City In The Sky

Ep 1/3

Sunday 5 June



At any one time there are a million people airborne somewhere in the world. It’s a city in the sky. A city that straddles not just countries, but continents - and it’s made up of the 100,000 flights that criss-cross the world daily. So what does it take to run a ‘city’ at 30,000 feet?

In this new series, science broadcaster Dallas Campbell and mathematician Dr Hannah Fry set off around the world to uncover the invisible global networks and complex logistics that make it all possible, and discover the extraordinary engineering and technology that keep this city aloft.

This city is predicted to double in size in the next two decades, and keeping it airborne is testing our ingenuity to its absolute limits.

At some of the biggest, busiest, coldest and most remote airports in the world, they meet the people who keep it all running, uncovering a fascinating world that has transformed the way we live in the 21st century.

In this first episode Dallas and Hannah find out just what it takes to get a million people and their luggage off the ground and up in the air: from building the world’s biggest passenger plane to navigating through the busiest airport on the planet, to the difficulty of getting airborne in the coldest city on earth - Dallas and Hannah go to extremes to get under the skin of the remarkable story of departure.