NCIS

A murder aboard a museum ship becomes a cryptic treasure hunt when a dying Navy captain leaves a final clue; to solve it, the team must decode what was worth killing -- and dying -- for.

With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside.

NCIS investigates the death of a Navy lieutenant whose body was found at a construction site; Ziva thinks about her future.

The team looks for answers when the current husband of Diane, Gibbs' and Fornell's ex-wife, is abducted.

An investigation begins after a contract assassin targets a Navy lieutenant commander; information about Abby's family emerges after tests for a kidney donation.

The team finds a problem with the DNA samples collected while investigating the crash of a military plane that was transporting caskets.

Ziva and Gibbs head to a missing Marine's last-known whereabouts in Afghanistan; Tony's fears are revealed.

Following the bombing of NCIS headquarters, the team engages in a cross-agency manhunt for Harper Dearing.

The investigation of a Navy commander's murder leads the team to E.J. Barrett, and a second death prompts the team to protect E.J. as they hunt the killer.

Gibbs questions the choices he has made during the course of his life when a man pulls a gun on him at a diner.

Security at a Naval research laboratory is in jeopardy after a petty officer's murder links to an arms dealer; probationer Ned Dorneget sucks up to Gibbs.

When a Navy captain is killed, the team must find and protect his pregnant companion; Jimmy brings his fiancée's father to work.

An investigation into a fire on a Navy vessel leads to a discovery that elevates security at Navy facilities worldwide; Ziva and DiNozzo are called in when an explosive device is found on a ship in Italy.

Gibbs clashes with Dr. Samantha Ryan (Jamie Lee Curtis) of the PsyOps Division when a Navy reservist is found dead from a suspected suicide; DiNozzo sees McGee's paycheck.

The team investigates when the body of an NCIS facilities manager is found four months after she went missing; as the team faces mandatory psych evaluations, Gibbs is concerned about Abby's recurring nightmares.

The team works with the Baltimore police to investigate a warehouse fire that revealed missing Navy documents that could potentially threaten national security; Tony reunites with a boy from his past.

The team searches an abandoned cargo vessel for a killer after a coast guard officer is gunned down; McGee and Tony search for Gibbs' perfect match.

A dead Navy captain dressed in an unusual costume underneath his uniform leads the team to discover a secret society; DiNozzo is forced to work with his ex-fiancee (Perrey Reeves).

Anthony DiNozzo Sr. (Robert Wagner) is found in a car with no memory of the previous night and a dead body in the trunk; Tony goes against orders as he tries to establish his father's innocence.

The investigation into a petty officer's murder leads the team to its prime suspect: Director Vance's brother-in-law.

Tony helps Ziva and her mentor look for a missing Marine lieutenant in Colombia; Jimmy Palmer chooses his best man.

When classified information is leaked, the Secretary of the Navy (Matt Craven) investigates alongside Gibbs and Dr. Samantha Ryan (Jamie Lee Curtis).

Evidence reveals that a Navy lieutenant was killed by being force-fed too much liquid; Gibbs meets Ducky's new romantic interest (Cheryl Ladd).

Shaken by terrorism, the NCIS faces devastating surprises; the case impacts Jimmy Palmer's destination wedding.

As the team searches for a terrorist targeting the Navy, a bug is found in a probationary agent's tooth; Jimmy Palmer has a bachelor party.

The NCIS team finds an infamous hacker who could lead them to the world's most wanted cyberterrorist.

A Navy reservist asks the team for help when she realizes her husband is missing and her living room is covered in blood; Tony thinks Ziva is planning to avenge her father's death.

When Jimmy and Ducky disappear while transporting a body from a crime scene, the team races to find them.

When FBI Agent Fornell becomes the target of a shooting, he and the NCIS team launch a joint investigation; rumors run wild when Diane, the ex-wife of both Gibbs and Fornell, spends the night at McGee's.

As the team searches for an abducted teenager, Abby and Ziva work closely with a friend of the girl who witnessed the kidnapping; Gibbs turns to a former contact for help; Tony is jealous when Ziva makes plans with another man.

While on leave as he mourns the loss of his wife, Director Vance uncovers information that makes him question everything.

The investigation into a car accident that killed a Marine and a young woman brings up upsetting childhood memories for Abby; Ducky says the crash may not have been an accident.

When a helicopter crew's training mission ends in a disastrous crash, the NCIS team must figure out what happened and find the missing pilot; Ziva challenges McGee and Tony to a dare.

Ducky orders the exhumation of a body from a 12-year-old case; the team investigates a Marine's death.

Gibbs' barber asks for help when he suspects his son is involved in a high-profile crime; the team looks into the disappearance of Navy funds.

A woman asks the NCIS team to investigate the death of her husband, a Marine who specialized in K-9 bomb detection; Vance interviews nannies.

As the team investigates a connection between a dead journalist and a Navy petty officer, Ziva is surprised by a visit from her father (Michael Nouri).

When a Navy lieutenant is killed in a brutal attack shortly after returning home from the Middle East, the team questions the victim's friend, a Marine captain with post-traumatic stress disorder.

Capt. Westcott continues to help the team track a terrorist; Abby is excited about the NCIS Thanksgiving dinner; Tony is curious when he learns that Ziva is making special plans.

After an event that hits close to home, the team unites to find answers and protect vulnerable colleagues.

The team investigates a murder on a U.S. Navy ship; tension rises when McGee learns that his estranged father is one of the suspects.

When a petty officer is shot in a billionaire's car, the investigation leads the team to Gibbs' namesake.

Tony's father (Robert Wagner) visits for Christmas; as the team tackles a murder investigation, Abby can't contain her excitement over holiday festivities.

Tony is suspected of murder when part of a female body is found at Quantico, and Abby makes it her personal mission to find out who is framing him.

A 6-year-old boy tells the NCIS team that his father, an officer working as the Navy's liaison with a defense contractor on a highly confidential project, has been kidnapped.

The team bands together to clear McGee's name when he kills an undercover police officer while on assignment.

When a dead staff sergeant is found encased in a Civil War-era tomb, a cell-phone within it leads investigators to a safe deposit box.

Members of the NCIS squad investigate when a petty officer with a double life is gunned down on a freeway.

Two bored housewives, whose husbands are serving in Iraq, begin running an Internet sex site from their bedrooms, then both of them disappear mysteriously.

When the bodies of two assassins are delivered to NCIS from overseas, Tony and Ziva go undercover to find the intended targets.

While investigating a naval commander's death, the team undergoes required psych evaluations.

Dinozzo's father (Robert Wagner) returns and plays an important role in a murder investigation.

Abby becomes fixated on solving a murder; DiNozzo's latest fling leads to an interesting Halloween.

The team uncovers a sinister plan when a controversial DJ and a naval officer are shot to death.

After a suicide bomber tries to assassinate the Belgravian Defense minister, the team must protect his daughter, who is studying in the U.S.; Gibbs looks into the death of a Marine who was killed in the bombing.

Following a deadly attack, one member of the team reminisces.

The team must protect Ziva's father when his attendance at a convention leads to surprises.

A Naval petty officer and sole witness in an upcoming murder trial disappears.

The team investigates when a Marine is found beaten to death in his backyard.

The death of a supermodel filming a reality show on a military base first appears to be suicide, but Gibbs and his team uncover a twisted love triangle and hunt for her killer.

Dr. Mallard's predecessor, Dr. Magnus, joins the team to help solve a murder at a college fair.

The team hopes to avoid an international incident when an American officer is killed on a British ship.

The team partners with a Coast Guard Investigative Service agent to solve the murder of a Marine on a dinner boat.

The team investigates a bomb tech's guarded personal life after she is attacked.

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

A girl's kidnapping turns into something bigger when her grandfather complicates the investigation.

Gibbs puts it all on the line to help a former commanding officer who is running for his life from the government.

A sniper kills Marine recruiters and leaves a white feather behind as his calling card.

With the help of a local sheriff, Gibbs and his team hunt down a possible serial killer targeting naval officers.

When a sailor in Washington receives a package containing a pair of blue eyeballs, Gibbs investigates a former Navy Intelligence agent who is now a private contractor in Paraguay.

A gun-toting man emerges from a body bag in the autopsy lab to take Ducky, Gerald and Kate hostage. Rudolf Martin guest stars.

A petty officer recently returned from duty is found dead backstage at a local bikini contest.

Gibbs and the NCIS team work with a notorious private detective during an investigation of a naval officer found murdered at the bottom of a lake.

A World War II Medal of Honor recipient (Charles Durning) confesses to the murder of his best friend almost 60 years ago.

A Marine records his own death on video, as he falls off a cliff during a camping trip with his wife and his best friend, and Abby tries to reconstruct the camera, putting her technical skills to the test.

Tony goes undercover as an escaped prisoner chained to a convict who holds the key to recovering stolen Iraqi art, but when his GPS device fails, the team must find other ways to locate him.

Ducky insists that the suicide of a female petty officer, institutionalized for a nervous breakdown, was actually murder.

Gibbs and his team are called to investigate when a fellow NCIS agent is found murdered. Guest star: Tim Kelleher.

The team investigates a telemarketer's report of the murder of a petty officer after hearing it over the phone, and it appears to be a hoax until the body of the officer is found.

When a Marine's wife kills the intruder who tried to rape her, Gibbs and his team realize they are tracking a serial rapist and killer who uses a racy website to stalk his prey.

Gibbs and his team investigate when the decomposed body of a woman in a wedding dress is found in a subterranean cell decorated to resemble a 1950s bedroom.

Gibbs and his team investigate the unusual case of an unpopular Navy commander who, after successful open-heart surgery, apparently burst into flames.

When a young woman is found dead in a storage unit, a Navy medic who died saving lives in combat becomes the prime suspect, and it is up to Gibbs and the team to clear his name.

The team works to collect all the evidence they can in an effort to stop Ari.

The team investigates a Navy lieutenant's rape and murder; Ducky fears the killer is linked to an unsolved murder that has been haunting him for years.

Gibbs meets with a serial killer days before the man's execution to find out about missing bodies, but the inmate won't reveal the information, so Gibbs assembles a team to reinvestigate.

When a Marine explosives expert disappears outside a nightclub, Gibbs and his agents are summoned to investigate.

When a female petty officer is found dead in the bed of a dance club bartender, the team suspects the officer's sister (Mya Harrison).

Gibbs and the team investigate the murder of a Marine in an ROTC unit and quickly find a suspect, but they must start all over again when someone kills the suspect as well.

Gibbs finally comes face to face with Ari, the Bête Noir terrorist who had wounded him before escaping.

Gibbs and his team face a challenge when the wife and 9-year-old daughter of a Navy captain are kidnapped from their home, and the captain is held hostage in his own office.

Gibbs and his team are called to investigate when the grisly remains of a Marine ordnance specialist are found.

When Tony opens a letter releasing a mysterious powder from inside, he and Kate are put into biohazard isolation as a precaution.

The NCIS team's assignment is to protect an Iraqi War veteran being targeted by terrorists.

The discovery of a civilian's body in a Marine bombing range leads the team to uncover a Mafia dumping ground, and Gibbs' partner, agent Fornell (Joe Spano), is accused of aiding the Mafia.

When bodies found stuffed in a barrel are identified as a prosecutor and a sheriff who worked on a rape and murder case with Ducky 10 years ago, Gibbs believes Ducky may be the next target.

Gibbs, still recovering from his gunshot wound, pushes the team to investigate the body of a bludgeoned sailor, found at an illegal nightclub.

Gibbs and his team believe the accidental death of a Navy SEAL, during a routine exercise, was murder.

The FBI is searching for a terrorist assassination team in Washington, D.C., when agents learn the team's target is not a government official but Gibbs.

Gibbs and his team track a former Navy SEAL (guest star Tim Abell) who escapes from prison looking for revenge.

When a Marine helicopter appears in the middle of a crop circle, Gibbs and the team investigate and encounter a town convinced that extraterrestrials played a role.

A computer expert (Danica McKellar) claims to have witnessed a murder in the apartment across the way, but investigators find no physical evidence of a crime.

A teen at a high school on Quantico Marine Corps Base attaches a bomb to his body and holds his fellow students hostage.

Abby becomes the target of a stalker, sending the team into protective overdrive, searching for the person who is out to get her.

Tony and Ziva become trapped in a container while investigating the possibility of weapons smuggling at a shipyard.

The team investigates the death of a missing lance corporal, whose body was buried in the backyard of a vacant house and then exhumed.

The commander in charge of a shipment of nuclear weapons seems to have been abducted, and Gibbs and his team work quickly to find her and protect the classified location of the armaments.

NCIS temporarily reinstates Gibbs when an escaped convict threatens his friend's life.

The team is called to the scene of the murder of a petty officer who was part of an undercover arms operation.

When an ambulance mysteriously explodes while transporting the remains of a Marine, Gibbs and the team find that identifying the remains is harder than they had expected.

Gibbs and the NCIS team make a disturbing discovery when they bust an illegal automotive chop-shop run by Marines.

Gibbs suffers a temporary memory loss as he recovers from his injuries; the team tries to prevent a terrorist attack on the U.S. Navy.

Gibbs and the team investigate when the body of a missing Marine is found in a frozen lake.

Ziva finds herself under investigation for the death of a suspect; Director Shepard is kidnapped.

When the wives of two Marines are murdered, the team fears the murders are racially motivated and works together to find the killer.

Suspicious activity surrounds a decorated Marine veteran's death, leading the NCIS team to try to clear his name.

NCIS team members search a missing Marine's campsite and realize he was not alone, so they search for his camping partner, a woman who may still be alive.

Gibbs' team works with the Army Criminal Investigative Unit to investigate a suspected terrorist attack that killed a Marine colonel at a military country club.

The NCIS team must learn to work without Gibbs, who has retired; Ziva witnesses a political assassination and the FBI wants her.

While searching the abandoned and bloody car of a missing Navy lieutenant, the team learns she had been profiling men to find the perfect mate.

The NCIS team joins forces with the FBI when a burned and mummified body found in a furnace turns out to be that of a serial killer the FBI had been chasing for more than a decade.

McGee takes things into his own hands, forgoing NCIS procedure, when his sister arrives on his doorstep, bloodied and confused.

Gibbs and his team must investigate the apparent suicide of a Pentagon cryptographer some suspected of spying.

The NCIS team investigates when a Marine is attacked in his home and his daughter is kidnapped on Halloween; Abby's Halloween costume leaves McGee and Tony speechless.

The discovery of two dead bodies in a forest leads the NCIS team into the wild world of modern-day treasure hunting; Gibbs and Fornell get deeper into their search for the opioid kingpin.

Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and to Ducky.

Gibbs and Fornell attempt to track down the leader of a drug ring who supplied drugs to Fornell's daughter; the team deals with the case of a missing cadaver from the NCIS autopsy room.

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.

An investigation into a Marine's murder leads to a surprising discovery; Abby and McGee head south of the border.

While investigating a Marine's shooting, the team uncovers more to his life than anyone would have imagined.

The team turns to Holly Snow for help when a Navy officer's death is connected to a prostitute.

Fornell, Gibbs and the team try to bust an illegal trucking operation after a driver is found dead.

When an assassin targets the government's key witness in an embezzlement case, the team must help the witness make it home alive.

The team and Coast Guard Investigative Services join forces when a Navy diver seeking sunken treasure is murdered.

A terrorist group threatens to detonate a dirty bomb in Washington, D.C.

Gibbs, Fornell and the team try to determine the truth when a polygraph specialist's night job leads to murder.

Secrets arise when Gibbs' former mother-in-law (Gena Rowlands) becomes a witness in a murder investigation.

DiNozzo gets overly involved in the search for a murder victim's missing sister.

Gibbs makes shocking discoveries while investigating a respected colleague's murder.

Gibbs goes to Mexico to confront a drug cartel intent on revenge; Gibbs has to make a devastating decision.

McGee and his wife Delilah's Bahamian vacation turns into a high-stakes mission; Gibbs fears the worst when his search for Fornell leads to blood.

Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriff's residence that's now a historical site, only to find themselves locked in abandoned jail cells there.

As the NCIS team searches for Gibbs after wreckage from his boat is discovered; they find out he was tracking a serial killer with journalist Marcie Warren, who wrote an exposé on him.

When members of an NCIS Regional Enforcement Action Capabilities Training Team are killed during an explosion, NCIS Special Agent Jessica Knight, the lone surviving member, helps crack the case using high-tech body armor.

Vance assigns McGee, Torres and Bishop to COVID compliance duty at a foreign affairs summit, where they discover a link to another NCIS team's murder case.

Gibbs and Fornell's crusade to find the head of the drug ring responsible for Fornell's daughter Emily's overdose comes to a climax; Gibbs and Vance finally let the team in on a case that has dangerous implications.

The team investigates a biker killed in a hit-and-run; Gibbs prepares to testify against a financial adviser who stole millions from his Navy clients.

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

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

NCIS investigates the murder of a Navy officer who was killed while driving home a recently released inmate; Gibbs helps Palmer deal with a personal trauma.

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; a hacker emails compromising information to the Taliban.

NCIS tracks a stolen laptop to the uncle of a young boy, Phineas, Gibbs' former neighbor.

The team uncovers a secret dogfighting ring, which leads to an unexpected move by one of the team members.

NCIS dives into the competitive world of food trucks after finding a man frozen to death in the back of one.

A murdered Marine's fingertips and teeth are found in a stolen purse.

The brutal murder of a former investigative assistant connects to a crew planning to rob a woman's warehouse; a new special agent (Sarah Jane Morris) arrives at the office.

Gibbs is suspicious when Vance asks him to interrogate a teenage boy accused of killing his retired Marine father.

A message in blood left by a murdered officer leads NCIS to a manuscript that may contain classified information.

Special Agent Barrett investigates a death she believes is connected to a series of murders; Ziva introduces her boyfriend to the team.

Thanksgiving plans are put on hold while the team investigates the horrific death of a Marine.

The team helps Vance face his demons while uncovering a complex relationship with a killer that endangers his family.

When the enlisted son of a preacher, who was a colonel, is found dead, the team thinks he may be the victim of a hate crime; Gibbs' father visits for the holidays.

Gibbs questions DiNozzo's ability to do his job when the elder DiNozzo gets involved in their latest investigation.

When a Navy pilot is found dead in a secluded area, the team must battle a no-nonsense attorney with a hidden agenda.

The team's investigation into a lieutenant's death is connected to a citywide blackout.

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 are onboard.

When a hotshot financial adviser is found shot at a naval station, NCIS investigates the case by interviewing the victim's 3D hologram of herself, which she created before her death.

NCIS investigates the death of a man on a cruise ship whose body is discovered in the ship's sauna by McGee's mother-in-law.

The NCIS team investigates the death of a Navy commander whose body suddenly explodes before Jimmy can examine it.

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

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

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.

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

When an infamous arms dealer 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.

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

A Navy reservist's body is found in a beat-up car at the end of a gun range; Kasie weighs the pros and cons of buying a gun.

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

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

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 Hawaii.

While investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly biotoxin; the NCIS team calls on Dr. Carol Wilson for help as they race to find the antidote; Torres tries to distract Jimmy's daughter.

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

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

With Special Agent Alden Parker still on the run with his ex-wife, the team investigates who from his past might have a personal vendetta against him in hopes of clearing Parker's name.

NCIS investigates the unexpected death of a Navy reservist who was an investigative journalist; Knight and Jimmy's budding romance is put on hold when a vital organ transfer goes fatally wrong.

When Parker is framed for murder, the team members put their jobs and lives on the line to buy time and uncover the truth.

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.

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

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.

The NCIS team must help Torres when he puts his future at stake by confronting the man who tormented his family when he was a child.

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; McGee prepares to be a contestant on a popular game show.

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

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.

The NCIS team jumps into motion to investigate who is responsible for a potential bioterror attack at a strip mall parking garage; Knight's father deals with a health scare while in Japan.

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

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

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.

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

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

NCIS must investigate a string of Russian spy encounters that may be linked to a suspicious murder; Jimmy accidentally makes a confession that could change the course of his relationship with Knight.

NCIS must investigate the secretary of the Navy when her husband claims she tried to murder him.

Parker grapples with his emotions when a con man from his past turns up as a prime suspect in the murder of a navy officer.

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.

NCIS works to solve the murder of a Marine private who appears to have been killed for helping an Afghan refugee; Jimmy navigates the pressure of parenting his teenage daughter, who is eager to go out on an unchaperoned group date.

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

NCIS agents from Washington, D.C., Los Angeles and Hawaii, in D.C. to attend the retirement party of a beloved Federal Law Enforcement Training Center professor, find themselves investigating his shocking suicide.

After 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.

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.

While investigating a death aboard a top-secret naval research ship in the middle of the ocean, the team discovers an abandoned ship and a deadly secret.

While investigating the assassination of a Navy admiral, the team meets a woman searching for her husband, a political refugee from Africa.

Gibbs and Lt. Col. Mann investigate the murder of a Marine captain who had access to highly classified information; a witness in the case turns out to be Gibbs' ex-wife.

A suicide attempt turns into a murder investigation when the team must talk a distraught naval officer out of jumping off a roof.

Gibbs finds himself on an emotional journey into his past when he agrees to help the childhood friend of his now-dead daughter.

The team believes a Marine is being groomed to become a super soldier.

Abby risks her career in defense of a dog that authorities believe is behind a fatal mauling; Gibbs tries to ferret out the secret Jenny is keeping.

The search for a trained survivalist wanted in connection with a cold-case murder leads the team into the wilderness.

The team stakes out a warehouse to catch a suspected thief but ends up witnessing a murder; Ducky keeps a secret from the team.

Ducky refuses to autopsy a Muslim Marine found dead near a mosque that the FBI suspects of terrorist recruitment.

After a Navy commander is murdered on a beach, the team watches for a nude female sunbather who may be the only witness.

After digging herself out of a grave, an amnesiac can remember one thing: a bomb is hidden on a Navy ship.

Ducky and Abby help identify a Marine whose severed leg is found in a trash receptacle, then the case takes a turn when the man's identity does not match his official photo ID.

Upon the director's return from a European junket, the team's secrets unravel; a merciless drug dealer holds Dinozzo and his girlfriend captive.

Reeves sees his friend get kidnapped; the prime suspect disappears with confidential military information; an embarrassing photo from McGee's teenage years becomes a popular meme.

Ducky makes a startling discovery that leads to the search for a missing child; Tony struggles to deal with his feelings for Jeanne.

NCIS, FBI and MI6 continue the worldwide manhunt for a British spy who is targeting current and former agents.

Gibbs and the team realize that a cadaver mistakenly tagged as a John Doe is actually that of a career felon with ties to a criminal mastermind.

The team turns to a blind photographer (John Billingsley) to use his heightened senses of hearing and smell to re-create a crime scene and track down a petty officer's killer.

The murder of a Marine brings McGee and Gibbs to Los Angeles for a joint investigation with the NCIS office of special projects; Tony looks into Ziva's personal life.

During an investigation, Abby is trapped in a pharmaceutical lab when armed men enter the building and take hostages.

Two mercenaries are found dead on Gibbs' boat; Gibbs must consider his former mentor in a new light.

DiNozzo is sent to Paris to bring an Admiral's daughter home, but he needs help from the team after encountering a controversial crime scene.

A case escalates into a global initiative when it's discovered that an international terrorist group that recruits children has been buying bombs off the black market.

Gibbs leads the investigation into a murder victim found in a taxi headed to NCIS headquarters; Jenny discovers a secret about her past.

When Gibbs and McGee travel to Russia to escort a computer engineer home, the mission is compromised and they must hide from a Russian mercenary group that is hunting them.

Personal plans are interrupted when errors are found in what seemed to be a straight-forward, closed case; McGee and Delilah argue whether work should be discussed during dinner.

After Special Agent DiNozzo's identity is stolen, the perpetrators use his name to begin blackmailing senators.

The FBI and M16 continue their international manhunt as the escaped British spy leaves one agent fighting for his life in the ICU.

Gibbs and his team board an aircraft carrier to find out how a sailor with no history of drug abuse overdosed on methamphetamines.

Gibbs and his agents investigate when a Marine crashes into a parked car after his parachute fails to open during a training exercise.

The team finds a link between a murder in Washington, D.C., and a terror group holding a Marine hostage overseas; DiNozzo is annoyed that McGee was chosen to be featured on recruitment brochures.

The team travels to Guantanamo Bay in Cuba to probe a Navy translator's death caused by swallowing emeralds smuggled from Afghanistan.

When a Navy officer is murdered, the team must determine whether the man's wife or mistress is lying; a homeless woman believes Anthony DiNozzo Sr. is her father.

NCIS teams up with the FBI and Homeland Security to pursue two escaped British prisoners, one of them a former spy, who have crossed international borders.

The team investigates when a Navy commander's body washes ashore along with the bodies of two drug traffickers.

A decomposed body found in a tub of acid at a naval base leads Gibbs to deduce that an impostor is serving aboard one of the nuclear submarines.

A lieutenant's mummified remains turn up nearly 10 years after he was reported missing along with $1 million from his ship's safe.

The team probes the death of a sailor found clutching an officer's sword and discovers he was obsessed with a role-playing game.

When a Navy ensign from the Office of Naval Intelligence is murdered, Special Agent Ned Dorneget (Matt Jones) from NCIS cyber operations helps investigate; Jake and Gibbs' friendship is revealed.

Agents Gibbs and DiNozzo board Air Force One to investigate what seems to be a death by natural causes.