In the Season 3 finale, Chris travels 1800 miles across Scandinavia and Finland in the middle of winter, braving deep snow, sub-zero temperatures and hardly any light. He's on a mission to find out how war, iron ore and a certain Lapland-living, red-suited gentleman inspired the Scandinavians to build an extreme railway network that operates deep into the Arctic Circle 365 days a year.
Chris travels the length of the historic Trans-Caucasus Railway, from the flaming towers of Baku on the shores of the Caspian to the port of Batumi on the Black Sea. He explores this railway built in the days of the Russian Empire in a region that for decades was part of the Soviet Union. He wants to find out how the former republics of Azerbaijan and Georgia, and the railway they now share, are faring today.
Chris travels from Cape Town in South Africa to Victoria Falls in Zimbabwe, following the route of an ambitious railway pioneered by controversial 19th century British Colonialist, Cecil Rhodes. Rhodes made a fortune from diamonds and used it to fund his railway and to extend British rule across Africa, laying the foundations for apartheid in the process.
Chris travels by train across Argentina to the heart of Patagonia. In the heyday of its "Belle Époque," this country boasted one of the largest and finest railways in the world, largely funded and built by the British. As he heads further and further South in his quest to ride the iconic Old Patagonian Express, Chris finds out just how far this once great railway network has fallen.
In the Season 3 premiere, Chris heads to the Arctic to explore a railway that probably should never have been built: the Alaska Railroad. Constructed when the USA's largest state was barely populated, Chris wants to find out how and why it has become such a success. But, traveling at the tail end of winter with few trains, completing his journey to the end of the line in Alaska's frozen interior is not going to be easy.