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.
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.
A former Black Ops agent originally recruited and trained by Hetty Lange, returns to seek revenge.
