Based on the true story of the biggest breach in FBI history, “Breach” stars Ryan Phillippe as the young trainee assigned to get the goods on the informant in question, played by Chris Cooper. A very compelling story, with this interesting relationship at the heart of it all. Laura Linney is the agent Phillippe reports to. She’s strong and smart and knows she has her work cut out for her. This is definitely a thriller, and all the more scary knowing that this actually happened. First rate performances by all.