This week on The Sound, we’re sharing a special preview of Spy Valley: An Engineer's Nuclear Betrayal. This new series uncovers Silicon Valley’s origins as a laboratory for espionage.

At the dawn of the hi-tech age, Moscow’s spies opened up shop in San Francisco and Silicon Valley. In this podcast, you’ll get to know the group of FBI spy hunters who assembled to stop them—and solve the case of a lifetime.

Hosted by national security journalist Zach Dorfman, Spy Valley will walk you through a maze of technology theft, double agents, and unbelievable events that put an American engineer at the center of it all.

There are new episodes of Spy Valley out now. To keep listening, search for Spy Valley: An Engineer's Nuclear Betrayal, wherever you get your podcasts.

For more fearless storytelling visit brazen.fm, home to all our podcasts, documentaries and newsletters. At Brazen, we show you how the world really works – from espionage and corruption to deal-making and organised crime, we’ll take you inside stories from hidden worlds.