Gibbs sends Bishop and Quinn to Philadelphia to work with MI-6 Officer Clayton Reeves on the murder case of a British operative. Meanwhile, Quinn deals with the NCIS case that caused her to leave the field.
Parsons gripes about his project; then a bomb explodes, killing the SecNav; Gibbs volunteers for a spec op, which takes him to Iran, where he runs into Parsons, and where they investigate. Tony tries to pursue Ziva in Israel. [Continued.]
Tony searches for Ziva in Israel and elsewhere; he finally finds her, but he returns without her. Gibbs, Fornell, and others work hard on the case of the bomber. McGee makes a huge discovery, which allows Gibbs to solve and to take a shot.
A bomb explodes inside the unoccupied pad of a Navy jaygee; Gibbs and company investigate; Abby determines who built the bomb; Tony finds the seller of the explosive; the team find the jaygee, who changes his plan and ends his flight.
Gibbs and company investigate the death of a woman with an ID card of a sergeant in the US Marine Corps; McGee finds that the real sergeant died in Afghanistan three years ago. Gibbs and McGee go to Kabul, sort things out, and do some good.
A Navy petty officer dies of a gunshot in a park in Baltimore, Maryland; Gibbs and company investigate; at the scene Tony sees a clue and a man. Abby finds links, then the gang put the pieces together and nail the shooter. Tony nods off.
An explosion and a fire damage an offshore drilling platform near the Virginia Capes, killing one (a major in the US Marine Corps Reserve) and injuring many others; Gibbs and company, along with Abby of the CGIS, investigate. The CEO and the chief legal counsel of the oil company assure the SecNav and Gibbs of their utmost cooperation. Tony and McGeek trace one lead, which appears to reach a dead end, but which leaves egg on McGoo's face; Gibbs and the other Abby suspect that the target was not the platform but rather the dead victim. Tony and McGee plus Gibbs and ...
A Marine sergeant, Dawson, dies of gunfire during an alleged armed robbery of a men's clothing store in Washington, DC; Gibbs and company investigate; while at the scene Gibbs receives a call from a local cop nearby in Howard County, Maryland, near Baltimore, saying that his father, Jackson, has become involved in an "incident"; Jackson wants Leroy to go with him to see a fellow WW2 pilot in North Carolina, so they go. The rest of the team step up to the plate; Gibbs tells McGee to take the point; Tony and McGee compete and compromise; while Tony talks with Dawson's ...
At night at Quantico a hit-and-run driver kills a woman Navy petty officer; while investigating, Gibbs and company find a suspect, who has a solid but complicated alibi; the gang, a lawyer, and a local cop figure out the whole thing.
A security system detects a bug on the person of the SecNav; Tony contacts the NSA, where he finds a two-year-old paper describing such a breach; one man dies; the author helps the gang to nail the bad guys; Gibbs wants to keep her around.
A clown kills a Marine corporal; while investigating, Gibbs and company find Fornell, Diane, and her boyfriend, who says that he's someone else, and that he knows the clown. All the pieces come together, and the team bust the main bad guy.
Within 30 miles of Washington, DC, eight kids in Navy and Marine Corps families have suddenly become badly ill, requiring treatment in ERs and ICUs; Gibbs and company investigate; Carol, of the Naval Medical-research Center, joins the effort; immediately the number of sick kids grows to 14, then 19, 23, 28, and 34, and none of them responds to treatment. Duckie announces the first fatality, who was a veteran of Vietnam, then he describes the cause of death and the treatability in the kids. Abby says that she has misidentified the particular nature of the illness, so ...
A Navy petty officer dies of gunfire in a park in Washington, DC; Gibbs and company investigate; Hollis helps. The gang find an accessory for hire to a terrorist. An explosion kills six and injures 22, including Delilah. [Continued.]
While McGee stays with Delilah in a hospital, Gibbs, Tony, and Ellie find and recover a bullet, which bears the DNA of the wheelman, whom Gibbs clipped during the escape; Abby identifies him, and she and Tony gather data about him, which Gibbs and Duck review. Gibbs, Tony, and Ellie see the escape SUV, which bears a message; Abby finds a modification to it. McGee gets approval to return to work, but Dr. Cranston learns that McGee has avoided an unpleasant new truth, so she talks with him. CIA and NSA help with the search for the terrorist; McGee finds an address for ...
Ellie's gut says that Parsa is in his home district in NW Pakistan; there a SEAL team captures him alive. Gibbs, McGee, and Ellie fly to an aircraft carrier, where Gibbs and Ellie question him. Ellie gets into a bind, but Gibbs saves her.
An overturned van in Washington, DC, contains body armor, which Abby shows to be faulty and fatal; Gibbs and company find the body of the driver, then the source of the bad gear and the path to the troops in the Middle East. Justice wins.
When Tony seeks to question a man who appears to impersonate a Naval officer, the man draws a pistol; Tony kills him. The dead man proves to be a private investigator who had become involved in international intrigue. The gang sort it out.
Backstage before a charity-benefit concert in Washington, DC, an explosion kills a Navy petty officer first-class; Gibbs and company investigate; Abby fingers the bad guy, McGee finds out about him, and Gibbs and Ellie catch him at work.
In New Orleans, Louisiana, two local special agents of the NCIS, Pride and LaSalle, start to investigate the death of Dan McLane, who was not only a member of the US House of Representatives but also both a retired Naval Reserve commander and a retired agent of the NIS (before the NCIS); Dan had worked with Franks and had served as a mentor to both Pride and Gibbs; King Pride, a former partner of Gibbs, goes to Washington, DC, and spends time with Gibbs. Inter-agency intrigue begins; the FBI seizes control; a joint FBI-NCIS effort proceeds; Fornell joins the hunting ...
While investigating the death of a US congressman, the Gibbs team and the gang in Nola continue to seek both a killer and a connection to an old case. Another man dies. Ducky suggests a theory, and the bunch put all the pieces together.
Delilah finds a clue, which may help to solve the alleged death of a US Navy lieutenant, Kit, two weeks ago in Budapest, Hungary; then her boss orders her that she has never seen it; however, she surreptitiously speaks with Tony, McGee, and Gibbs, who sends Tony and McGee to check for chinchillas and to find evidence. Then Tony and McGee meet a man who claims to be an agent of the CIA, who tells a wild story to Vance and Gibbs, and who asks them to back off; still, though, Vance tells Gibbs and Ellie to continue pushing quietly. Abby and Jimmy, interpreting the ...
A distracted texting driver runs over the dead body of a Naval officer; Gibbs and company investigate; they find a connection to a previously unreported rape of a drugged victim. The team figure out everything, and they catch the bad guy.
During a court-martial of an Army first lieutenant, a Marine photojournalist disappears before he can testify; while Gibbs and company lend a hand, they find the body of the Marine, solve his murder and another one, and arrest two bad guys.
Tony goes to France to escort an admiral's daughter, Amanda, back to DC; meanwhile Gibbs and company investigate a death. Tony and Amanda run into trouble, work it out, find solutions for all seven executions, and report to the admiral.