Ari Haswari

Season One:
Bete Noire (16)
Reveille (23)

Season Two:
Twilight (46)

Season Three:
Kill Ari (Part 1) (47)
Kill Ari (Part 2) (48)

The character is introduced in Bete Noire. Pictures of him are seen in most of the episodes between Bete Noire and Reveille. We finally find out who he is in Reveille: We learn his name,we find out he likes to ride fast motorcycles, he went to Edinborough Medical School, he is in Mossad, that he has a Jewish father and a Muslim mother, and his father works for Mossad. Gibbs shoots him in the shoulder at the end of Reveille. Ari kills Todd with a sniper rifle at the end of Twilight. Ziva David kills Ari in Gibbs' basement at the end of Kill Ari (Part 2). Ziva then tells Gibbs that Ari was her half brother.