Breach is a 2007 American historical and political thriller film directed by Billy Ray. The screenplay by Ray, Adam Mazer and William Rotko is based on the true story of Robert Hanssen, an FBI agent convicted of spying for the Soviet Union and later Russia for more than two decades, and Eric O'Neill, who worked as his assistant and helped bring about his downfall. O'Neill served as a consultant on the film. The film received generally positive reviews.