We explore Soviet Lt. Col. Pyotr Popov, who offered his services to the U.S. before being caught. Then, meet CIA officer Chip Beck who refused to evacuate from Cambodia in 1975—until he rescued over 200 people from genocide at the Killing Fields.
We see how the CIA caught a spy within its Counterintelligence Division. How do you uncover a mole in your own ranks when anyone could be suspect? Then, we examine a bold plan to tunnel under the Berlin Wall where phone lines could be tapped.