PBS - The Spy who Stole the Atom Bomb (2017)

Newly declassified MI5 files reveal the story of the female spy who stole Britain’s atomic secrets and gave them to the Soviets. In January 1941, Ursula Kuczynski, a Jewish German refugee, arrives in Oxford with her children on a British passport. She settles into the daily life of a housewife, but this woman has a secret – she is a Soviet spy.

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