Joseph E. Davies

Ambassador Joseph Davies is sent by FDR to Russia to learn about the Soviet system and returns to America as an advocate of Stalinism.

Physicist Ted Hall is recruited to join the Manhattan Project as a teenager and goes to Los Alamos with no idea what he'll be working on. When he learns the true nature of the weapon being designed, he fears the post-war risk of a nuclear holocaust and begins to pass significant information to the Soviet Union.