Breach

Eric O'Neill (Ryan Phillippe), a low-level surveillance expert with the FBI, is assigned to clerk for Robert Hanssen (Chris Cooper), a senior agent suspected of being a traitor to the country. As O'Neill gains Hanssen's trust, he finds himself in a lethal game of spy vs. spy, where nothing is as it seems, leading him to confront his handler, Kate Burroughs (Laura Linney), and ultimately play a crucial role in bringing about Hanssen's downfall.