<p>The interrogation of a spymaster. Ursula is questioned as Klaus Fuchs returns to England. Secrets threaten to be spilled and loyalties are tested. The war has ended, and the physicist could have a promising future. But will his past catch up with him? Could British intelligence services be on to him? #thebomb</p>

The interrogation of a spymaster. Ursula is questioned as Klaus Fuchs returns to England. Secrets threaten to be spilled and loyalties are tested. The war has ended, and the physicist could have a promising future. But will his past catch up with him? Could British intelligence services be on to him? #thebomb

S2.7 Critical mass

<p>The spy who changed history. And a great-aunt's double life. In season one of The Bomb, we met the scientist who might have stopped the atomic bomb from ever being built. In season two, we meet the man who stole it. Klaus Fuchs was a brilliant young physicist, and the world’s most dangerous spy. Rosa Ellis finds out how he crossed paths with her great-aunt, and how their partnership changed the course of history.</p>

History

The spy who changed history. And a great-aunt's double life. In season one of The Bomb, we met the scientist who might have stopped the atomic bomb from ever being built. In season two, we meet the man who stole it. Klaus Fuchs was a brilliant young physicist, and the world’s most dangerous spy. Rosa Ellis finds out how he crossed paths with her great-aunt, and how their partnership changed the course of history.

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S2.7 Critical mass

S2.7 Critical mass

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