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City Limits
Impossible Railways - S2 - E4
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.
Impossible Railways: Season 2 - 6 Episode s
2x1 - Extreme Wilderness
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.
2x2 - Building Bridges
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.
2x3 - Into the Blue
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.
2x4 - City Limits
March 5, 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.
2x5 - Full Throttle
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.
2x6 - The Sky's the Limit
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.