The NCIS team investigates a deadly car explosion in D.C. that connects to NCIS Special Agent Nicholas "Nick" Torres (Wilmer Valderrama), who disappeared six months ago while on a deep undercover assignment in Argentina. Also, Gibbs asks NCIS Special Agent Alexandra "Alex" Quinn (Jennifer Esposito) to shadow his team after rejecting eight agents she instructed and referred for the open position.
NCIS uncovers a bomb plot and a long-running theft ring while investigating a death at a Quantico reunion. Also Torres and Quinn adjust to life on Gibbs' team, including new seating arrangements in the squad room.
When the NCIS team investigates a marine sergeant's tragic fall from a building, her doctor, Grace Confalone (Laura San Giacomo), confides in Gibbs and suggests he treat it as a murder investigation. Also, Torres searches for a place to live.
After the body of a navy lieutenant is discovered aboard a destroyer during a tiger cruise, when civilian guests are allowed to spend the night on the ship, Gibbs, Quinn and Palmer travel out to sea to investigate. Also, McGee contemplates the perfect proposal for Delilah Fielding (Margo Harshman).
When a missing MI6 Officer is linked to a murdered petty officer, Gibbs sends Quinn and Bishop to Philadelphia to work with MI6 Officer Clayton Reeves (Duane Henry). Also, Quinn painfully recounts the NCIS case that made her leave field work. Tony Gonzalez, former NFL player and studio analyst for "The NFL Today," guest stars as NCIS Special Agent Tony Francis.
After a kidnapped petty officer escapes her captor, NCIS uncovers a connection to her missing husband. Also, Abby knits the NCIS newbies personalized gifts. Tony Gonzalez, former NFL player and studio analyst for "The NFL Today," guest stars as NCIS Special Agent Tony Francis.
Torres boldly breaks protocol when he learns a witness in an NCIS case is wanted by U.S. Immigration and Customs Enforcement. Also, Abby, Bishop and McGee woo landlord Tony DiNozzo Sr. (Robert Wagner) in the hope of subletting Tony's apartment.
After NCIS Agent Bishop is sent to Gitmo to gather evidence for a Navy chaplain murder case, she questions her previous work at the NSA. Also, Bishop's brothers, John and Robert (Jesse Bradford and Jesse Johnson), visit for the Thanksgiving holiday and pester her co-workers to find out who she is dating.
After the NCIS team tracks evidence from the murder of a Navy captain to Ducky's deceased mother, Ducky looks back and questions a pivotal life choice he made 37 years ago. Also, the team exchanges holiday gifts, and Gibbs spends Christmas dinner with Fornell.
NCIS searches for new leads after an undercover operation to apprehend a businessman who uses acts of terror to manipulate the stock market is compromised. Also, Bishop and Qasim (Rafi Silver) find a break in the case together.
After Gibbs spots the brother of an "NCIS Most Wanted" suspect, he immediately assumes his former alias and goes undercover with their infamous anti-government militia. Also, Bishop and Reeves partner on an off-the-books investigation.
The murder of a Petty Officer in a small town outside D.C. prompts NCIS to once again work with "The Sherlocks," a privately funded investigative team that includes their newest member, Anthony DiNozzo, Sr. (Robert Wagner). Richard Riehle returns as Walt Osorio, Jessica Walter returns as Judith McNight and Todd Louiso returns as Lyle Waznicki, all members of "The Sherlocks."
After Abby's homeland security think tank is compromised and she is found in possession of a real bomb, the NCIS team discovers the leader of the group has been murdered and a theoretical terror playbook has been stolen. The conclusion of this episode (Pandora's Box, Part II) is available on the playlist for NCIS: New Orleans (Season 3).
Bishop is more determined than ever to seek revenge for the murder of Qasim, her late boyfriend, after Gibbs and the team find a new lead in the Chen case. Also, Torres teaches the agents the art of pickpocketing.
McGee discovers his apartment has been torn apart by a robber trying to locate an item of great value hidden somewhere by the convicted criminal who previously owned the unit. Also, Congresswoman Flemming (Mary Stuart Masterson) tries to persuade Director Vance to pursue a career in politics.
When a Marine is murdered at an event for the Honor Flight Network, a non-profit that arranges for veterans to visit the World War II, Korea and Vietnam War Memorials for free, the NCIS team must rely on an irritable Vietnam War veteran, Henry Rogers (Bruce McGill), to provide details on the victim's whereabouts throughout the day. Also, McGee and Bishop investigate a juicy rumor about Quinn and Torres.
After a vice admiral's laptop is infected with ransomware, he enlists McGee and the NCIS team to track down the hacker before the computer virus eliminates his personal and professional files. Also, Alex takes time off to assist her mother, Marie Quinn (Mercedes Ruehl), after she receives a “911” text.
The stress of McGee and Delilah's (Margo Harshman) imminent wedding takes its toll, as Delilah is rushed to the hospital. Also, the NCIS team travels out to sea after a young and healthy Petty Officer aboard a Navy destroyer dies in his sleep.
Gibbs fights for his life aboard a Navy hospital ship after being shot, while DiNozzo and Joanna Teague travel to Shanghai to try and take down the Calling. Jon Cryer begins a multi-episode arc as Gibbs' surgeon, Dr. Cyril Taft. Mimi Rogers returns as CIA Officer Joanna Teague.
Gibbs calls on the team to assist DEA Agent Luis Mitchell (John Gabriel) with a case that keeps going cold, but DiNozzo discovers there is more to Gibbs' personal connection to the agent and his desire to help him succeed. Also, the team gossips about Gibbs' new look after he replaces his standard military haircut and polo shirt for a modern cut and tailored dress shirt.
After a Marine is found murdered in Quantico hours after calling Gibbs to discuss a possible case, Bishop and McGee go undercover as a married couple to run surveillance on a Marine Lieutenant and his wife.
While visiting a pharmaceutical lab on a murder case, Abby is trapped with no communication to the outside world after armed men take over the building and hold everyone hostage. Former NFL player Tony Gonzalez guest stars as NCIS special agent Tony Francis.
When a petty officer's murder matches the M.O. of a local serial killer, the NCIS team must determine if this is the killer's latest victim or the work of a copycat. Also, McGee and Delilah must learn to compromise before moving in together. Series Star Rocky Carroll directs the episode. Margo Harshman returns as Delilah Fielding.
The NCIS murder case of a retired Navy Lieutenant Commander forces Ducky to reveal his participation in a secret society that solves cold cases. Jessica Walter guest stars as Judith McKnight and Richard Riehle guest stars as Walt Osorio, both members of the secret society.
DiNozzo is reunited with his ex-girlfriend, Jeanne Benoit, when insurgents in Sudan attack a group of volunteer doctors, including her husband. DiNozzo and McGee travel to the crime scene for the joint murder and kidnapping case and join the search for the missing doctors. Jon Cryer and Scottie Thompson return.
In order to clear his name, a petty officer volunteers to be court martialed if NCIS agrees to conduct its own investigation after his murder case is dismissed due to a mishandled warrant. Also, Bishop and Jake discuss their marital problems. Jamie Bamber returns.
In the hopes of sparing a family further tragedy, the Secretary of the Navy calls on NCIS to help a sailor battling leukemia locate a bone marrow transplant after his two Marine siblings are killed in the line of duty. Also, Bishop returns home to Oklahoma for the Thanksgiving holiday. Lindsay Wagner guest stars.
After Ducky is attacked by a man claiming to have information about his half-brother who died decades ago, the NCIS team searches for the perpetrator, as Ducky recalls the final emotional days he had with his sibling. Also, with the holidays approaching, Bishop and Jake (Jamie Bamber) discuss the future of their relationship. Adam Campbell returns as "Young Ducky."
After the passengers and crew of a private plane traveling from New Orleans to Washington D.C. are lethally poisoned, all evidence points to the missing chef, Abby's brother, Luca (Tyler Ritter). Gibbs and the D.C. team work in conjunction with Pride and the New Orleans team to locate Luca and determine why a private tech company was targeted. (Part Two continues on NCIS: New Orleans: Season 2, Episode 12)
While investigating the murder of a seaman who was set to testify before a grand jury, the NCIS team uncovers the resurgence of an international human-trafficking ring. Also, McGee hopes to spend the night at a colleague's home after a storm causes massive power outages in the city. Directed by series regular Rocky Carroll.
When a deep sea diver is murdered on the job, his body and suspected co-workers must remain in a high-tech decompression chamber for four days, leaving the NCIS team to complete an unorthodox investigation from outside the tank. Maya Stojan guest stars as Meredith Ragen, a deep-sea diver.
When Secretary of the Navy Sarah Porter (Leslie Hope) learns her daughter has been kidnapped, the NCIS team partners with the FBI to track the case, determine a motive and bring her home. Also, McGee's childhood friend, NCIS Special Agent Valerie Page (Christina Chang), is in town to assist the team with advance tactics training. Joe Spano returns as Senior FBI Agent T.C. Fornell.
Doctor Cyril Taft (Jon Cryer) experiences the rush of an NCIS case after he is assigned surgical duty to Gibb's suspect and finds key evidence. Also, Dinozzo pays Jeanne Benoit (Scottie Thompson) a visit as he chases a lead involving doctors in Sudan. Laura San Giacomo Guest Stars as Dr. Grace Confalone.
The NCIS agents' personal plans are interrupted when each of them catches errors in a seemingly cut-and-dried closed case. Also, McGee and Delilah (Margo Harshman) argue over the importance of not discussing work during dinner, while DiNozzo bores his date with shop talk.
The NCIS team re-examines an ambush on a group of Special Ops snipers in Iraq after an American couple is attacked in the same area six months later. When Gibbs discovers he needs the account of the lone survivor, Marine Gunnery Sergeant Aaron Davis (Taye Diggs), he tries to connect with the wounded warrior who is being treated for PTSS at Walter Reed Medical Center, on the 300th episode. Laura San Giacomo returns as Grace Confalone. The episode features a special performance by the MusiCorps Band, part of a music rehabilitation program for wounded veterans.
The NCIS team must ascertain who is lying, the wife or the mistress, after the women accuse each other of murdering a Navy Public Affairs officer. Also, Anthony DiNozzo, Sr. (Robert Wagner) helps a homeless woman who believes he is her father.
Gibbs and Senior FBI Agent T.C. Fornell (Joe Spano) unite after two British prisoners, including a former spy, escape and arrive stateside via a shipping container. Also, McGee is busy apartment hunting and determined to find out how DiNozzo purchased his lavish place.
When a 14-year-old foils a home invasion, Gibbs suspects the teenager is withholding pertinent details. Also, Director Vance and Senior FBI Agent Fornell travel to London as part of the ongoing escaped British spy case. The episode features an appearance by First Lady Michelle Obama as she welcomes Gibbs and the wife of a Marine to the White House for a "Joining Forces" roundtable with military spouses.
The NCIS team, alongside the FBI and MI6, continue an international manhunt for an escaped British spy who has left one colleague fighting for their life in ICU. Sarah Clarke and Duane Henry guest star.
Gibbs and McGee travel to Russia to safely escort home an NCIS computer engineer connected to classified intel, but their mission is compromised and they are forced to go off the grid while hunted by a Russian mercenary group. Meanwhile, the team in D.C. frantically uses every asset and inter-agency contact they have in an attempt to locate their missing team members.
When a Navy Lieutenant is killed on his way to a private meeting with the President, the NCIS team must determine if the murder was part of a recent stream of muggings in the area or a targeted hit to keep intel secret. Tony Gonzalez guest stars.
When an NCIS case reveals a connection to Ducky's estranged childhood best friend, he and Special Agent Bishop travel to London for interviews with family and co-workers of his friend. While there, Ducky finds himself reminiscing about the choices he made in his past and the subsequent impact they had on his adult life. Adam Campbell and Alice Krige guests star.
The Secretary of the Navy assigns the NCIS team to a joint terrorism task force after a Naval research scientist is murdered and the lead suspect is wanted by the Russian government. In order to get a jump on the case, Gibbs has DiNozzo run interference with the leader of the task force, FBI Agent Leia Pendergast. Stephanie Jacobsen guest stars.
During a joint Coast Guard and NCIS training exercise at sea, Gibbs and CGIS Agent Borin spot a deceased man overboard, who is discovered to be a missing crew member from a ship 60 nautical miles away. Upon boarding the ship for questioning, Gibbs finds himself on a vessel that has been commandeered by pirates. Diane Neal guest and Jim Beaver guest star.
The NCIS team must determine if the murder of a Navy commander's wife is linked to her profession as a therapist or an act of terrorism after finding the commander's name on a Jihadist target list. Meanwhile, the team discusses Halloween costumes and Tony's recent dating habits.
After investigating the murder of a retired Master Sergeant, the NCIS team uncovers a fraudulent charity that preys on those searching for missing military personnel. Meanwhile, Bishop agonizes over the results of her probation evaluation, and Tony contemplates adopting stray cat that followed him home.
While the NCIS team investigates the cause of a hit and run accident that resulted in the death of a Petty Officer, Gibbs searches for a way to clear a Navy Hospital Corpsman, who has served two medical tours in Afghanistan, after she's indicted for illegally providing medical aid to the victims of the crash, even though the surviving victims swear by her life-saving techniques.
While stuck at the Dulles airport due to inclement weather, DiNozzo, Bishop and her husband Jake work an NCIS case involving an elevated terrorist threat at Northeast airports during the Thanksgiving travel surge. Jamie Bamber guest stars.
The NCIS team consults with three cyber-terrorists they imprisoned after a city-wide Internet shutdown the week before Christmas. Also, McGee reflects on the case and Gibbs' infamous rules as he pens a heartfelt letter to his father.
The NCIS team must investigate a series of crime scenes that appear to be copy-cats of previous cases. Also, two of Gibbs' ex-wives, one of which the team has yet to meet, show up at a crime scene to discuss something important with him. Jeri Ryan guest stars.
The NCIS team searches for a home-grown terrorist after a rescue mission in Syria reveals an American was involved in the capture of a social worker. Meanwhile, McGee and Bishop question DiNozzo's unusual behavior. Joe Spano and Marisol Nichols guest star.
Gibbs and the team investigate when a Navy lieutenant who is set to be the first openly gay servicemember to receive the Medal of Honor is murdered. Also, as his wife's due date approaches, Palmer prepares for fatherhood with an NCIS baby shower. Rocky Carroll makes his directorial debut.
DiNozzo returns to the military academy he attended as a teenager after a murdered Marine and alumni of the school is found clutching the photo of a current student. Also, Bishop and her husband invite Gibbs and the team out for a special dinner.
The NCIS team suspects Gibbs' arch-nemesis is behind an explosion at a summit for global terror event, but Gibbs elects to sit out the investigation in order to help a grief-stricken Fornell, whose life is on the verge of imploding following his wife's murder.
Evidence in an NCIS murder case reveals a rare painting on loan had been swapped for a fake, prompting DiNozzo, Sr. to share his knowledge and contacts of the black market art world with the team. Robert Wagner guest stars.
The murder of a petty officer sparks a lead in a 40 year old airport bombing cold case that Gibbs and DiNozzo have been assigned to for the past two years. Also, McGee is jealous that he was not previously briefed on the cold case.
DiNozzo is partnered with his girlfriend ATF Special Agent Zoé Keates after evidence reveals that the murder weapon in an NCIS case was originally purchased for the controversial ATF sting operation "Operation Fast and Furious." Also, Anthony DiNozzo Sr. returns to town for a special dinner to meet his son's girlfriend. Robert Wagner and Marisol Nichols guest star.
Gibbs and Bishop travel to Afghanistan after the murder of a Marine in D.C. is linked to a terror group holding another Marine hostage overseas. Also, DiNozzo is upset that McGee was chosen to be the new face of NCIS for all recruitment brochures.
Special Agent Ned Dorneget from NCIS cyber operations assists the team when a Navy ensign who worked in the Office of Naval Intelligence is murdered. Also, the team discovers that Jake and Gibbs have become good friends. Matt Jones and Jamie Bamber guest star.
The NCIS cyber case turns into a united global effort after evidence confirms "The Calling," an international terrorist group that recruits children through the internet, has been purchasing S-bombs off the black market. Matt Jones guest stars.
NCIS feverishly investigates a global terrorist group that is recruiting teens via the Internet following a deadly bombing overseas that results in an emotional and surprising loss for the team. Mimi Rogers guest stars.
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. Guest stars include Colin Hanks and Joe Spano.
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. Joe Spano guest stars as Senior FBI Agent T.C. Fornell.
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. Roma Maffia guest stars as NCIS Special Agent Vera Strickland.
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. Margo Harshman guest stars as Delilah Fielding.
NCIS partners with the Coast Guard Investigative Service (CGIS) to investigate a suspicious explosion on board an oil rig. Meanwhile, no one is safe from a mysterious prankster who is targeting the NCIS team. Diane Neal guest stars as Special Agent Abigail Borin.
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. Ralph Waite guest stars as Jackson Gibbs.
The NCIS team is forced to re-examine a hit-and-run murder case when a former FBI agent turned lawyer confides in Gibbs that her client's confidential alibi is solid. Meanwhile, McGee grows suspicious of Tony's strange 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. Emily Wickersham joins the NCIS team as NSA Analyst Eleanor "Ellie" Bishop.
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. Joe Spano and Melinda McGraw guest star.
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. Meredith Eaton and Ben Vereen guest star.
When a stolen drone is linked to the elusive terrorist Parsa, the NCIS team partners with the Department of Defense, including Gibbs' 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. Susanna Thompson guest stars.
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.
After uncovering faulty bulletproof vests in a truck filled with stolen U.S.M.C. merchandise, the NCIS team attempts to locate both the source and any vests that had been shipped to military personnel overseas.
When DiNozzo confronts a man impersonating a Navy officer, guns are drawn and the perpetrator is left dead. The subsequent investigation uncovers that the only eyewitness is DiNozzo's father, who is in town to disclose a secret to his son. Robert Wagner guest stars.
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. Keith Carradine guest stars.
When the body of Congressman Dan McLane, a former NCIS agent, washes ashore in New Orleans, Gibbs reunites with his former colleague, NCIS Special Agent Dwayne Cassius Pride, in a joint case between the two field offices and the FBI. The teams must work together to determine if the murder was politically based or linked to McLane's most well-known case, the arrest of the Privileged Killer, a serial murderer who targeted military and public servants. Scott Bakula, Lucas Black, Zoe McLellan, and CCH Pounder guest star.
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. Scott Bakula, Lucas Black, Zoe McLellan, and CCH Pounder guest star.
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. Margo Harshman guest stars.
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.
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, on the 11th season finale of NCIS. Episode honors the memory of recurring guest star Ralph Waite.
Harper Dearing's latest act of terrorism ripped through NCIS headquarters in last season's cliffhanger finale, sparking a cross-agency manhunt for the criminal mastermind on the 10th season premiere of NCIS (Richard Schiff guest stars).
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. Michael Des Barres guest stars.
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. Diane Neal returns to guest star as CGIS Agent Abigail Borin.
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. Ralph Waite returns to guest star in his role as Gibbs' father, Jackson Gibbs, and Billy Dee Williams guest stars as a World War II veteran, Leroy Jethro Moore.
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 (Brad Beyer). 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 (Brad Beyer) 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 (Alex Kingston), 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 (Joe Spano) 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 (Melinda McGraw), 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. (Robert Wagner), 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 (Michael Nouri), 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.
The wife of a Marine who specialized in K-9 bomb detection urges the NCIS team to investigate the recent death of her husband in Afghanistan. Meanwhile, Director Vance asks for the team's assistance as he interviews nannies.
A massive storm brings the NCIS team aboard the USS Borealis, where everyone becomes a suspect once the crime scene proves that Mother Nature wasn't the only culprit. Tension builds when McGee discovers that his estranged father, Navy Admiral John McGee (Jamey Sheridan), was on board during the incident.
When a Navy reservist returns home to find her husband missing and her living room covered in blood, she turns to the NCIS team to bring him home. Meanwhile, Tony suspects that Ziva is planning a risky move to avenge her father's death.
A Department of Defense investigator (Colin Hanks) 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 and Jackie Vance'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. Colin Hanks, Muse Watson, and John M. Jackson guest star.
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. Lily Tomlin guest stars as McGee's Grandmother.
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.
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 (guest star Larry Miller).
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, on the 200th episode of NCIS. Guest stars Muse Watson, as Mike Franks, Ralph Waite, as Jackson Gibbs, Joe Spano, as Senior FBI Agent T.C. Fornell, Darby Stanchfield, as Shannon Gibbs and Rudolf Martin, as Ari Haswari, return for the milestone episode.
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, on NCIS. Perrey Reeves guest stars as Wendy Miller, DiNozzo's journalist ex-fiance'.
When a high-level security Navy reservist is found dead, Gibbs goes face-to-face with Dr. Samantha Ryan of the PsyOps Division to uncover the truth behind the potential suicide. Meanwhile, DiNozzo argues with accounting after seeing McGee's paycheck. Jamie Lee Curtis guest stars as Dr. Samantha Ryan.
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. Jamie Lee Curtis returns as guest star Doctor Samantha Ryan, and Sean Astin guest stars as Tyler Elliott.
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. Jamie Lee Curtis and Karina Lombard guest star.
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. Gaius Charles guest stars as Baltimore Detective Jason King.
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. Joel Gretsch guest stars as NCIS Special Agent Stan Burley.
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. Jamie Lee Curtis returns as Samantha Ryan and Richard Schiff guest stars as Harper Dearing.
Terrorism threatens to shake the foundations of the Navy and NCIS, when the team continues to be eluded by the newest member of the NCIS Most Wanted Wall. Meanwhile, Jimmy Palmer's destination wedding is impacted by the case. Jamie Lee Curtis returns as Samantha Ryan, Scott Wolf returns as Jonathan Cole and Richard Schiff returns as Harper Dearing.
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.
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.
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.