The gang mourn the death of Kate; they fondly recall her and deal with her death in their different ways. Kate appears to them individually in their daydreams and fantasies. Meanwhile Ari puts a round into Abby's lab, and the NCIS gets a new director, Jenny Shepard, who shares a history with Gibbs. Then Ziva David, a Mossad officer, arrives to persuade Gibbs not to kill Ari, who, she says, is also a Mossad officer. Ziva and Jen also share a history. Jen likewise seeks to persuade Gibbs that Ari is not the sniper. Abby predictably provides much helpful data. Ziva receives an important call, and Ducky accepts an invitation to an unusual meeting. [To be continued.]