Director Billy Ray (whose previous feature was also a true story: Shattered Glass, about the young writer who fabricated stories for The New Republic) and co-screenwriters Adam Mazer and William Rotko do an extraordinary job of maintaining the tension as the story leads to the conclusion that's been revealed in the first few frames (i.e., Hanssen's arrest in February 2001); the exquisite torture of O'Neill's having to keep Hanssen distracted while Bureau technicians search the latter's car is but one example. Moreover, notwithstanding the plot developments, the filmmakers manage to keep their focus on the personal interactions that are the film's key element: the relationships that O'Neill maintains with Hanssen, his father (a cameo by Bruce Davison), his wife (Caroline Dhavernas), and others are entirely credible. At once fascinating and horrifying, Breach is inarguably one of the best films of 2007. --Sam Graham