During the episode "Kill Ari (Part 2)", NCIS Special Agent Gibbs finds himself cornered by an armed Ari, but Ziva emerges at the last minute and kills Ari with a single gunshot wound to the forehead, similarly to the way Ari had shot Agent Kate Todd in the season 2 finale, "Twilight". After Ari's death, she asks to be assigned as a liaison for Mossad at NCIS, where she subsequently joins Special Agent Gibbs' team in the episode "Silver War", permanently replacing the deceased Agent Todd.