What does it take to get a million people and their luggage off the ground? From building the world's largest passenger plane to taking off in the coldest city on Earth this first edition tells the remarkable story of departures.

Dallas and Hannah discover some of the complex global networks and advanced technology that keep the world's aircraft in the skies. How do pilots find their way at night and how do you control the world's busiest airspace?

Dallas and Hannah conclude the series by looking at how the global air travel system gets planes safely back down to Earth, they also examine some of the future problems the industry faces.