The gripping inside story of an American traitor - and the man who ultimately brought him to justice.
Robert Philip Hanssen was one of the most trusted Russian counterintelligence experts at the FBI, where his trademark black suits, pale complexion, and dour demeanour earned him the nicknames "Dr Death" and "The Mortician." In exchange for cash, diamonds and affirmations of his brilliance, he would sell thousands of pages of US intelligence to Moscow - with dire consequences for America's national security and without ever revealing his identity to the Russians.
Louis J. Freeh, the straitlaced, square-jawed FBI director, restored the Bureau's power to heights unknown since the glory days of J. Edgar Hoover. He weathered a series of crises by developing self-protective political instincts that shaped his every move. But he knew that before his mission to revive the FBI was complete, he had to catch a betrayer within its own ranks.