Eight-part miniseries about CIA officers trying to ferret out a mole in their ranks in the 1980s to save the lives of Soviet agents spying for the U.S. It is based on the book 'Circle of Treason: A CIA Account of Traitor Aldrich Ames and the Men He Betrayed' by retired CIA officers Sandra Grimes and Jeanne Vertefeuille, and is produced by Morgan Hertzan, Rudy Bednar and Andrew Chapman.