Immortalized in books and movies, and even in its own complex history, the Federal Bureau of Investigation (FBI) has long been shrouded in secrecy. Over the years, the FBI has grown from a small group of special agents to a multifaceted organization with 56 field offices, 400 satellite offices, four specialized field installations and more than 40 liaison posts.

The Bureau is responsible for everything from tracking down the nation's most dangerous criminals and organized crime figures to the recovery of precious works of art and the execution of counterintelligence. Today, the nation's top investigative agency faces its heaviest burden yet - bringing security to an insecure land.

From camping out in the FBI's crisis center to sitting in on a closed-door profiling session, National Geographic's The FBI takes viewers into the heart of America's most powerful law enforcement agency. With unparalleled access to Director Robert Mueller, the Bureau's special agents and its fabled team of profilers, cameras capture never-before-seen footage and bear witness to the war on terrorism as it unfolds in real-time. WIth special security clearance, viewers are privy to the FBI, its complicated history, its top agents and its most vital operations.