NCIS will pay the ultimate price when a hunt for a terrorist assassination team turns deadly for one NCIS team member, on the second season finale of NCIS.

Gibbs' worst fears are confirmed when he learns that his nemesis, Arab/Israeli double agent Ari (Martin), is back in Washington D.C. on assignment to kill him. Ultimately, the NCIS team discovers that Ari has a bigger plot… and they end up paying the ultimate price trying to thwart it -- the death of a team member.