Special Agent Leroy Jethro Gibbs is the leader of a team of special agents belonging to the NCIS (Naval Criminal Investigative Service) Major Case Response Team. Gibbs, a former Marine, is a tough investigator and a highly skilled interrogator who relies on his gut instinct as much as evidence. Gibbs' second in command is Senior Field Agent Tony DiNozzo, a womanizing, movie-quoting former Baltimore Homicide Detective, who despite being the class clown always gets the job done. The team also consists of probationary field agent Ziva David, a former Mossad officer who is a skilled fighter, as well as Junior Field Agent Timothy McGee, a computer-savvy agent often mocked by DiNozzo. Assisting them are Abby Sciuto, the energetic-but-Goth lab tech who is like a daughter to Gibbs, and Dr. Donald Mallard, nicknamed Ducky, the eccentric medical examiner full of unusual stories. This team of elite agents, based in Washington, D.C., solve criminal cases involving Marine and Navy personnel and their families, sometimes traveling the United States - or the world - to do it.

The Naval Criminal Investigation Service's Office of Special Projects takes on the undercover work and the hard to crack cases in LA. Key agents are G. Callen and Sam Hanna, streets kids risen through the ranks. Special Agent Kensi Blye, a forensic sleuth and unbeatable undercover operator rounds out the team of Agents. LAPD Detective Marty Deeks is a liaison officer that partners with Blye and is quickly picking up her undercover wits. Eric Beal's computer wizardry is invaluable, he works with Nell Jones, an intelligence analyst to whom Hetty quickly took a liking to, and far from HQ, the veteran chief has a freer hand than even the Director himself.

National Geographic: Inside The Real NCIS: 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.