When a software engineer is taken out by a drone strike, the CBI steps in to investigate. The team comes upon four of the Red John suspects just as Jane finds an important clue to Red John's methods.moreless
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.moreless
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.moreless
A terrorist holds Ducky, Gerald and Kate hostage while the rest of the NCIS team tries to figure out how the terrorist got inside and how to get their people out safely.
When Chakotay is stranded on a planet that is in the middle of a major war, he violates the Prime Directive by helping the soldiers that discover him.