How the nuclear bomb shaped world history. The scientists who raced to build weapons, the spies who stole the technology and the superpowers who grappled with deployment.

In Season 3, nuclear war is terrifyingly close. Can the superpowers of the Soviet Union and the USA prevent apocalypse? Nina Khrushcheva and Max Kennedy, relatives of Soviet Premier Nikita Khrushchev and US President John F Kennedy, tell the story of the Cuban Missile Crisis.

Season 2 is about Klaus Fuchs, the brilliant young physicist from a pacifist German family whose spying for Russia changed history.

Season 1 tells the story of Leo Szilard, and the scientist’s discovery of the lethal potential for nuclear weapons in the race to beat Nazi Germany.