Every day 100,000 flights criss-cross the globe with more than 1 million people in the air at any one time. Dallas Campbell and Dr Hannah Fry explore the world of aviation. Ep. 3: 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.

Originally released by PBS, 2017. Streaming video file encoded with permission for digital streaming by Infobase on June 01, 2018.

Introduction— City in the Sky: Part 3 - Arrival (4:06); --Stansted, UK (2:29); -- Derby, UK (5:54); -- Runway Safety Inspection (4:06); -- Bangor Airport (4:05); -- Training for Emergency Landing (4:23); -- Air Traffic Controllers (4:24); -- Paro, Bhutan (4:54); -- Airplane Touchdown (3:05); -- Buhl, Germany (4:18); -- Aircraft Holding (5:21); -- Future Technologies (5:21); .