Written by a model from the transcript; not yet reviewed.
This episode details the escalating network of atomic espionage during the later years of World War II and the immediate postwar era. Julius Rosenberg successfully recruits his brother-in-law, David Greenglass, a machinist working on the Manhattan Project at Los Alamos, to pass classified nuclear secrets to Soviet intelligence through various couriers, including Harry Gold. As the war ends and the Soviet Union successfully detonates its own atomic bomb, US counterintelligence ramps up its efforts. The FBI makes a breakthrough by decoding wartime Soviet messages through the Venona Project, eventually leading them to physicist Klaus Fuchs and subsequently to Harry Gold, whose confession cracks open the entire spy ring.
The host sets the stage, explaining the historical backdrop of the Rosenberg case and the Manhattan Project.
Julius Rosenberg attempts to smuggle a proximity fuse out of Emerson Radio, illustrating his growing espionage activities.
Ruth and David devise a covert system to transmit atomic bomb details to Julius and the Soviets.
The mysterious courier, “Goose,” is identified as Harry Gold, a key link in the spy ring.
David grapples with his espionage past while trying to protect his family and navigate post‑war America.
FBI agents decode Venona cables, uncovering the identities of several spies, including Klaus Fuchs and the courier.
The episode wraps up, previewing future investigations into the Rosenberg–Greenglass spy ring and its consequences.
Gathering Los Alamos Intelstory
David Greenglass sits down with his wife Ruth in a New Mexico hotel to recount the layout, personnel, and security details of the top-secret Los Alamos base for Soviet intelligence.
Smuggling a Proximity Fusestory
Julius Rosenberg uses his position as an Army inspector to sneak a classified proximity fuse past security inside a box of groceries on a delivery truck.
The Jell-O Box Cipherstrategy
To verify unknown couriers meeting Ruth Greenglass in Albuquerque, Julius cuts a cardboard Jell-O box in a zigzag pattern for them to match later.
The Soviet Union successfully detonates its first atomic bomb in Kazakhstan, shocking the US government with a device largely copied from the Nagasaki bomb design.
The Venona Project Breakthroughinsight
FBI agent Robert Lampier reviews a newly decoded Soviet radio message from five years prior, revealing that a British scientist at Los Alamos leaked uranium enrichment secrets.
The Map of Santa Festory
An FBI agent searching Harry Gold's bedroom finds a hidden map of Santa Fe behind a chemistry textbook, breaking down Gold's denials and forcing his confession.
“The Soviets know that the bomb is designed like a type of gun, that it fires a plug of uranium at another, larger mass of uranium, triggering a nuclear explosion.”
“The courier who surprised the Green Glasses at their apartment in Albuquerque was not actually named Ben.”
“The FBI has long suspected that the Soviets had informants inside the Manhattan Project.”
“The bomb will help them? Yes. Our government has seen how well it works.”
David Greenglass begins working with his brother-in-law Julius Rosenberg to pass secrets from the Manhattan Project to Soviet intelligence. But after the Russians build a bomb of their own, the FBI races to uncover the Americans who helped them. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
7,670 words · 8 speakers
Speaker names marked are inferred from speaking time and the show’s known hosts — they are not voice-verified.
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