How did a Russian spy end up at the heart of the Manhattan Project? What happened when Soviet intelligence lost track of their own spy? And how did one man hand Stalin the bomb on a silver platter?

Klaus Fuchs was already one of the most valuable spies in history, feeding atomic secrets to the Soviet Union. But when he disappeared in 1944, his handlers feared the worst. In reality, he was about to get even closer to the ultimate prize: the blueprints for the atomic bomb.

This week, Gordon and David uncover how Fuchs embedded himself in Los Alamos, the most classified site on Earth, and carried out one of the greatest intelligence coups of the 20th century.

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Order a signed edition of David's latest book, The Seventh Floor, via this link.

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Email: [email protected]

Twitter: @triclassified

Assistant Producer: Becki Hills

Producer: Callum Hill

Senior Producer: Dom Johnson

Exec Producer: Tony Pastor

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