Watch "NCIS: Season 15" on Netflix Taiwan

Investigating a Secret Service agent's death aboard Air Force One leads Gibbs and the team to uncover a terrorist's scheme.

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When a Marine corporal formerly known for his lucky streak parachutes violently to his death, the agents investigate the men in his unit.

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After a Navy commander's body washes ashore, NCIS must investigate a possible link to two murdered drug runners nearby.

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A sailor's drowning death points to suicide, but Kate doesn't buy it. Meanwhile, Abby uncovers a link between his ship's crew and a video game.

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The body of a Navy officer who vanished in 1994 -- along with $1.2 million -- is discovered in a cargo pod, but the money is nowhere to be found.

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Two crewmen on a ship overdose on meth but insist they don't use, so Gibbs, Tony and Kate board the carrier to unravel the mystery.

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When an ecoterrorist cell targets a submarine with an inside job, Gibbs and the team must determine which crew member is the cell's plant.

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A sailor's death from ingesting emeralds leads the agents to Guantanamo Bay, where they must thwart a terrorist's plot to kill one of his own.

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A Marine killed on a covert CIA mission apparently phones his wife, forcing NCIS to determine whether his death -- or the call -- was a hoax.

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A woman who's been buried alive emerges from a shallow grave with no memory of who she is, but certain a bomb is going to detonate on a Navy ship.

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After a CIA employee witnesses the murder of a Navy lieutenant who was testing a high-tech device, the agents try to determine why he was killed.

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When a severed leg with a Semper Fi tattoo is found, the agents try to identify who the limb belongs to, leading to a case from two years earlier.

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When a sniper kills two Marine recruiters, the agents must find the culprit before he strikes again.

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With no apparent suspects or motive, the agents struggle to determine why a serial killer is targeting the officers at a naval base.

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When his former commanding officer goes AWOL from Iraq, Gibbs must clear him of absconding with millions of dollars.

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When a gun-toting terrorist takes Ducky, Gerald and Kate hostage, Gibbs and Tony must determine the man's ties and thwart his efforts.

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A petty officer's death at a rave leads the agents into an investigation that points to possible kickbacks, a femme fatale and practical jokes.

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When a former Navy SEAL convicted of murdering his wife escapes from Leavenworth, the agents must track him down before he seeks deadly vengeance.

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When a fellow NCIS agent is murdered while investigating a cold case, the team vows to solve the mystery and catch his killer.

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The case of a missing Marine leads Gibbs, Tony and Kate to discover that a serial killer is on the loose.

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A Marine's gruesome death leads the agents to a Marine base boxing ring, an agency sting and a black market for assault weapons.

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When a Navy SEAL dies while training for a critical mission, the agents have less than 48 hours to find his killer or the operation could be stalled.

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The Hamas operative who held some of the team hostage months earlier resurfaces to kidnap Kate and shoot down the president's helicopter.

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When the wife and blind 9-year-old daughter of a Navy captain are kidnapped, Gibbs and his team face a unique challenge.

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The team is called in to investigate when the decomposed body of a woman in a wedding dress is found in a cell beneath abandoned military housing.

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

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When a woman dressed in a Navy uniform is found raped and murdered, Ducky spots a connection to an old case.

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When the NCIS team finds the remains of an undercover FBI agent on a Marine firing range, they suspect they've stumbled onto a Mafia dumping ground.

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The NCIS team is at odds with an FBI agent while trying to protect an Iraq War veteran and her family from a group of terrorists.

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Gibbs and his team must clear the name of an elderly Marine who confesses that he murdered his best friend nearly 60 years ago.

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Gibbs and his team investigate the mysterious death of a Navy commander who, after successful open heart surgery, seemingly bursts into flames.

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Gibbs and his team are called to the scene when a Marine's wife kills an intruder who tried to rape her.

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The team must work together to find Tony when he disappears during an undercover operation posing as an escaped convict.

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When the body of a missing Navy officer is dredged up from a lake, the NCIS team must determine whether the death was an accident or foul play.

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When a telemarketer overhears a murder while making a call, the NCIS team works with local homicide detectives find out who wanted the victim dead.

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As he reassembles the pieces of three bodies found stuffed in barrels months ago, Ducky is shocked when he discovers their identities.

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Gibbs gives McGee a shot at running a case when the NCIS team investigates a woman's claim that she witnessed the murder of a sailor.

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The NCIS team investigates when a Marine records his own murder on video as he falls off a cliff.

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The NCIS team investigates the bizarre death of a female petty officer who is found brutally murdered in the bed of a dance club bartender.

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The NCIS team investigates when a sailor in Washington, D.C., receives a package from Paraguay containing a pair of blue eyeballs.

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The NCIS team investigates when a petty officer who recently returned from duty is found dead backstage at a local bikini contest.

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The NCIS team investigates when a petty officer commits suicide after being institutionalized for a nervous breakdown.

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Gibbs and the team head back to school when a Marine in an ROTC program is found murdered on a college campus.

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Gibbs and the team work to clear the name of a Navy medic killed in Iraq who was suspected of committing a murder in his hometown.

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When a letter sealed with a kiss is delivered to NCIS, Tony assumes it's for him and opens it, releasing a mysterious powder into the squad room.

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NCIS pays the ultimate price when a hunt for a terrorist assassination team turns deadly for one team member.

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As the season opens, the NCIS team is struggling to deal with Kate Todd's death, and Gibbs is determined to seek out and destroy her killer.

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The man responsible for Kate's death is playing terror games with members of the NCIS team, strengthening Gibbs's resolve to find and kill him.

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A serial killer Gibbs arrested years ago turns out to have an accomplice, which is all the more alarming when Agent Cassidy goes missing.

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A dead Marine found inside a Civil War-era tomb at the Smithsonian appears to have been buried alive. Meanwhile, Ziva must prove her worth.

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When the team investigates the murder of a petty officer gunned down on the freeway, they discover someone stole the officer's identity.

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A Marine sergeant's wife who runs a live sex website suddenly vanishes, and preliminary evidence suggests that her murder was broadcast online.

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While investigating the kidnapping of a lieutenant commander who had been working on a classified project, the team looks after his young son.

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When two married assassins who were planning a hit at a Marine Corps ball die in an accident, Tony and Ziva pose as the couple to investigate further.

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When body parts are found on a Marine base and all evidence suggests that Tony is the murderer, the NCIS team frantically works to clear his name.

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When McGee shoots an undercover detective in an alley, Gibbs wonders about the detective's reason for being there in the first place.

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Soon after a supermodel dies of an overdose on a Marine base where she was filming a reality TV show, the team is perplexed by two related cases.

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During a search for illegal weapons in a naval shipyard, Tony and Ziva get ambushed and find themselves locked inside a container.

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The team looks into the abduction of a Navy officer in charge of a nuclear weapons shipment, learning she also worked to combat online pedophilia.

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When two Marine wives, both Korean-born, are found murdered, the NCIS team investigates and discovers ties to a sleeper cell and North Korea.

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When a human head is found, Abby traces it to a deceased Navy captain, only to learn that the ashes in his family's possession aren't really his.

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While the team is investigating the bizarre explosion of an ambulance carrying the body of a young Marine, Ducky makes a startling discovery.

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A Navy petty officer appears to have been eaten by a bear but is found to have had a prior stab wound. And things only get more bizarre from there.

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A high school student enters his classroom with a bomb strapped to his body and takes everyone hostage, demanding that his mother be brought to him.

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A dead Marine is found in a frozen pond, but the mystery only deepens when the bodies of three prominent South American gang members surface.

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The shooting death of a Pentagon cryptographer appears to be an at-home suicide until Abby learns that someone was with her at the time of death.

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A couple checking into a motel room find bloodstains and human tissue. Meanwhile, the detectives dig into Abby's past to find out who's stalking her.

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The NCIS team must race to locate Shepherd when a suspect in a drug bust dies in Ziva's custody and the man's brother takes Shepherd hostage.

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Gibbs is hurt in a terrorist explosion and winds up in a coma, during which he has flashbacks of his family's murder and his Desert Storm injury.

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When Gibbs wakes from a coma with memory loss, the team rushes to help him recall the details of an impending terrorist attack.

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The NCIS team must learn to work without Gibbs when Ziva is wanted by the FBI after she inadvertently witnesses a political assassination.

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When Fornell is threatened by an escaped convict, Agent Gibbs returns to the NCIS team to investigate the convict's case history.

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When a Navy lieutenant's bloody car is discovered, the team goes undercover to shed light on the missing woman's search for a perfect man.

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A routine traffic stop gets complicated when the Russian driver turns out to be connected to Homeland Security and one of Mike Franks's old cases.

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A lance corporal bound for Iraq turns up dead in a vacant house. NCIS discovers the victim was first buried, then exhumed - and he had two fiancées.

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Aside from being shocked by Abby's Halloween costume, the team investigates a ransom case involving a Marine's daughter and a nasty divorce.

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Navy and Army investigators team up to hunt clues in a suspected terrorist attack, but a CIA lead sends them to a warehouse rigged to explode.

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When a decorated Marine veteran's apparent suicide is clouded by suspicious circumstances, Gibbs makes it his mission to restore the man's honor.

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When his sister shows up on his doorstep bloodied and disoriented, McGee breaks NCIS protocol and risks his job with an independent investigation.

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The NCIS team must partner with the FBI when a suspected serial killer's body is found charred and mummified inside a Marine base furnace.

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The team inspects a robotic, self-driving vehicle named Otto, in which a Navy lieutenant is found dead. Was it suicide or sabotage?

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When the body of a high-level Marine intelligence officer turns up dead in a small town motel, NCIS must step on local toes to uncover the killer.

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Wanted terrorist Mamoun Sharif is on the loose with a highly toxic chemical weapon, and NCIS must track him down before he strikes.

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When the Navy's top secret weapon system is stolen, the team yanks Ducky out of the autopsy room, sending him undercover to thwart an arms deal.

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A young sailor's body is found in a squalid section of town and while it appears to be suicide, the team uncovers evidence pointing to murder.

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When a Navy lieutenant working for the International Atomic Energy Agency contracts radiation poisoning, NCIS suspects foul play by an insider.

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An explosion at a military cemetery opens a crypt full of dismembered bodies; Gibbs and team must inform the victims’ families and solve the crime.

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A frozen Marine regains consciousness on Ducky’s autopsy table, so the team retraces his steps, uncovering a secret Baghdad trip and a link to Gibbs.

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An NCIS tip line call turns out to be a trap, killing two agents. Feeling personally responsible, Agent Paula Cassidy steps up to help investigate.

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When a petty officer who served as a model for one of McGee's latest book characters is murdered, all eyes turn to the horrified author for clues.

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Director Shepard's informant meeting goes awry when her contact is killed, leading Gibbs to intervene in Shepard's chase after their nemesis.

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A blind photographer's unique, non-sighted senses help track a petty officer's killer; meanwhile, Gibbs and Tony deal with commitment issues.

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Turning away from a pile of bureaucratic paperwork, acting director Gibbs leaps on the case of a man found dead in a taxi bound for NCIS headquarters.

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Gibbs and his NCIS agents reluctantly reveal their most carefully guarded secrets during a round of Homeland Security polygraph tests.

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The final showdown between the NCIS team and an elusive arms dealer reaches an explosive and deadly conclusion.

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While examining the body of a hit-and-run victim, Ducky makes a shocking discovery that leads to a search for a missing child.

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Gibbs and Lt. Col. Mann unite for a joint investigation into the murder of a Marine captain who had access to highly classified information.

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While demonstrating an autopsy on an anonymous cadaver, Ducky finds evidence of murder and a connection to a criminal mastermind.

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When the team tries to talk a distraught naval officer down from a rooftop, what starts out as a suicide attempt turns into a murder investigation.

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The team is put in mortal danger while investigating a mysterious death on a naval research ship that's been abandoned in the middle of the ocean.

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When Gibbs agrees to help his deceased daughter's childhood friend, he finds himself at the center of an emotional journey into his past.

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The team's investigation into the assassination of a Navy admiral takes an unexpected turn when they meet a woman searching for her missing husband.

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During a forensics lab tour, the team learns that one of McGee's Youth Rangers was abducted and has been missing for years.

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The NCIS team pays a heavy price when they try to track down a delusional Marine who escaped from a psychiatric ward.

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When a Muslim Marine is found dead near a mosque, NCIS suspects murder, but the autopsy is delayed for religious reasons.

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When high-tech naval radar goes missing, the NCIS team stakes out a warehouse to catch a suspected thief -- but witnesses a murder instead.

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When a Navy dog handler is found mauled to death, the team needs to determine if his dog is the killer or the victim of a canine framing.

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When the dead body of arms dealer La Grenouille surfaces, the NCIS team is put under investigation for his murder by the FBI.

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When a mortar attack in Baghdad turns into a murder investigation, two members of the NCIS team are sent to Iraq to solve the case.

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Ziva's undercover assignment takes a shocking and deadly turn when the serial killer she has been tracking becomes suspicious of her.

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After coming face-to-face with an evasive killer and his gun, Palmer suffers a trauma-induced memory block and can't seem to identify the shooter.

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A former NCIS agent is found dead. Suicide is the suspected cause of death -- until Jenny finds evidence of murder.

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The team mourns the loss of one of their own, and their lives are on the line when Jenny's history with the deceased comes back with a vengeance.

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Gibbs learns of a startling relationship between a homicide case involving the killing of a petty officer and Vance's decision to break up his team.

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While investigating an apparent suicide aboard an aircraft carrier, Tony discovers a possible connection to a larger scheme.

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The team learns the hazards of Washington politics when an esteemed senator asks Gibbs to solve the murder of a female naval officer.

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Things get a little personal when the ambush of two Marines leads the NCIS team to Gibbs's hometown, where some of his skeletons are revealed.

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NCIS runs headlong into FBI interference when they look into the case of a Marine who was found tortured and murdered in his garage.

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In the days before Halloween, a rampaging serial killer posts cryptic clues online, which the NCIS team must decipher before he strikes again.

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Rookie Dwayne Wilson helps NCIS investigate a bank robbery that leaves a guard dead at Quantico, the world's most heavily secured Marine base.

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When Vance instructs Gibbs to track down the traitor in the department, the team launches an elaborate war game designed to ferret out the mole.

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To nab a crook determined to steal government secrets, the team is forced to rely on tips and information from sketchy sources.

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A petty officer is killed in a car crash, but suspicious circumstances lead the agents to question whether his death was truly an accident.

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A double homicide case leads the NCIS team to a set of fingerprints that implicate a Vietnam War veteran who's been dead for almost two decades.

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When McGee enters a women's prison to investigate the murder of a guard, the inmates riot and take over, trapping him behind bars.

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After Ducky is stabbed during an investigation, the team uncovers decades-old secrets from the doctor's past -- including allegations of war crimes.

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When a captain is murdered in gruesome fashion, the NCIS team uncovers surprising details about his private life, including a possible act of treason.

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The murder of a Marine with a questionable past -- and a cryptic clue left at the crime scene -- forces Gibbs to confront secrets of his own.

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When one of Tony's old cases is reopened and a key witness found murdered, Gibbs hands him the reins to finally solve the case.

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Gibbs gets a chance to show off his sniper skills when the murder of a fellow agent leads him to Arizona, the victim's home turf.

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When Vance deploys the squad in his own private investigation into the death of a friend, Gibbs decides to take a closer look into Vance's past.

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When an officer's son finds a gun at a playground, Gibbs and his team work to untangle a series of murders committed with the weapon.

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Gibbs and the rest of the NCIS team join forces with shifty CIA agent Trent Kort to bring down one of the most-wanted criminals on their watch list.

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A scientist working on a top-secret government project disappears, and Abby is tapped to take over in his absence -- but will she meet a similar fate?

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NCIS teams up with the Office of Special Projects in Los Angeles to investigate a murder, but the case spirals into an issue of national security.

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In Los Angeles, the joint task force closes in on a terrorist sleeper cell, but Mossad operative Rivkin interferes with an agenda of his own.

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When a security leak at a top-secret meeting leads to the murder of an ICE agent, NCIS teams up with the FBI and ICE to hunt down the killer.

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The team follows Mossad agent Rivkin back to Israel, where Ziva meets with her father -- the head of Mossad -- in an increasingly volatile situation.

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

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The team finds that the bizarre death of a Marine and his friends may be linked to their past, but it is Gibbs who ends up traveling down memory lane.

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The team must take a second look into the death of a lieutenant after the blogger who accused them of a cover-up winds up dead.

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When a Marine's body surfaces halfway around the world, the investigation forces Ziva to dig up a buried chapter of her life.

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When a Marine known for practical jokes dies on the eve of Halloween, the team finds that the victim's pranks may have roused ghoulish retribution.

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

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With the team's help, Vance faces his demons while uncovering a complex relationship with a killer that puts his whole family in danger.

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The team members literally find themselves in the dark when an investigation into the death of a lieutenant is connected to a citywide blackout.

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A dead Marine's work with 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.

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When the enlisted son of a retired colonel-turned-preacher is found dead, the team believes he may be the victim of a hate crime; Gibbs's dad visits.

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When a Navy pilot is found dead under odd circumstances, Gibbs and his team find themselves battling a no-nonsense attorney with a hidden agenda.

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Gibbs questions DiNozzo's ability to do his job when Tony's father becomes involved in the team's investigation of an assassination plot.

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When the government's star witness in an embezzlement case is targeted by an assassin, it is up to the team to help her make it home alive.

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The team finds itself in a race against time when a terrorist group threatens to detonate a dirty bomb in the Washington area.

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When a Marine veteran is found dead, Gibbs, Fornell and the team hit the open road to bust an illegal trucking operation.

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Secrets are exposed when Gibbs's former mother-in-law surfaces as a witness in an investigation of her Navy captain fiancé's murder.

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The team investigates the shooting of a Marine who had gone MIA and uncovers that he led another life that no one could have imagined.

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The team members notice similarities between themselves and their Coast Guard counterparts when a Navy diver seeking sunken treasure is found dead.

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The death of a Navy officer leads Gibbs and the team into the world of high-priced call girls, relying on a D.C. madam to help them catch a killer.

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The bodies of a petty officer and a mobster wash up on the beach, leading the team to a polygraph specialist who may covering up the truth.

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DiNozzo finds himself increasingly captivated by a woman he has never met while he investigates the murder of her brother.

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

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When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime; the team learns of the rape of a sailor.

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In Mexico, Gibbs faces his demons and meets the head of a drug cartel, bringing him to a startling decision; a prisoner dies on Tony and Ziva's watch.

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With drug cartel leader Paloma Reynosa on the loose and intent on fulfilling her vendetta, Gibbs takes desperate measures to protect his loved ones.

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A young girl's kidnapping turns into much more when her grandfather complicates the investigation by working outside the law.

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When the motives behind an attack on a female bomb tech link her to a murder, the team investigates her closely guarded personal life.

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When the body of an American officer is connected to a British Navy vessel, murder turns into a volatile international incident.

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When a controversial DJ and a Navy commander are shot to death on a live talk show, the team uncovers a sinister plan that involves a bomb.

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Delving into the mind of a brilliant Navy scientist, Abby becomes fixated on solving her murder; DiNozzo's fling leads to an interesting Halloween.

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DiNozzo's father returns, playing a vital role in a murder investigation that could have catastrophic results.

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The team is assigned to protect Ziva's father when his attendance at a high-level conference leads to an unexpected turn of events.

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The team scrambles for answers after a shocking ambush leaves Vance seriously injured and reveals a new twist to their current investigation.

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The NCIS team investigates the disappearance of a Navy petty officer who is the sole witness in an upcoming murder trial.

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Gibbs and the team partner with a Coast Guard Investigative Service agent to solve the murder of a Marine gunned down on a dinner boat.

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A Navy recruiter's session at a college fair comes to a fatal end, prompting the team, along with Dr. Mallard's forerunner, to solve his murder.

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The team springs into action to find the person responsible for beating a Marine sergeant to death in his own backyard.

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The team members undergo mandatory psych evaluations while investigating the death of a commanding officer who was shot in his stateroom.

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A botched assassination attempt forces the team to protect a foreign official's daughter who is studying in the U.S. and is smitten with McGee.

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The dismembered fingertips and teeth of a murdered Marine are found in a pickpocket's stolen purse, launching a mission to find a coldblooded killer.

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As a new agent joins the office, the team learns that a former employee found dead was selling details on how to rob a warehouse full of valuables.

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

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The team connects a message written in blood, left by a murdered Navy commander, to a manuscript that may contain classified military information.

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

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The NCIS team tracks a Navy lieutenant's killer after a Pentagon security camera reveals a petty officer committing the crime.

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When his ex-partner seems to be the victim of the Port-to-Port Killer, Tony revisits his days as a detective in Baltimore, where he first met Gibbs.

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

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The lives of the team are in jeopardy when they follow a trail of violence and come face-to-face with the infamous Port-to-Port Killer.

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After spending months tracking down his target, Tony is left with the blood of an NCIS agent on his hands, and it's up to Gibbs to help him.

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The NCIS team uncovers a startling surprise after a young Marine shows up to his homecoming party with a fatal stab wound.

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The line between McGee's personal and professional life is blurred when NCIS uncovers a connection between his grandmother and a lieutenant's murder.

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The team searches for the person and motive behind a contract killer targeting a Navy lieutenant commander. Abby uncovers new info about her family.

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When a Coast Guard officer is gunned down on a cargo vessel, the NCIS team searches for the killer but finds something else.

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An NCIS case changes from accidental death to murder when evidence reveals that a Navy lieutenant died of forced over-hydration.

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

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

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

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

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

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The investigation into the murder of a Navy commander leads the NCIS team to E.J. Barrett's whereabouts and a new probe into Agent Stratton.

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When a Navy lieutenant is found dead in a building under construction, NCIS searches for a killer while dealing with her distraught detective husband.

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During a routine stop for his morning coffee, Gibbs finds himself staring down the barrel of a gun, forcing him to question choices he has made.

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When a Navy captain is found dead wearing an unusual costume, NCIS uncovers a secret society of real-life superheroes and must track down the villain.

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When a Navy psychologist is found dead, Gibbs goes face-to-face with Dr. Samantha Ryan of Psy Ops to uncover the truth behind the suspected suicide.

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Top-secret clearance from a research laboratory is jeopardized when the murder of a chief petty officer is connected to an international arms dealer.

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

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Director Vance's brother-in-law is the lead suspect when Gibbs and the NCIS team investigate the murder of a petty officer.

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Following the murder of a Marine, Tony and Ziva join Ziva's mentor in Colombia in a search for a missing Marine lieutenant and Navy chaplain.

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After a warehouse fire reveals missing Navy documents, posing a potential threat to national security, NCIS joins the Baltimore P.D. investigation.

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The NCIS investigation of a fire on a Navy vessel leads to elevated security at all U.S. Navy facilities worldwide. DiNozzo and Ziva travel to Italy.

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NCIS 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.

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Terrorism threatens to shake the foundations of the Navy and NCIS, as the team struggles to capture the newest member of the NCIS Most Wanted Wall.

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As the team copes with the aftermath of the bombing, they are directed to find and terminate with extreme prejudice the terrorist responsible.

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The body of an NCIS employee turns up four months after a bombing, and each member of the team is required to undergo psychological evaluation.

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Ducky revisits a case he worked years previously and uncovers a link to the team’s current investigation into the death of a Marine.

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When the crew of a helicopter that crashed at sea washes ashore days later, the NCIS team is charged with investigating the accident.

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While looking into the murder of a Navy officer, the team uncovers a link to a Medal of Honor recipient who was also a close friend of Gibbs’s father.

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While investigating the brutal death of an officer, Gibbs discovers the chief witness suffers from post-traumatic stress disorder.

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Gibbs continues helping a Marine who suffers from post-traumatic stress disorder as the team works to thwart a domestic terrorist.

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Gibbs appeals to a former contact for help locating a kidnapped girl, while Abby and Ziva work with the girl’s young friend who witnessed the crime.

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Gibbs and FBI Agent T.C. Fornell hunt for a shooter who tried to take out Fornell -- but their mutual ex-wife, Diane Sterling, gets involved.

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The Christmas spirit is tempered when the NCIS team begins a murder investigation that leads them to a mysterious hoard of cash.

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As the team works to solve a murder involving a petty officer and a journalist, Ziva's father -- the director of Mossad -- pays her a surprise visit.

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Ziva buries her father as the team hunts down the hit man -- and the person who hired him -- responsible for the shootings at Vance's home.

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Abby encounters some troubling flashbacks to her childhood when the NCIS team takes a case involving a Marine and a deadly car crash.

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Gibbs and his team apprehend a notorious cyberterrorist but soon discover that his reach extends much further than they realized.

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Investigating the sudden death of a Marine, the NCIS team follows the clues to an underground fight club. Meanwhile, Vance learns some shocking news.

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Kidnappers seize Ducky and Palmer while they are transporting the body of an officer who committed suicide back to NCIS headquarters.

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Gibbs's barber suspects his own son may be involved in a murder, and the NCIS team suspects a Marine may have stolen a small fortune from the Navy.

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The wife of a dead Marine dog handler suspects a more sinister truth, and she asks Gibbs and his team to investigate.

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After a medical officer is murdered aboard a Navy vessel during a storm, the team uncovers a host of suspects -- including McGee's estranged father.

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The team looks into the plight of a Navy reservist whose husband has disappeared, and Tony worries that Ziva is planning to avenge her father's death.

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NCIS gets involved when a Massad officer causes trouble in Virginia, and Tony and Ziva head to Berlin to track the killer of Ziva's father.

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Ignoring orders from their superiors to step down, the team intensifies its search for Bodnar -- and Ziva avenges her father's death.

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The Department of Defense hammer comes down over NCIS's handling of the Bodnar case, with the blow falling squarely on Gibbs.

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While the rest of the team investigates the death of a SEAL, Gibbs faces intensifying scrutiny from the Department of Defense over the Bodnar case.

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An explosion that causes a casualty linked to the agency changes Parsons's outlook on Gibbs and the team. DiNozzo and McGee investigate as civilians.

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Determined to locate Ziva, Tony chases leads in Israel; Gibbs and the team continue their tireless hunt for Parsa and his growing terrorist ring.

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The team must rely on Twitter for a case involving a missing Navy lieutenant; McGee misplaces his badge but doesn't tell Gibbs and the authorities.

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Gibbs and McGee travel to Afghanistan when a murder case leads them to an Afghan women’s shelter Mike Franks has secretly supported for years.

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DiNozzo revisits his Baltimore Police Department days when he spots a felony suspect from an old case at the crime scene of a murdered petty officer.

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The group partners with the Coast Guard Investigative Service to probe a suspicious explosion on an oil rig; a prankster targets team members.

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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 investigation.

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When an FBI agent-turned-lawyer confides in Gibbs, the team must re-examine a hit-and-run murder case; McGee grows suspicious of Tony’s odd behavior.

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After learning the secretary of the Navy was bugged during a confidential briefing, the NSA analyst who predicted the security breach joins the team.

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The team discovers a link between a murder victim and the boyfriend of Diane Sterling, Gibbs and Fornell's ex-wife; a new analyst adjusts to NCIS.

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When a mystery illness strikes children from military families, the team investigates and helps medical researchers; Vance struggles with forgiveness.

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When a stolen drone leads to an elusive terrorist, NCIS teams with the Department of Defense, including Gibbs's former girlfriend.

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Hunting for a terrorist, the team finds one of his cohorts using evidence from the drone attack. Emotionally shaken, McGee deals with the aftermath.

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The murder of a port authority officer reveals Parsa's possible whereabouts; Bishop discloses her past association with the elusive terrorist.

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After finding faulty bulletproof vests in a cache of stolen USMC gear, the team tries to locate the source and any vests already shipped to soldiers.

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When DiNozzo is investigated in the death of a man impersonating an officer, the one eyewitness is DiNozzo's dad, who is in town to disclose a secret.

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When a bomb blows before a military charity concert, the team must determine if the target was a washed-up rocker or if a larger scheme was in play.

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When the body of a New Orleans politician and ex-NCIS agent washes ashore, the two field offices unite to uncover the motive and reveal the killer.

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Gibbs and Special Agent Pride chase leads in New Orleans after evidence points to a copycat serial killer; Bishop sends DiNozzo a special souvenir.

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After returning to the Department of Defense, McGee's girlfriend finds a break in a controversial case; DiNozzo advises McGee about his love life.

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The team must ascertain if an officer's murder was the result of a bar fight or because he knew too much; DiNozzo and McGee start a juice cleanse.

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The team investigates the disappearance of a photographer who was scheduled to testify at an Army court-martial hearing.

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DiNozzo is given an assignment to bring an admiral's daughter home from France, but he turns to the team when he enters a controversial crime scene.

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NCIS investigates a fire on a ship that served as a secret detention site for terrorists; Gibbs returns to his childhood home after his father dies.

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When Gibbs and McGee's mission overseas is compromised, the NCIS team races to locate them before a Russian mercenary group can do the same.

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The NCIS team must determine if Washington's latest murder was connected to a mugging or to a private meeting with the president.

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Ducky returns home to London after an NCIS case reveals a connection to his estranged childhood best friend.

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After a gifted naval research scientist is murdered, the NCIS team is assigned to a joint terrorism task force by the secretary of the Navy.

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When NCIS investigates a man overboard, they find Gibbs trapped on a ship that has been commandeered by pirates.

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The NCIS team investigates the murder of the wife of a Navy commander who recently appeared on a jihadist target list.

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Gibbs takes a case to heart when the NCIS team exposes a fraudulent charity that preys on the families and friends of missing military personnel.

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Gibbs tries to help a corpsman who was arrested after providing unlicensed, yet necessary, medical care at the scene of a hit-and-run accident.

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Surrounded by Thanksgiving travelers at the airport, Bishop and her husband work with DiNozzo on a case involving an elevated terrorist threat.

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A week before Christmas, Washington faces a citywide Internet shutdown, which leaves the NCIS team to consult with three imprisoned cyberterrorists.

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While Gibbs navigates between two ex-wives relentlessly vying for his attention, the team investigates copycat crime scenes.

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The NCIS team searches for a home-grown terrorist after evidence reveals his role in the capture of a social worker in Syria.

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When the first openly gay serviceman who was set to receive the Congressional Medal of Honor is murdered, NCIS investigates a possible hate crime.

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The NCIS team investigates the murder of a U.S. Marine who attended the same military academy as Dinozzo.

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The lead suspect in the team's current case is Gibbs's archnemesis, but he leaves the investigation to his team in order to help a grieving Fornell.

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A police department homicide case is transferred to NCIS when the victim's stolen identity matches one created for Gibbs two decades earlier.

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With his knowledge of and contacts in the world of black-market art, Dinozzo Sr. assists the NCIS team on a murder case.

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McGee and the NCIS team partner with Delilah and the Department of Defense when a murder case includes a clue to a terror group in Dubai.

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NCIS connects the murder of a petty officer to a 40-year-old cold case, the bombing of a U.S. airport.

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DiNozzo partners with his girlfriend, Zoe, on a case after evidence calls for a joint investigation between NCIS and ATF.

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After a U.S. Marine is killed, the NCIS team links the case to a terror group in Afghanistan, prompting Gibbs and Bishop to travel overseas.

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The NCIS cyber operations division sends special agent Ned Dorneget to assist the team in the murder case of a Navy warfare engineer.

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The NCIS cyber case continues after the team uncovers a group that's recruiting children to carry out acts of terrorism on a global scale.

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Following a deadly bombing overseas, NCIS works with several agencies to track a global terrorist group that's recruiting teens via the Internet.

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With Gibbs recovering on a naval ship, Tony and CIA officer Joanna Teague join forces in Shanghai to take down The Calling before war breaks out.

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Gibbs returns to NCIS with a new look that intrigues the team. His first case back partners him with a DEA agent with whom he has some shared history.

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A Quantico Marine is murdered after contacting Gibbs about a case. McGee and Bishop go undercover as a couple to keep tabs on a suspect and his wife.

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Director Vance goes back into the field with Gibbs to investigate a murder that leads back to one of Vance's old cases involving an NCIS officer.

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While visiting a pharmaceutical company's lab to consult on a murder case, Abby is trapped inside when armed men break in and take employees hostage.

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While McGee and Delilah take the next step in their relationship, the team investigates a series of murders that may be the work of a copycat killer.

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The team helps Ducky's cold case club investigate whether the son of a recently murdered ex-naval officer was wrongly convicted of murder years ago.

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Tony and McGee search South Sudan for volunteer doctors who've gone missing, including the husband of Tony's ex-girlfriend. Gibbs has a setback.

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When a petty officer accused of murdering his ex is freed in a mistrial, he begs NCIS to find the real killer. Bishop discovers something unsettling.

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At Thanksgiving, Bishop goes home to Oklahoma while the team work on holiday plans and try to solve a case involving forgery, murder and leukemia.

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Following an attack, Ducky relates the story of his decades-old search for his half-brother. Back at NCIS, Bishop makes a decision about her marriage.

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Gibbs works with New Orleans's local NCIS unit to find Abby's missing brother. [Story concludes on "NCIS: New Orleans,” Season 2, Episode 12.]

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During freezing weather, a seaman set to testify against a human trafficking ring is murdered, forcing NCIS to race the clock to find other victims.

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When a man suddenly dies after attacking three co-workers inside a pressurized chamber, NCIS must solve the case -- but only from outside the chamber.

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After the Secretary of the Navy's daughter is kidnapped for ransom, she brings in Gibbs and the team, who discover the case is more than it appears.

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Gibbs lets Dr. Taft join him after a suspect in a munitions robbery dies on his operating table. Ducky's autopsy links the suspect to an old NCIS foe.

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A case that's too open and shut nags at everyone on the team, leading each of them to ruin their evening by revisiting different aspects of the crime.

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Gibbs bonds with a Marine who's the only survivor of an Iraq sniper attack. Forensic evidence leads Abby to the sniper's real mission closer to home.

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The wife and mistress of a Navy public affairs officer each claims to have witnessed the other murdering the man. Tony's dad has a strange encounter.

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Tony stumbles upon the case of his own stolen identity when he's handed an envelope of cash by a senator, who's being blackmailed by "Tony DiNozzo."

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Gibbs and Fornell help former NCIS director Morrow find an ex-intelligence officer who escaped a British prison and was smuggled back into the U.S.

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Gibbs and Fornell look for an assassin. After the teenage son of a deployed Marine shoots and wounds an intruder, Gibbs learns the boy was the target.

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With Fornell in crisis, Gibbs, Monroe and MI-6 agent Reeves focus on Jacob's story. Abby finds a link to Kort. Gibbs' hunch may lead back to Ziva.

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The NCIS, FBI and MI6 teams continue an international manhunt for an escaped British spy who's targeting current and former agents.

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A deadly car explosion appears to be connected to an NCIS agent who disappeared during an undercover assignment in Argentina.

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A brawl at a high school reunion culminates in the accidental death of one of the fighters, and the discovery of bombs in his locker.

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A Marine sergeant is in critical condition following a fall, and her psychiatrist tells Gibbs to investigate the case as an attempted murder.

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Gibbs, Quinn and Palmer investigate the death of a Navy lieutenant on a destroyer during a tiger cruise, when civilian guests are allowed aboard.

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Quinn and Bishop are sent to Philadelphia to investigate the connection between a missing MI6 officer and a murdered naval petty officer.

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After a kidnapped naval petty officer escapes her captor, NCIS begins to suspect the involvement of her missing husband in her abduction.

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The NCIS team tussles with a U.S. Immigration official over a key witness in a murder investigation who is about to be deported.

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The NCIS team investigates a series of escalating threats against a congresswoman who has made enemies on both sides of the political fence.

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Bishop is sent to Gitmo to investigate the death of a Muslim naval chaplain who had once been involved with the detention camp's inmates.

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A hit-and-run investigation is complicated by Palmer's attempt to keep the victim's son from jumping off a building's ledge.

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Evidence from the murder of a Navy captain who was under internal investigation appears to point to the address of Ducky's deceased mother.

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NCIS scrambles for leads after an operation to apprehend a businessman suspected of using terror to manipulate the stock market is compromised.

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The NCIS team jumps into action to track down Gibbs after he decides to independently resurrect an old undercover investigation.

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The murder of a petty officer leads to a collaboration between NCIS and "The Sherlocks," a privately funded investigative team.

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An official of the Defence Logistics Agency is commanded to kill herself. Reeves and Bishop follow new leads in the Chen case.

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Abby is arrested after a terror simulation in which she's participating for a homeland security think tank is compromised.

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McGee finds two intruders in his apartment. Congresswoman Flemming tries to persuade Director Vance to pursue a career in politics.

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To carry out a sailor's dying wish, the NCIS team reopens an investigation into a case that was originally ruled an accidental death.

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The NCIS team investigates after a marine drops dead at an event for a group that arranges free tours of war memorials for veterans.

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The NCIS team is forced to hunt for the creator of a ransomware virus that has taken over the agency's computers and smartphones.

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The murder of a Marine appears to be linked to a former dirt bike gang that Torres had once infiltrated in order to investigate.

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The murder of a Marine sergeant in a national park appears to be only one of a series of related crimes in the same area.

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The NCIS team travels out to sea after a young petty officer aboard a destroyer is found dead. McGee's fiancée, Delilah, is rushed to the hospital.

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Gibbs, McGee and Torres travel to a dangerous part of Paraguay after the body parts of missing Navy SEALs turn up in the area.

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