The World's Second Oldest Profession

S1, E2: One day in January, in the early 1980s, the FBI moves into an apartment in Manhattan. Their job is to spy on the neighbors across the hall, a Norwegian diplomat and his family. But what do they suspect? This thrilling political documentary begins to tell the remarkable story of Arne Treholt, suspected of being a possible agent for the enemy in the east, the Soviet KGB.