Drama based on the true story of the capture of a high-ranking FBI agent, who became the most dangerous security leak in US history. In 2000, surveillance expert Eric O'Neill is assigned to work at the Bureau's classified information division, under veteran agent Robert Hanssen. But his real assignment is to gather evidence on Hanssen, who has been selling State secrets to the Soviet Union for years. His task is complicated, though, as he grows to respect the man he must help expose. Starring Chris Cooper, Ryan Phillippe and Laura Linney.