NCIS feverishly investigates a global terrorist group that is recruiting teens via the Internet following a deadly bombing overseas that results in an emotional and surprising loss for the team, on the 12th season finale of NCIS.
A former Black Ops agent originally recruited and trained by Hetty Lange, returns to seek revenge.
Darwyn struggles to maintain his cover as he assumes command of a new Los Angeles sleeper cell and questions the experience and skill of his new FBI case agent; Farik's interrogators use new techniques to get him to talk.
