They solve murders, catch spies, and prevent terrorist attacks. They are one of the most revered law enforcement agencies on the planet, and one of the least understood until now. Go behind-the-scenes with the federal agents of the Naval Criminal Investigative Service (NCIS). With re-enactments, on-location footage and interviews with agents, re-examine the agency's most challenging case - the bombing of the USS Cole - and see how the NCIS is staying one step ahead of the terrorists.