Season 11, Episode 1 - Whiskey Tango Foxtrot
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. ...
Season 11, Episode 3 - Under the Radar
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.
Season 11, Episode 4 - Anonymous Was a Woman
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. ...
Season 11, Episode 5 - Once a Crook
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. ...
Season 11, Episode 6 - Oil and Water
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. ...
Season 11, Episode 7 - Better Angels
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. ...
Season 11, Episode 8 - Alibi
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.
Season 11, Episode 9 - Gut Check
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.
Season 11, Episode 10 - Devil's Triad
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. ...
Season 11, Episode 11 - Homesick
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. ...
Season 11, Episode 13 - Double Back
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. ...
Season 11, Episode 15 - Bulletproof
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. ...
Season 11, Episode 17 - Rock and a Hard Place
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.
Season 11, Episode 18 - Crescent City: Part 1
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. ...
Season 11, Episode 20 - Page Not Found
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. ...
Season 11, Episode 21 - Alleged
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. ...
Season 11, Episode 22 - Shooter
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.