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

At the high school at Quantico, students and teachers fall asleep while in class; Gibbs and company investigate; one girl disappears. A grandfather both helps and interferes. Temp interns join. The gang solve the case and find the girl.

A woman Marine sergeant, who's a bomb-disposal tech, shoots to death an intruder in her pad; Gibbs and company investigate; Fornell and another FBI member become involved. The gang find everyone and figure out everything; it all works out.

The body of a petty officer shows up in a hot tub; Gibbs and company investigate; Ducky sees an unusual clue; Abby finds a link to the Royal Navy. A Royal Marine major and a CIA agent prove to be something else. The gang catch the bad guy.

A shooter kills three people, including a Navy commander, on live talk radio; Gibbs and company investigate; they believe that the host was the main target. The gang pursue clues to a bomb at a baseball diamond, where they nab the bad guy.

A Naval Reserve lieutenant, who's a chemical engineer, dies when a city bus accidentally hits her on a street in Washington, DC; Gibbs and company investigate. Abby deciphers mysterious writings; the gang figures it out and nab the perp.

An admiral finds the body of a long-time friend; Gibbs and company investigate. Tony and Ziva pick up Tony's father, who appears to have become connected with the victim. Sr. does a favor, and Ziva accompanies him. The gang figure it out.

Vance hosts a conference of high-level members of the NCIS; he invites Eli, who accepts. Eli's presence raises security concerns; Gibbs and company take part in the protective arrangements. Threats arise, and the gang respond. [Continued.]

An attack has killed one and left Vance with serious injuries; Gibbs takes charge by Vance's order. Eli reveals details about an operation 22 years old. Gibbs and the gang put the pieces together. The bad guy emerges, and justice prevails.

A Navy petty officer, who's the only witness in a civilian capital-murder trial, disappears; Gibbs and company investigate in response to a request by a commonwealth attorney. The gang puts all the pieces together, and justice prevails.

A Marine first lieutenant dies of gunfire during a dinner cruise; Abigail Borin, of the CGIS, also is a guest during the same event; she, Gibbs, and the gang investigate together. They find and fit the pieces, and they nab the bad people.

A Navy recruiter dies after becoming shoved down a staircase at a high school in Fairfax, Virginia; Gibbs and company investigate. Dr. Magnus, Ducky's predecessor, visits. Gibbs and the gang eventually figure it out and finger the bad guy.

Two teenagers find the battered body of a Marine Corps Reserve sergeant in his own backyard; Gibbs and company investigate. The team find evidence of sad stories. Gibbs pursues a bruise and figures it out, then the gang bust the bad guy.

Someone shoots and kills the executive officer (XO) of a Naval vessel, a commander, in his own stateroom; Gibbs and company investigate. However, a shrink (a persistent and presumptuous one) arrives to conduct mandatory psychologic evaluations for all members of the gang, and she accompanies them aboard the ship. Ziva recognizes the spent brass as Russian. Word of the murder spreads fast, for seven international journalists are aboard as guests; one reporter makes a confession and reveals a potential powder keg. The team continue, and they eventually find the solution. Meanwhile, the shrink also continues, eliciting a number of flashbacks, mostly related to Kate Todd, a former member and special agent. Eventually Tony and Gibbs realize who the shrink is, then she submits her report to the director.

A US Marine dies in an explosion at a US embassy; he saves a foreign official and others; the NCIS provides security to the official's daughter in Washington, DC; kidnappers abduct her, and another man dies. The Gibbs gang figure it out.

A Metro cop in Washington, DC, finds a set of severed fingertips which prove to be those of a Marine corporal; Gibbs and company investigate; McGee finds the corresponding body in the local morgue; Ducky concludes that the corporal was a victim of stretching to death on a rack. McGee and Ziva meet Max, who used a credit card of the dead Marine; excitement occurs while McGee interviews her; Tony and Ziva meet and interview another interesting chick; McGee pursues with Max. Gibbs asks whether the corporal died because Max, a former girlfriend, made a record score on a video game. Ziva gets a lead on a major game programmer, but he has disappeared; Gibbs meets an arms dealer. Tony and McGee find the body of the missing programmer, with mutilations identical to those on the Marine. Gibbs and McGee get a confession, then the gang search for a particular computer; McGee guides Gibbs, who finds it and announces "game over". Tony makes a date for McGoo.

Two teenagers find the body of a former NCIS employee; Gibbs and company investigate; in the trunk of the victim's car Gibbs and McGee find stolen property from a current case. The gang find the details and the people responsible.

A "meter maid" sees a body inside a home in Washington, DC; the victim, a retired Marine colonel, received seven blows of an ax; Gibbs and company question a prime suspect, who denies involvement and helps Gibbs to arrest the real killer.

In a national forest near Washington, DC, a young couple find the body of a Navy lieutenant commander in his dress-blue uniform; Gibbs and company investigate; on a rock nearby Tony finds a single word written in the victim's blood. The Metro PD finds the victim's abandoned car in Washington. Ducky finds that the shooter used ammunition of an unusual type, Gibbs and McGee talk with a specialty publisher, and Tony and Ziva find the body of an FBI agent, so Fornell enters the picture. The publisher leaves the country, then Gibbs and Fornell speak with the author of a mysterious book, who tells them about the contents. Tony, McGee, and Ziva arrive at a self-store room in time to see two stars and a couple of helpers get blown up; the admiral recovers well enough to go home, and he gives Gibbs and Fornell a lead; they pursue it, but Abby says to hold the phone, then she directs them to the real killer, and they nail him.

Gibbs and company investigate the murder of a member of the US Navy; EJ has investigated three previous similar deaths, so Vance gives her the lead. A suspect turns out to be another victim. Ziva's boyfriend is something else. [Continued.]

EJ and her team take over the P2P case; Gibbs and company investigate the death of a Navy woman officer. The solution, first believed to be simple, proves to be complicated. The killer jumps Ziva, and the gang pounce on him. [Continued.]

Gibbs and company investigate a body wearing a dress-blue uniform of a three-star admiral; Tony recognizes the victim; they first suspect another P2P killing; however, Ducky suggests otherwise. The gang find both the killer and the motive.

EJ and her team investigate yet another P2P murder; the victim is an NCIS agent from Norfolk; Gibbs and company pitch in, as does Franks. Kort, a CIA agent, spills in a briefing. Both Franks and EJ encounter the prime suspect.

Gibbs and Tony follow EJ and her team to a nearly vacant building; they find that the P2P murderer has killed Levin, seriously injured Cade, and kidnapped EJ; Gibbs pursues the suspect and EJ; he finds her, left to suffocate. McGeek traces a phone number to CI-Ray (Ziva's boyfriend). Ducky, with help from Gibbs, explains the changes in the MO of the killer. From Levin's left forearm EJ secretly removes a small object. Ziva tries to intercept Ray, but Cobb, the suspect, intercepts and kidnaps her; later, while Gibbs, Tony, McGee, and EJ are present inside a hotel room, Cobb arrives, enters, and surrenders, but he refuses to tell where he put Ziva. However, Abby provides clues to a place, where the gang plus Ray find and rescue Ziva, who gives explanations. Back at the HQ, Cobb escapes with two hostages; Gibbs and others follow; a confrontation ends the career of the P2P killer. The SecNav resigns, and his successor gives Tony a highly sensitive and classified task.