Peter David | In Search Of History - The Boy Who Gave Away The Bomb (History Channel Documentary) @PeterDavid7KQ201 | Uploaded July 2018 | Updated October 2024, 7 hours ago.
Narrated by David Ackroyd

Ted Hall was an American physicist and an atomic spy for the Soviet Union, who, during his work on US efforts to develop the first and second atomic bombs during World War II (the Manhattan Project), gave a detailed description of the "Fat Man" plutonium bomb, and of several processes for purifying plutonium, to Soviet intelligence.

~ Description from Wikipedia