Ziva is first introduced in "Kill Ari (Part I)" and becomes the first and only full-time Israeli character on American primetime television. She is the half-sister of the show's primary antagonist at the time, having same father as Ari. She is a distinctly more sympathetic figure, initially defending Ari and believing him to have been completely innocent of the accusations. Israelis in general are depicted in a positive light, though Ziva's father Eli David is portrayed ambiguously, and Gibbs briefly mentions the Lillehammer affair, in which a Moroccan waiter was killed after being misidentified as a perpetrator of the 1972 massacre of Israeli athletes in Munich, Germany, in Part I.