Chris Tarrant 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.

Chris Tarrant 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 Tarrant takes a train trip through northern Scandinavia's winter wonderland, visiting the northern reaches of Norway, Sweden, Lapland and Finland. Included is a trip to the North Pole to visit a well-known resident.

From Buenos Aires, Chris Tarrant heads to the Pampas lowlands, where he talks to local gauchos. In Bahia Blanca, four Falklands veterans share their opinion of Britain, before Chris takes in South America's beautiful Patagonia region.

Chris Tarrant heads to the Arctic to explore a railway which 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.