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 gentlemen inspired the Scandinavians to build an extreme railway network that operates deep into the Arctic Circle 365 days a year.

Documentary series in which Chris Tarrant explores the world's most extreme railway lines. Chris travels on the historically Soviet Trans-Caucasus Railway, beginning in the Azerbaijani city of Baku before exploring the Geogian capital Tbilisi's vintage metro system, then a mountain rail bridge designed by Eiffel, and finally a tunnel reputed to be held together with egg yolk.

Documentary series in which Chris Tarrant explores the world's most extreme railway lines. Chris travels 1500 miles from Cape Town in South Africa across Botswana to the Victoria Falls in Zimbabwe, following the route of a mind-bogglingly ambitious railway pioneered by controversial 19th century British Colonialist, Cecil Rhodes.

Chris talks to gauchos in the Pampas lowlands, meets Falklands veterans in Bahia Blanca, and takes in the beauty of Patagonia.

Chris heads to the Arctic to explore the Alaska Railroad.