After the terrorist's attack, the NCIS team is shocked and is trying to cope with Kate's sudden death, each in their own way. Now, their mission is to collect all the possible info on Ari and find a way to stop him before he does any more damage. Meanwhile, while feeling guilty over Kate's death, Gibbs is informed that the NCIS director is leaving, and the replacement is Jenny Shepard, a woman Gibbs worked with in the past and had a romantic history with.

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

Gibbs is ordered to talk to a convict that is about to be executed, in order to discover information about the place where he hid his victims, but when the plan doesn't work, the team must solve the case in their own way.

When a corpse of a man is found inside a tomb that comes from the Civil War, the team discovers that the victim, a Sergeant, was buried alive. During the investigation, Abby tracks down the last phone call of the victim. Meanwhile, Gibbs is informed by his new boss Jenny Sheppard that agent Ziva is now a full-time NCIS agent.

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

The NCIS team takes upon a strange case - a Marine's wife was murdered live on the Internet. The investigation reveals that two housewives were running a live Internet sex site and now they are both missing. While looking for them, the team will try to track down the webmaster and solve the alleged murder case.

When a 6-year-old boy informs the NCIS team that his father was kidnapped, the team discovers that the missing father is actually a Lt. Commander working on a secret project named Honor, and that he is the only one who has the code that can open the project. While Gibbs gets closer with the boy, the rest of the team discovers that the project has been hacked in and the information inside has been deleted. Is the missing man innocent or is he actually the guilty one?

When bodies of two hired assassins are delivered to the NCIS team, Ziva & Tony go undercover assuming the victim's identities in order to find the person who hired the assassins for their mission. While working on the case, Ziva & Tony spend some quality time in a luxury hotel and the attraction between them arises. Gibbs discovers that his team is not the only one working on the case.

Tony is accused of murdering a woman whos body was found at Quantico and the team must prove his innocence. All the possible evidence prove that Tony is guilty and the team will give their best to set their agent and a friend free.

While on duty, McGee kills a man who is later discovered to be an undercover police officer. When Jenny decides to approve the investigation on McGee, the NCIS team is forced to prove that McGee is not guilty, pushing Gibbs' relationship with Jen to the limit. Meanwhile, Tony is troubled by his past.

While filming a reality show on a Marine base, a supermodel dies and the NCIS team must discover who is the model's murderer. They discover a love triangle between the model and three other men, all suspects. Meanwhile, Jenny is disturbed by Gibbs when he doesn't want to attend an award ceremony in his honor.

While on investigation at a shipyard, looking for smuggled weapons, Tony and Ziva dissapear and it's up to NCIS to find them. Abby tries to track them down by tracking down their GPS chips, but they seem to be out of reach. Meanwhile, Tony and Ziva, hiding in a container, find evidence which could help them solve the case.

When a Commander in charge of a shipment of fuel rods for nuclear power stations disappears, the NCIS team is called in. The team must solve the case in time, before the person who kidnapped the Commander finds out the secret location of the fuel rods or harms the Lt. Commander.

The NCIS team investigates the murder of two Marine wives, and must find the murderers before they attack their next target, another woman.

While discovering an illegal automotive chop shop, the NCIS team stumbles upon a severed head of a Marine, hidden in one of the cars from the shop. When they find possible suspects, the team will have to find the rest of the body and find the murderer.

When an ambulance explodes while carrying the remains of a Marine's body that was killed in a car crash, the NCIS team is called in to investigate what actually happened. The investigation leads them to some sudden discoveries -- the DNA of the victim found in the ambulance doesn't match the Marine's DNA; the ambulance was set up to explode; and the family of the dead Marine is hiding a very important secret.

When Marine dog tags are found in a national forest by a group of teens, the NCIS team is called in to investigate. While searching for the campsite of the Marine, the team finds out that there was another person, possibly a woman, with him. The investigation takes them to an even more higher discovery -- there could be a serial killer killing women in the national forest.

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

Gibbs and the team are called in when a couple of kids stumble upon the body of a missing Marine in a frozen lake. As the NCIS team searches the frozen lake bed for clues, they come across three more bullet-ridden bodies. During the autopsies, Ducky and Gibbs discover that the three additional victims had gang tattoos. With this crucial piece of information, the team works to uncover the Marine's connection with a deadly street gang.

When a Pentagon cryptographer is found dead, the NCIS team has to discover whether the person was or wasn't a Pentagon mole, and if the person committed suicide. As the investigation continues, the team discovers that the person wasn't alone when she died, so someone must have murdered her. So, the team has to find the person, a mole, who murdered the cryptographer.

While working on just a regular murder case with the rest of the NCIS team, Abby is almost killed by an evidence from the case and soon it becomes clear that the murder was staged, and that someone wants Abby dead. The team discovers some enemies from Abby's past, and they must find out who is the person, before the person kills Abby.

The NCIS team must protect Ziva when a suspect dies while being in custody, and her tactic might be the reason why the person died. The things become much more dangerous when the suspect's brother kidnapps Jenny, and demands the release of his brother in exchange for Jenny, but he has no idea that his brother is dead.

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

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

When Ziva accidentally witnesses a political assassination, she must surrender to the FBI and deal with the consenquences without Gibbs's help, who is now enjoying his retirement. She learns that the FBI is looking for her and escapes, while the NCIS team, leaded by Tony, must prove that Ziva is innocent. However, when things get more complicated, Ziva seeks help from the one person that always trusted her, Gibbs.

Gibbs is forced to come back out of his retirement to help Fornell, who is being threatened by a convict that escaped from prison. The convict threatens both Fornell and his daughter Emily. Gibbs and the NCIS team re-open the convict's old robbery case, and question a retired sailor who is the only one who contacted the convict after he was sent to prison. The investigation will lead the NCIS team to a surprising discovery.

An abandoned car is found full of blood, registered to a missing Navy lieutenant. The NCIS team learns that the missing lieutenant was profiling men, trying to find a perfect man for herself. When they find out that the woman intended to go to a seminar at a local hotel, Ziva goes undercover to find more information. Ducky is busy going through the profiles of the men. Jenny makes a secret offer to Tony.

After police pull over a driver and arrest him for a concealed weapon, a car crashes into their patrol car with a dead man behind the wheel. The arrested man turns out to be Russian and Homeland Security claim he was working for them. The Russian is linked to an old case that Mike Franks worked on. Mike comes out of retirement to put the Russian behind bars.

When a missing Lance Corporal is found dead in a vacant house, the NCIS team discovers that he was buried in the backyard and then exhumed. They learn about his identity and that he was to be deployed to Iraq, but he never showed up for duty. The investigation leads them to a new clue---he had two fiancées. Abby runs the DNA samples from the two women to find out if the DNA is a match to the soil found on the dead man's body.

It's Halloween and the NCIS team is busy investigating a ransom case. A Marine's daughter has been kidnapped after the kidnapper attacked a Marine in his home. The investigation leads them to a fact that the couple has been separated. They decide to focus on the wife's ex-boyfriend, after learning that the woman is the one who destroyed their marriage. Meanwhile, McGee and Tony are stunned by Abby's Halloween costume.

When a Marine Colonel dies in an explosion at a military golf course, the NCIS team must investigate a suspected terrorist attack with the help from the Army Criminal Investigative Division (CID). The CIA gives them a lead to an abandoned warehouse, but it turns out to be a trap---the warehouse is set to explode. McGee uses his computer skills to break into the secret government files to uncover the terrorist cell.

When an honored Marine veteran is found dead in a hotel, the NCIS team must find out what happened to him. Soon they realize that the Marine didn't commit suicide and that he was a homeless man. After going through his stuff, they find compromising evidence against him, and Gibbs is determined to prove the man's innocence.

McGee breaks the rules, risking his NCIS job, to help his sister Sara, who shows up disoriented and bloodied. While he works on figuring out what happened to his sister, the NCIS team is investigating a case of a Navy sailor, who is somehow connected to McGee's sister. Both Tony and Abby are busy with love problems, while McGee turns out to have another secret.

When a burnt and mummified body of a missing and wanted person is found on a Marine base, in a furnace, NCIS must work with FBI. The burnt man turns out to be a serial killer. The both teams visit the man's family and discover something shocking. Also, the NCIS team must deal with the book McGee wrote about them, using "fictional" characters.

When a robotic vehicle named "Otto," a part of a high level project of the Department of Defense, causes a death of a Navy Lieutenant, and then later almost kills Abby, the NCIS team must find out who sabotaged the vehicle and murdered the Navy Lieutenant. Meanwhile, Ziva realizes that Tony keeps on visiting the hospital. What is he doing there?

When a high-level Marine intelligence officer is found murdered in a small motel room, the NCIS team must find the person who murdered him. After discovering that the person was dead for already three days, and that the town authorities already "investigated" the crime, Gibbs is determined to solve the case, which could be related to a terrorist cell, and not let the town authorities get in his way.

When the NCIS team learns that the missing 10 kilograms of highly toxic chemical weapons are now in the hands of Mamoun Sharif, a wanted terrorist, they will have to find a way to find the man and stop him before it's too late with the aid from Army Lt. Col. Hollis Mann and constant phone calls from Sharif himself.

After catching an international arms dealer, the NCIS team learns that Navy's highly classified weapons system will be sold to "La Grenouille," an important arms dealer. To stop the transaction, the team will send Ducky undercover. Meanwhile, another government agency appears to be working on the same case, with different plans.

When a dead body of a sailor is found in an abandoned part of the town, all the evidence seem to point that the person died from unintentional drug overdose, but when the team uncovers more evidence, it turns out to be a murder. Meanwhile, Tony bonds with a local detective while working on the case.

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

When an explosion at a military cemetery mausoleum reveals a crypt full of a mixture of body parts, the NCIS team must inform the families of the victims, hoping to find a connection between the dismembered victims, and narrow down the suspects to find out who is behind the hideous crime. Meanwhile, Abby is dealing with a personal problem, and the only person she can talk to about it is Gibbs.

When a supposedly frozen to death Marine turns out alive on Ducky's autopsy table, the NCIS team has to find out about the victim's movements last few days to uncover what happened to him and who left him for dead. As the investigation progresses, the team learns about the victim's trip to Baghdad via a private cargo plane and discovers a link to Gibbs' past.

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

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

Director Shepard makes a huge mistake by meeting a man alone to inform her about Le Grenouille, as their meeting turns into a murder of the informant. Now the NCIS team must gather all the existing info and try to finally hunt down their enemy.

When a blind photographer shoots the body of a Petty Officer on film, the NCIS team uses his special insight to investigate the crime. Meanwhile, both Gibbs and Tony are having commitment issues in their relationships.

When Jenny has to attend an overseas conference, Gibbs is made acting director, but he prefers to ignore his duties and lead the investigation of the murder of a man, who was found dead in a taxi headed to the NCIS headquarters.

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

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

During an autopsy, Ducky makes a startling discovery that turns a murder of a Petty Officer into a search for a missing infant. Meanwhile, Tony has to deal with his feelings for Jeanne.

Lt. Colonel Mann joins Gibbs in an investigation of the murder of a Marine Captain who had access to highly classified information. Things get very personal for Gibbs when one of the witnesses in the case turns out to be one of his ex-wifes.

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

The NCIS team is called in to stop a naval officer from committing suicide by jumping off a rooftop, but when the suicide attempt turns into a murder, the NCIS team will have to find out who did it.

While investigating a mysterious death on a top-secret naval research ship at sea, the NCIS team comes upon an abandoned ship which contains a deadly secret that may cost them their lives.

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

A murder investigation of a Navy Admiral takes a shocking turn when a woman, a political refugee, returns home to search for her husband.

The NCIS team has to babysit a 9-year-old son of a missing man, a survivalist who is somehow connected to a cold case murder. The investigation leads the team into the wilderness, where they discover a shocking truth about the man's past.

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

After a young Muslim Marine is murdered near his Mosque, Ducky refuses to perform autopsy due to his religious beliefs, so the NCIS team tries to talk to the father of the deceased, and they send McGee to plant a bug in the Mosque, only to discover that the FBI already planted their bug.

The NCIS team goes on a stakeout in a warehouse to catch a suspected thief of a high-tech naval radar, but they accidentally end up witnessing a murder. Meanwhile, Ducky hides a secret from the rest of the team.

When a dog owner is found murdered, the NCIS team must determine if his dog committed the murder or not, and Abby decides to fight for the dog's life by trusting her instinct about the dog's innocence. Meanwhile, Gibbs learns about Jenny's secret.

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

Two members of the NCIS team are sent to Baghdad to investigate a Mortar attack that turned into a murder investigation.

While on an undercover mission, Ziva's life is put in grave danger when the serial killer she's been tracking becomes suspicious of her.

Palmer is put in grave danger when he becomes the target of an anonymous murderer, whom only he can recognize.

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

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

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

DiNozzo's investigation into a Navy Lieutenant's apparent suicide takes a surprising and deadly turn when its seems that it might have a connection to a larger, deadly scheme.

A distinguished senator asks Gibbs for help in solving the murder of a young female Naval officer.

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

Gibbs' hunt for the killer of a marine puts him on a collision course with an old friend.

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

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

A strange delivery in a box arrived at the Navy facilities: The delivery driver and a Navy MP officer discover it is a sailor's corpse.

A shocking revelation comes to light after the team is forced into playing a dangerous war game.

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

The team investigates the death of a petty officer and discovers he may have been leading a violent secret life.

During the week of Christmas, The Team is Forced to work overtime when they discover their prime suspect had been dead for 17 years.

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

Secrets from Ducky's clandestine past come to the forefront after he's attacked at a crime scene. The team uncovers disturbing secrets from the good doctor's past.

The team discovers a link between a sergeant's murder and his possibly treasonous private life.

Demons of the past come back to haunt Gibbs when he finds a cryptic message waiting for him at a crime scene.

A murder prompts the reopening of one of Tony's old investigations, leading Gibbs and DiNozzo to reverse roles to solve the case.

When a fellow agent is murdered, the NCIS teams heads into the desert to locate a woman who might hold the answer to the mystery murder.

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

When a young boy finds a murder weapon, the team must trace ownership of the gun to find who used it last and who was murdered.

Gibbs and the team must work with the shady Trent Kort to put away one of NCIS's most wanted.

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

The body of a Marine leads Gibbs and McGee to the NCIS OSP division in Los Angeles, where a murder investigation quickly climbs to a matter of national security in which the two offices must work together to resolve. Meanwhile, Tony begins to snoop into Ziva's personal life.

With the appearance of Mossad agent Michael Rivkin, Tony is forced to question Ziva’s loyalty to NCIS. Meanwhile, in Los Angeles, Special Agent Callen goes undercover to try to catch a terrorist cell while OSP psychologist Nate Getz discovers the startling truth about Gibbs and Special Agent Lara Macy’s relationship.

After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer. Meanwhile, Tony finally comes face-to-face with Michael Rivkin.

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

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

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

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

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

When a Marine known for his practical jokes is found dead on Halloween Eve, the NCIS team discovers that the victim's "good-natured" pranks may have inspired ghoulish retribution. Meanwhile, Ziva tries to adjust to her new role on the team.

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

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

The team literally finds themselves in the dark when the investigation into the death of a lieutenant is connected to a city-wide blackout.

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

The body of the son of a retired Colonel-turned-preacher is found and the team have their suspicions that he may be the victim of a hate crime. Meanwhile, Gibbs gets a holiday visit from his father.

When a Navy pilot is found dead under strange circumstances in a secluded area, the team finds themselves battling a no-nonsense attorney with a hidden agenda.

Gibbs is worried about Tony's ability to handle his job when Tony's father turns out to be linked to their newest investigation, an assassination attempt on a foreign prince.

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

The team finds themselves in a race against time when a terrorist group threatens to detonate a "dirty bomb" in the D.C. area.

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

Secrets arise when Gibbs former mother-in-law surfaces as a witness in a murder investigation.

Gibbs and the team investigate the shooting of a Marine and uncovers more to his life than anyone would have ever imagined.

The team discovers striking similarities between themselves and their CGIS (Coast Guard Investigative Services) counterparts when a Navy diver seeking sunken treasure is found dead.

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

When an NCIS polygraph specialist's night job takes a dangerous turn, Gibbs, Fornell and the team have to uncover the truth.

DiNozzo finds himself increasingly captivated by a woman he's never met while investigating the murder of her brother.

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

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

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

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

The NCIS team has to find a young girl that was kidnapped, but their investigation turns into something else when her grandfather gets way too involved.

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

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

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

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

The team is surprised when Gibbs asks Tony's father to join them in a murder investigation.

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

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

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

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

A petty officer's recruitment session at a college fair comes to a fatal end, prompting the NCIS team, accompanied by Dr. Mallard's predecessor, to solve his murder.

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

The NCIS team undergoes mandatory psych evaluations while investigating the death of a naval commander.

A botched assassination attempt in Belgravia forces NCIS to protect the Defense Minister's daughter, who is studying in the U.S. and smitten with McGee. Meanwhile, Gibbs investigates the death of the U.S. Marine who was killed in the bombing.

The dismembered fingertips and teeth of a murdered Marine are discovered in the stolen purse of a pickpocketer, launching NCIS on a mission to find a cold-blooded killer.

NCIS discovers that one of its former investigative assistants found brutally stabbed to death was selling details for how to rob a warehouse full of valuable possessions belonging to a woman convicted of fraud. Meanwhile, a new special agent joins the office.

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

NCIS connects a message in blood left by a murdered Navy commander to a manuscript that may contain classified military information.

To Gibbs' displeasure, Special Agent E.J. Barrett returns to lead the investigation of a seaman's death that may be connected to a series of port-related murders. Meanwhile, Ziva finally introduces her boyfriend, Ray, to the team.

The NCIS team tracks a Navy lieutenant's killer after a Pentagon security camera reveals a petty officer committing the crime. Meanwhile, Gibbs announces that Agent Barrett and her team will take over the Port-to-Port serial killer case.

After Tony's ex-partner, Danny Price, appears to be the Port-to-Port Killer's latest victim, he revisits his days as a detective in Baltimore, including his first encounter with Gibbs.

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

The lives of NCIS members are in jeopardy when they come face-to-face with the infamous Port-to-Port killer, on the eighth season finale of NCIS.

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

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

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

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

Meanwhile, Abby uncovers new information about her family after undergoing tests for a kidney donation.

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

Meanwhile, Tony and McGee try and find the perfect woman for Gibbs.

An NCIS case changes from accidental death to murder when evidence reveals that a Navy lieutenant died of forced over-hydration. Meanwhile, Gibbs meets Ducky's new love interest.

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

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

As the NCIS team continues its search for a missing Marine, Gibbs and Ziva travel to her last known whereabouts in Afghanistan. Meanwhile, Tony reveals his deepest fears and Gibbs is forced to relive events from his past.

After Anthony DiNozzo, Sr. is found in a car with a dead body in the trunk and no memory of the previous night, the NCIS team must figure out if he is capable of murder. Meanwhile, Tony is sidelined for this case and must go against orders to try and prove his father’s innocence.

When a Navy captain is killed in a hotel room, NCIS must track down and protect his very pregnant companion from unknown assailants. Meanwhile, Jimmy has problems of his own when he brings his future father-in-law to work.

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

When a Navy lieutenant commander is found dead in a building under construction, NCIS must search for a killer while dealing with interruptions from her distraught detective husband. Meanwhile, Ray’s return has Ziva thinking about her future.

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 in the past and present

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

Gibbs clashes with Dr. Samantha Ryan (guest star Jamie Lee Curtis) over the truth behind a navy reservist's possible suicide

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget tries to butter up Gibbs in hopes of joining the team.

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

A case hits close to home when the lead suspect in the murder of a petty officer is Director Vance's brother-in-law.

Following the murder of a Marine, Tony and Ziva join Ziva’s longtime friend and mentor in Columbia in a search for a missing Marine Lieutenant and Navy Chaplain. Meanwhile, Jimmy Palmer decides who will be his best man.

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

The NCIS investigation of a fire on a Navy vessel reveals evidence that elevates security at all U.S. Navy facilities worldwide. Meanwhile, DiNozzo and Ziva travel to Italy when an explosive device is found hidden on a Navy ship.

The NCIS team analyzes what secrets could be in the hands of a terrorist targeting the Navy when a high-tech bug is found inside a probationary agent’s tooth. Meanwhile, the festivities for Jimmy Palmer’s upcoming wedding continue with the bachelor party.

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

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

When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the NCIS team is assigned to investigate the strange case for one of their own. Meanwhile, the team is required to complete mandatory psych evaluations with a crisis counselor, and Gibbs is most concerned about Abby’s recurring nightmares since the bombing.

While on medical leave, Ducky orders the exhumation of a Navy commander’s body from a case closed 12 years ago. As a result, Gibbs tasks Ducky with a slightly different role on the investigation. Meanwhile, the NCIS team investigates the recent death of a Marine. As both cases unfold, the team begins to question whether the two are somehow connected.

When a helicopter crew is adrift at sea and later discovered on shore, the NCIS team must determine the cause of the crash and locate the missing pilot. Meanwhile, Tony and McGee channel their inner “Maverick” and “Iceman,” a la “Top Gun,” and Ziva challenges them to a dare.

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

When a Navy Lieutenant who recently returned home from the Middle East is found dead from a brutal attack, the NCIS team questions the victim’s friend, Marine Captain Joe Wescott. Gibbs realizes the Captain is suffering from post-traumatic stress disorder, but knows his experience overseas may also provide a key link to the crime.

Gibbs continues to work with Captain Wescott while he retraces his steps in order to help the NCIS team track down a terrorist. With Thanksgiving on the horizon, Abby’s enthusiasm for the NCIS family dinner is building, and Tony’s curiosity is peaking when he learns Ziva is making special plans for the opera.

As the NCIS team investigates a teenage girl’s abduction, Ziva and Abby work closely with her young friend who witnessed the kidnapping. As the investigation unfolds, Gibbs seeks help from a past contact, Miranda Pennebaker, a well-connected woman with questionable morals. Meanwhile, Tony gets jealous when he learns Ziva is making plans with a mysterious man.

Gibbs teams up with FBI Agent Fornell on a joint NCIS/FBI investigation after Fornell becomes the target of a shooting, but they face an unexpected twist in the case when their mutual ex-wife, Diane Sterling, gets involved. Meanwhile, rumors run wild among the group after Diane stays overnight at McGee’s.

It’s Christmas time and Tony DiNozzo can’t decide if he’ll be naughty or nice when his dad, Anthony DiNozzo, Sr., comes to town for a visit. Meanwhile, the NCIS team is “following the money” in order to solve a murder investigation, and Abby is bursting with excitement over all the holiday festivities.

While the NCIS team investigates the link to a dead journalist and a Navy petty officer, Ziva is taken aback by the sudden emotional visit by her father, who she hasn't seen in more than two years. While Ziva questions the purpose of her father's visit as the Director of Mossad, her father insists he is in the U.S. strictly to see his daughter for Shabbat dinner.

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

The NCIS team investigates a Marine’s car accident and ignites some upsetting past memories for Abby as a young girl on the trail of her first “case”.

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

On leave from NCIS while still grieving the loss of his wife and his kids’ mother, Director Vance discovers unexpected personal information that causes him to question everything.

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

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

A widowed Marine wife, whose husband was seemingly killed by a Taliban sniper, asks Gibbs' help to find out the truth. Meanwhile Vance is conducting interviews for a nanny.

The team investigates death of a navy medical officer aboard a ship that went through a storm. The prime suspect turns out to be a 4-star admiral, who is also McGee's estranged father.

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

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

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

A Department of Defense investigator scrutinizes the NCIS team’s response to the Bodnar case involving the murder of Ziva’s father and Vance’s wife. Meanwhile, the team examines whether a Petty Officer is suffering from paranoia or if his claims of being followed are tied to a matter of national security.

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

An explosion at a D.C. event that results in a casualty connected to the agency changes Parsons’ perspective on Gibbs and the NCIS team. Meanwhile, without badges, DiNozzo and McGee investigate the case as civilians, despite the case’s dangerous ties to each of them.

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

The NCIS team must rely on Twitter for a case involving a missing Navy Lieutenant. Meanwhile, McGee misplaces his badge but withholds the information from Gibbs and the authorities.

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

DiNozzo returns to his Baltimore Police Department days when he sees a felony suspect from a 15-year-old case at the NCIS crime scene of a murdered Petty Officer.

The Coast Guard Investigative Service works with the NCIS team when an explosion occurs on an oil rig; a mysterious prankster targets the team.

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

The team is forced to take another look at a hit-and-run murder case; McGee becomes suspicious of Tony's unusual behavior.

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

Complications arise when the NCIS team discovers a link between a murder victim and the current boyfriend of Gibbs and Agent Fornell’s ex-wife. Meanwhile, NSA Analyst Ellie Bishop adjusts to joining the NCIS team.

After a mysterious illness strikes children from military families, Gibbs and the team investigate the cause. Meanwhile, Abby and Jimmy partner with the Naval Medical Research Center to determine the strain of illness, all in hopes of delivering a cure before the holidays. Also, Director Vance struggles with forgiveness as his estranged father-in-law makes a surprise visit to his home.

When a stolen drone is linked to the elusive terrorist Parsa, the NCIS team partners with the Department of Defense, including Gibb’s former girlfriend Hollis Mann, to track down the device before it is used for a large scale attack. Meanwhile, McGee hesitates to ask for time off to attend a black-tie gala honoring his girlfriend.

In an effort to find the terrorist Parsa, Gibbs and the NCIS team track down one of his cohorts using evidence from the drone attack. Meanwhile, an emotionally shaken McGee struggles with the ramifications of the incident.

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

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

Someone winds up dead when DiNozzo confronts a man impersonating a Navy officer; DiNozzo's father needs to share a secret with his son.

After a bomb detonates in the dressing room at a military charity concert, the NCIS team must determine if the target was a washed-up ‘80s rocker or if the bomb was part of a larger scheme. Meanwhile, Jimmy prepares for fatherhood

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

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

After returning to her job at the Department of Defense, McGee’s girlfriend Delilah finds a break in a controversial case, prompting her to turn to the NCIS team for help. Meanwhile, McGee talks to DiNozzo about whether he should ask Delilah to move in.

After a Navy officer is found dead on a rural road, the NCIS team must ascertain if the murder was the result of a bar fight or because he knew too much about an attack on a fellow female officer. Meanwhile, DiNozzo and McGee start a juice cleanse to purge their bodies of impurities.

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

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

The NCIS team investigates whether a fire on a U.S. Navy ship that served as a secret detention site for indicted terrorists was accidental or an intentional diversion for an escape. Meanwhile, Gibbs travels to his childhood home following news of his father’s passing.

One month after Director Vance was kidnapped, Gibbs is assigned the role of acting director in his absence while the team searches worldwide for his whereabouts.

After a Navy lieutenant is found murdered in his hot tub, the team interviews several families in the victim’s peculiar neighborhood. Also, Torres must face the consequences after a volatile night out with Palmer.

One of the NCIS agents is starstruck after the team investigates an explosion outside the home of Navy Petty Officer First Class Todd Nicholas and his wife, popular reality TV star Sheba Nicholas. Also, Vance continues physical therapy for the injuries sustained when he was held hostage.

Gibbs’ quiet vacation at his remote cabin is interrupted by a surprise visit from Tobias Fornell and Navy Captain Phillip Brooks, as well as a call from NCIS asking for his help locating a robber hiding in the woods near him.

After a 50-year-old tape recording left by a murder victim is found, the NCIS team tries to exonerate Ray Jennings, the Marine serving a life sentence for the crime.

After NCIS arrives at a Halloween crime scene, Torres recognizes the victim as a friend from federal law enforcement training. Also, Jimmy thinks his lab is haunted by ghosts after objects keep mysteriously moving.

After a mural by a street artist and activist is stolen, the NCIS investigation leads to a conspiracy regarding a Navy contractor and the safety of ocean mammals. Also, Bishop shares a special connection with the street artist.