Gibbs, DiNozzo and CIA Officer Joanna “Dorneget’s Mom” Teague had tracked Luke to Zakho, Iraq, where he was spirited away by the kid-targeting terrorist group known as The Calling. There, Gibbs split off from the others to track a suspicious girl through a marketplace. She ultimately gave Boss the slip, leaving Gibbs out in the open, where Luke coldly popped the NCIS leader, first in the leg and then in the chest.