain is killed in a hotel room, NCIS must track down and protect his very pregnant companion from unknown assailants.

While on the flight back from Paris, Tony and Ziva realize that their assignment to protect a government witness in an embezzlement case is in great danger when they learn that an assassin is located on the same flight.

With their lives in danger, Gibbs and Ziva’s rogue investigation takes an unexpected turn when a possible terrorist plot is revealed.

The terrorist from Bêtte Noir returns with a plan to attack the President. Gibbs and his team follow the clues to reveal his identity and find Kate who is kidnapped.

While trying to track down a delusional and violent Marine who thinks he's still in Iraq, the NCIS team learn that the man has been the subject of a secret experiment - and it comes with a high price to pay.

The NCIS team searches for the person and motive behind a contract killer targeting a Navy Lieutenant Commander.

After catching an international arms dealer, the NCIS team learn that the Navy's highly classified weapons system will be sold to arms dealer La Grenouille. To stop the transaction, the team send Ducky undercover.

McGee is under high pressure during the murder investigation of a Petty Officer based on the character for his latest book, with very little information to go on.

After NCIS finds a secret government bank account that’s funding a nationwide network of vigilante justice, the team must determine who is acting as judge and jury.

While the team takes a missing person case, Tony is disturbed by Ziva's way of coping with her father's death.

While working on an assignment, Gibbs is seriously injured in an explosion, and taken to a hospital, where he recalls his painful past, which he has always hidden from others. The rest of the team must proceed with the investigation and put their feelings towards Gibbs' injury aside.

The NCIS team must stop a teenage student from detonating a bomb attached to his body, while he's taking the other students hostage at a Quantico base high school. Gibbs tries to stop him when he enters the classroom, only to realize that there may be someone else controlling the teenage student from the outside.

When a former NCIS agent's body washes ashore in New Orleans, Gibbs reunites with NCIS Special Agent Dwayne Cassius Pride to determine if the murder was politically motivated or related to a well-known case.

Gibbs and the team help Ziva with the "one thing" she said she'd take care of before returning to her family.

The Coast Guard Investigative Service works with the NCIS team when an explosion occurs on an oil rig.

It’s Christmas time and Tony DiNozzo can’t decide if he’ll be naughty or nice when his dad, Anthony DiNozzo, Sr., comes to town for a visit.

The NCIS headquarters are evacuated after the team discovers a body as well as bomb materials on the roof of the squad room.

When a government scientist goes missing, Abby is recruited to carry on his work, but the team worries that she may meet the same fate as her predecessor.

When a Petty Officer is found murdered, Gibbs learns about the mysterious connection between the disbanding of his team and the case.

The team is forced to take another look at a hit-and-run murder case.

The team suspects foul play when a healthy, young Petty Officer mysteriously dies in his sleep aboard a Navy destroyer.

A "meat puzzle" starts when Ducky identifies the pieces of three bodies that were stuffed inside a barrel a few months ago. They turn out to be bodies of a judge, prosecutor, and jury foreman that worked with Ducky on a rape case ten years ago.

When a six-year-old boy informs the NCIS team that his father was kidnapped, the team discover that the missing father is actually a Lt. Commander working on a secret project named Honor, and that he is the only one who has the code that can open the project.

Director Vance is notified by the Pentagon that the nuclear submarine Gibbs and Bishop are aboard to conduct a murder investigation has gone radio silent.

A murder investigation prompts Gibbs and the team to play family counselor to his former mentor, Mike Franks, in the hopes of preventing a bloody international conflict.

McGee breaks the rules, risking his NCIS job, to help his sister Sarah, who shows up disoriented and bloodied. While he works on figuring out what happened to his sister, the NCIS team are investigating a case of a Navy sailor, who is somehow connected to Sarah.

The team discovers the bizarre death of a Marine and his two friends may be linked to their past, but its Gibbs who ends up taking a trip down memory lane.

When Ducky realizes that one of his cadavers used for research is actually a victim of murder, the NCIS team identify him as a criminal genius who is capable of deleting the past.

When McGee is kidnapped while promoting his latest book in the Deep Six crime series, the team investigates his self-professed “#1 fan” – and a potential link to a murder case involving stolen classified documents.

After discovering the remains of a Marine captain, the NCIS team travels to Texas to interrogate the suspected killer.

After discovering a Navy pilot's body riddled with unusual wounds, NCIS' investigation draws the team into the rabbit hole of UFO conspiracy theories.

Gibbs and Fornell attempt to track down the leader of a drug ring who supplied drugs to Fornell's daughter.

The NCIS team is in a race against time to find a missing officer who disappeared during his wedding proposal.

DiNozzo is partnered with his girlfriend ATF Special Agent Zoé Keates after evidence reveals that the murder weapon in an NCIS case was originally purchased for the controversial ATF sting operation “Operation Fast and Furious.”

When a shocking tell-all threatens to ruin Christmas for a decorated Marine, NCIS must uncover the truth and deliver a holiday miracle - before the book hits shelves and turns a hero's legacy into a holiday disaster.

NCIS investigates the fatal poisoning of one of Kasie's forensic scientists.

NCIS investigates a murder related to a car that begins driving on its own.

Torres receives intel from a confidential informant regarding top secret Naval information that's at risk of being sold.

NCIS investigates the case of a Navy reservist whose body is found in a beat-up car at the end of a gun range.

After an unknown shooter causes chaos at an annual Thanksgiving 5K, time is of the essence for the NCIS team to find the culprit.

When an NCIS agent turns up dead and Kasie goes unaccounted for, the team must work quickly to find the killer.

Parker grapples with his emotions when a conman from his past turns up as a prime suspect in the murder of a Navy officer transporting millions of dollars’ worth of opioids.

NCIS is called in to investigate when a Lieutenant returns home on the eve of Halloween to find a surprise party being thrown for someone else at his place.

NCIS stages a fake wedding for two of its own in an attempt to take down the mob.

With the help of Knight's dad, NCIS works to unravel the mystery of a recently used service weapon belonging to a missing agent.

Jimmy is torn between family and work after his father-in-law, Ed, asks him to tamper with evidence from NCIS’ current murder investigation. Also, Ed’s poker buddy, Anthony DiNozzo, Sr., offers to help with the case.

When a petty officer’s death is connected to a blackmail investigation, the team is forced to work with Special Agent Sawyer on the case, which takes a terrifying turn for Torres. Meanwhile, Knight is offered an opportunity to train with NCIS Elite.

The team investigates a U.S. marine who is believed to have kidnapped a man's wife.

Evidence in an NCIS murder case reveals a rare painting on loan had been swapped for a fake, prompting DiNozzo, Sr. to share his knowledge and contacts of the black market art world with the team.

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.

When an old pal of Torres’ comes to him, disheveled and bloodied for guidance amidst an undercover FBI operation and then disappears, NCIS helps track him down.

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

A girls' night out takes an unexpected turn when NCIS is called to investigate the motive of a possible arsonist.

NCIS investigates the case of a Navy Lieutenant found dead at a blood donation bank.

As Vance prepares to host diplomatic talks with Venezuela, the team is called in to investigate the dead body of one of his inside men.

NCIS searches for a missing undercover agent in the midst of an active hostage situation.

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group; Torres gets a call from NCIS Special Agent Jane Tennant to come to Hawai'i. The crossover continues on NCIS: Hawai'i S01E18 T'N'T (II).

After a Navy Lieutenant's death reveals ties to Special Agent Sawyer, Torres and Knight uncover a murder linked to a wealthy family.

A strange case for Gibbs and his team opens when a Navy Commander dies after successful surgery. While researching the commander's past, the team find out that he collected a lot of enemies lately.

The NCIS team looks for a motive behind the kidnapping and death of a famous heart surgeon.

Reeling from his father’s murder, Parker goes to extreme lengths to hunt down the woman he holds responsible, mob boss Carla Marino, jeopardizing not only his own future but the team’s.

Parker’s pursuit of vengeance for his father’s murder could have deadly consequences, while his sister, Navy vice admiral Harriet Parker, faces an impossible choice.

Things become tense when Knight is assigned to protect his wife after the home of a high-level defense contractor is attacked.

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

Vance partners with Gibbs and returns to field duty when a murder case is connected to a former NCIS agent he locked up for stealing evidence.

NCIS investigates the death of a man on a cruise ship whose body is discovered in the ship's sauna by none other than McGee's mother-in-law, Judy.

When the NCIS team engages in Walk-a-Mile day to gain a new perspectives on different departments, things take a turn when Kasie receives a distress call from a mysterious man.

Parker and Knight discover three bodies on an old Navy ship that's about to be sunk and turned into an artificial reef, when they're suddenly locked inside by a mysterious figure.

NCIS works to solve the murder of a senator’s daughter who has a rebellious reputation and large online following.

A covert identity created for one of Gibbs’ undercover cases from 20 years ago resurfaces when a murder victim is found living under the alias.

Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father who left when he was a child.

Parker discovers he's a victim of identity theft while investigating the unusual murder of a Navy ensign.

The NCIS team jumps into motion to investigate who is responsible for a potential bioterror attack at a strip mall parking garage.

After a Marine is found murdered in Quantico hours after calling Gibbs to discuss a possible case, Bishop and McGee go undercover as a married couple to run surveillance on a Marine Lieutenant and his wife.

DiNozzo returns to the military academy he attended as a teen after a murdered Marine, who was an alumnus of the school, is found clutching the photo of a current student.

When a Petty Officer’s murder matches the M.O. of a local serial killer, the NCIS team must determine if this is the killer’s latest victim or the work of a copycat.

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.

NCIS investigates the death of a ride-share driver who was found after a car accident.

A Vice Admiral tasks McGee with tracking down the hackers who infected his laptop with ransomware before the virus wipes out all his data. The cyberterrorism escalates when the virus spreads to the whole NCIS office.

NCIS investigates a ring of clever teenage partygoers when a string of break-ins takes place at Marine Base Quantico.

When the body of a sailor is found after a party in an illegal night club, the team investigate a number of possible leads - including blackmail and accidental death.

The NCIS team investigates a series of escalating threats against congresswoman Jenna Flemming, while Director Vance oversees her temporary protection detail.

Gibbs' team investigate the death of a SEAL during a training exercise, and come to suspect that it wasn't an accident, but a murder.

Gibbs and Bishop travel to Afghanistan after the murder of a Marine in D.C. is linked to a terror group holding another Marine hostage overseas.

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 start an investigation after Petty Officer Manda King is found dead in a bartender's bed. The suspect is the owner of a competing club where Manda's sister sings.

Gibbs and the team investigate when a Navy Lieutenant who is set to be the first openly gay service member to receive the Medal of Honor is murdered.

The murder of a Petty Officer sparks a lead in a 40-year-old airport bombing cold case that Gibbs and DiNozzo have been assigned to for the past two years.

The NCIS team investigates the murder of a musician in the Navy’s most elite band that performs at diplomatic events around the world.

The cold case of a small-town death of a naval officer in the ‘90s is unexpectedly re-opened in the present day, sending the team on a manhunt for justice. The crossover starts on NCIS: Origins S02E05 Funny How Time Slips Away (I).

After NCIS learns that the owner of Parker's favorite bakery is being blackmailed, they hatch a plan to save her from the perpetrators.

A Marine's murder has connections to a dirt bike gang that Torres joined while on an old undercover operation.

Agent Knight goes viral for saving a mother and child from a potentially fatal car accident.

When an officer is shot to death on the freeway, the NCIS team take on the investigation. The first lead, a fact that the victim was leading a double life, take them to a possible solution of the crime, but the tables are turned when the victim's dying message is discovered and it leads them to a totally different clue.

A gruesome mishap at a Petty Officer’s gender-reveal party leads NCIS to the case of a missing teacher that was popularized on a true crime podcast.

While investigating the murder of a seaman who was set to testify before a grand jury, the NCIS team uncovers the resurgence of an international human-trafficking ring.

The NCIS team investigate when a seaman's body is found at the bottom of the sea in his dress whites, with a ceremonial sword. They discover that he was addicted to an MMORPG. Now, the team must figure out how involved he was in the game and how far he would go to get revenge on his arch enemy, another sailor.

A supermodel dies while filming a reality show on a Marine base, and the NCIS team must discover who is the model's murderer. They discover a love triangle between the model and three other men, all suspects.

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.

The NCIS team are called in to investigate when a perfectly functioning Marine helicopter is found in the middle of a crop circle.

When Torres receives a text from Jimmy's daughter saying she has discovered a large sum of money near a Naval library, the team works together to investigate.

Laura Rowen, a Marine's wife, shoots an intruder in self defense when he is about to rape her. The team take on the case and find out that the wife is leading a double life while her husband is serving overseas.

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.

NCIS investigates the death of a college student who was killed while running across the street and had connections to McGee’s wife, Delilah.

When a trio of combat vets are found murdered in a D.C. motel room, NCIS tracks down a suspect who refuses to talk to anyone but Sam Hanna.

A Petty Officer is found murdered on a golf course, and McGee spends hours on the victim’s ham radio trying to locate a key witness.

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

Gibbs calls on the team to assist DEA Agent Luis Mitchell with a case that keeps going cold, but DiNozzo discovers there is more to Gibbs’ personal connection to the agent and his desire to help him succeed.

When a missing MI6 officer is linked to a murdered Petty Officer, Gibbs sends Quinn and Bishop to Philadelphia to work with MI6 Officer Clayton Reeves.

When Sloane’s name is discovered in Afghanistan at the site of an abandoned bus with a dead driver, Gibbs accompanies her on a trip to find a group of girls who were kidnapped from the bus.

While investigating a Marine’s murder, the NCIS team uncovers a labyrinth of live-streaming spy cameras hidden in the rooms of a Virginia motel.

The team are looking for an ex-SEAL who escaped from prison in search of revenge. He is determined to find the real murderer of his wife.

The death of a boxer leads Vance to borrow the NCIS team and start investigating his death, while Gibbs digs into Vance's past.

After a Petty Officer’s son is found murdered at his “welcome home from prison” party, evidence suggests Kasie’s lifelong best friend, Dante Brown, is the suspect.