E1 - Extreme Wilderness

Aired: February 12, 2019

The wilderness lines that have pushed the frontiers of human endeavour into previously unknown territories, solving a set of complex problems along the way.

E2 - Building Bridges

Aired: February 19, 2019

Since their rise in the 19th Century, railways have been at the forefront of modern engineering and transport, conquering dizzying altitudes, wilderness, seas and cities.

E3 - Into the Blue

Aired: February 26, 2019

Engineering that has overcome some of the greatest mountain ranges to create innovative railways, including a tunnel in the Swiss Alps and a zig-zag railway in Ecuador.

E4 - City Limits

Aired: March 05, 2019

How some of our greatest railways have challenged engineering's finest minds in their efforts to conquer the planet's waterways, including a tunnel beneath the English Channel.

E5 - Full Throttle

Aired: March 12, 2019

A look at the planet's most incredible metropolitan railways, and how they help people solve distinctly urban problems. Including a project to upgrade New York's transit system.

E6 - The Sky's the Limit

Aired: March 19, 2019

The engineering breakthroughs that allow trains to go faster than ever thought possible, including technology that allows trains to navigate the winding mountains of Spain at speed.