Trailer: Season 1

Throughout human history, cities have grappled with how to keep excrement separate from drinking water. In the Middle Ages, gong farmers excavated human waste from city dwellers and took it to the countryside to be used as fertilizer. In the 19th century, cities grew so big, this ...  Show more

Just how hard is it to keep wastewater out of our drinking water? Super hard. In this episode, we take a look at the lengths one great American city, Chicago, went to in order to keep the source of its drinking water clean. Reverse the flow of the river? Why not? Then we explore ...  Show more

Exploring the multi-layered story about humanity's first contact with an alien civilization 

A Cold War mystery, featuring the CIA, Howard Hughes, a sunken Soviet sub and quite possibly a sunken American sub too. With cover stories inside cover stories and weak government explanations for obvious questions, this one is a puzzle wrapped in an enigma zip-locked inside a my ...  Show more

History is full of stories we think we know. They are old and dark, but time has robbed us of perspective and clarity. They've become obscured and misunderstood. Which is why this series exists: to dig deep and shed light on some of history’s darkest moments. To help us better un ...  Show more

Hannah Fry explores two tales of data and discovery.Two couples are brought together by a tragedy and a tatty piece of paper, which reveals a serial murderer hiding in plain sight. And, across the world in Singapore, a metro system is misbehaving wildly. The rail engineers and co ...  Show more