As the team copes with the aftermath of the bombing, they are directed to find and terminate with extreme prejudice the terrorist responsible.
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.
Ducky revisits a case he worked years previously and uncovers a link to the team’s current investigation into the death of a Marine.
When the crew of a helicopter that crashed at sea washes ashore days later, the NCIS team is charged with investigating the accident.
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.
While investigating the brutal death of an officer, Gibbs discovers the chief witness suffers from post-traumatic stress disorder.
Gibbs continues helping a Marine who suffers from post-traumatic stress disorder as the team works to thwart a domestic terrorist.
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.
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.
The Christmas spirit is tempered when the NCIS team begins a murder investigation that leads them to a mysterious hoard of cash.
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.
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.
Abby encounters some troubling flashbacks to her childhood when the NCIS team takes a case involving a Marine and a deadly car crash.
Gibbs and his team apprehend a notorious cyberterrorist but soon discover that his reach extends much further than they realized.
Investigating the sudden death of a Marine, the NCIS team follows the clues to an underground fight club. Meanwhile, Vance learns some shocking news.
Kidnappers seize Ducky and Palmer while they are transporting the body of an officer who committed suicide back to NCIS headquarters.
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.
The wife of a dead Marine dog handler suspects a more sinister truth, and she asks Gibbs and his team to investigate.
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.
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.
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.
Ignoring orders from their superiors to step down, the team intensifies its search for Bodnar -- and Ziva avenges her father's death.
The Department of Defense hammer comes down over NCIS's handling of the Bodnar case, with the blow falling squarely on Gibbs.
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.
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.
Determined to locate Ziva, Tony chases leads in Israel; Gibbs and the team continue their tireless hunt for Parsa and his growing terrorist ring.
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.
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.
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.
The group partners with the Coast Guard Investigative Service to probe a suspicious explosion on an oil rig; a prankster targets team members.
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.
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.
After learning the secretary of the Navy was bugged during a confidential briefing, the NSA analyst who predicted the security breach joins the team.
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.
When a mystery illness strikes children from military families, the team investigates and helps medical researchers; Vance struggles with forgiveness.
When a stolen drone leads to an elusive terrorist, NCIS teams with the Department of Defense, including Gibbs's former girlfriend.
Hunting for a terrorist, the team finds one of his cohorts using evidence from the drone attack. Emotionally shaken, McGee deals with the aftermath.
The murder of a port authority officer reveals Parsa's possible whereabouts; Bishop discloses her past association with the elusive terrorist.
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.
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.
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.
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.
Gibbs and Special Agent Pride chase leads in New Orleans after evidence points to a copycat serial killer; Bishop sends DiNozzo a special souvenir.
After returning to the Department of Defense, McGee's girlfriend finds a break in a controversial case; DiNozzo advises McGee about his love life.
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.
The team investigates the disappearance of a photographer who was scheduled to testify at an Army court-martial hearing.
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.
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.
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.
The NCIS team must determine if Washington's latest murder was connected to a mugging or to a private meeting with the president.
Ducky returns home to London after an NCIS case reveals a connection to his estranged childhood best friend.
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.
When NCIS investigates a man overboard, they find Gibbs trapped on a ship that has been commandeered by pirates.
The NCIS team investigates the murder of the wife of a Navy commander who recently appeared on a jihadist target list.
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.
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.
Surrounded by Thanksgiving travelers at the airport, Bishop and her husband work with DiNozzo on a case involving an elevated terrorist threat.
A week before Christmas, Washington faces a citywide Internet shutdown, which leaves the NCIS team to consult with three imprisoned cyberterrorists.
While Gibbs navigates between two ex-wives relentlessly vying for his attention, the team investigates copycat crime scenes.
The NCIS team searches for a home-grown terrorist after evidence reveals his role in the capture of a social worker in Syria.
When the first openly gay serviceman who was set to receive the Congressional Medal of Honor is murdered, NCIS investigates a possible hate crime.
The NCIS team investigates the murder of a U.S. Marine who attended the same military academy as Dinozzo.
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.
A police department homicide case is transferred to NCIS when the victim's stolen identity matches one created for Gibbs two decades earlier.
With his knowledge of and contacts in the world of black-market art, Dinozzo Sr. assists the NCIS team on a murder case.
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.
NCIS connects the murder of a petty officer to a 40-year-old cold case, the bombing of a U.S. airport.
DiNozzo partners with his girlfriend, Zoe, on a case after evidence calls for a joint investigation between NCIS and ATF.
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.
The NCIS cyber operations division sends special agent Ned Dorneget to assist the team in the murder case of a Navy warfare engineer.
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.
Following a deadly bombing overseas, NCIS works with several agencies to track a global terrorist group that's recruiting teens via the Internet.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.]
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.
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.
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.
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.
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.
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.
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.
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."
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.
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.
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.
The NCIS, FBI and MI6 teams continue an international manhunt for an escaped British spy who's targeting current and former agents.
A deadly car explosion appears to be connected to an NCIS agent who disappeared during an undercover assignment in Argentina.
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.
A Marine sergeant is in critical condition following a fall, and her psychiatrist tells Gibbs to investigate the case as an attempted murder.
Gibbs, Quinn and Palmer investigate the death of a Navy lieutenant on a destroyer during a tiger cruise, when civilian guests are allowed aboard.
Quinn and Bishop are sent to Philadelphia to investigate the connection between a missing MI6 officer and a murdered naval petty officer.
After a kidnapped naval petty officer escapes her captor, NCIS begins to suspect the involvement of her missing husband in her abduction.
The NCIS team tussles with a U.S. Immigration official over a key witness in a murder investigation who is about to be deported.
The NCIS team investigates a series of escalating threats against a congresswoman who has made enemies on both sides of the political fence.
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.
A hit-and-run investigation is complicated by Palmer's attempt to keep the victim's son from jumping off a building's ledge.
Evidence from the murder of a Navy captain who was under internal investigation appears to point to the address of Ducky's deceased mother.
NCIS scrambles for leads after an operation to apprehend a businessman suspected of using terror to manipulate the stock market is compromised.
The NCIS team jumps into action to track down Gibbs after he decides to independently resurrect an old undercover investigation.
The murder of a petty officer leads to a collaboration between NCIS and "The Sherlocks," a privately funded investigative team.
An official of the Defence Logistics Agency is commanded to kill herself. Reeves and Bishop follow new leads in the Chen case.
Abby is arrested after a terror simulation in which she's participating for a homeland security think tank is compromised.
McGee finds two intruders in his apartment. Congresswoman Flemming tries to persuade Director Vance to pursue a career in politics.
To carry out a sailor's dying wish, the NCIS team reopens an investigation into a case that was originally ruled an accidental death.
The NCIS team investigates after a marine drops dead at an event for a group that arranges free tours of war memorials for veterans.
The NCIS team is forced to hunt for the creator of a ransomware virus that has taken over the agency's computers and smartphones.
The murder of a Marine appears to be linked to a former dirt bike gang that Torres had once infiltrated in order to investigate.
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.
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.
Gibbs, McGee and Torres travel to a dangerous part of Paraguay after the body parts of missing Navy SEALs turn up in the area.