"Shell Shock (Part II)" is the seventh episode of the tenth season of the American police procedural drama NCIS and the 217th episode overall. It originally aired on CBS in the United States on November 20, 2012. The episode is written by Gina Monreal and directed by Tom Wright and was seen by 16.47 million viewers.Gibbs continues to work with Captain Wescott while he retraces his steps in order to help the NCIS team track down a terrorist.