Actor Bill Nighy narrates as cameras follow trains travelling though some of the most scenic landscapes in the world. The stories of these iconic railways are told by those who travel on, work on and live beside them. S04E01 Dunedin Railways, New Zealand May 14, 2021 A trip through New Zealand's scenic South Island on Dunedin Railway's trains - the Inlander and the Seasider. S04E02 Taiwan May 21, 2021 A voyage around the island of Taiwan, starting in the eastern port city of Hualien, stopping at Taroko Gauge and continuing to Yilan Country. S04E03 Norway May 28, 2021 Travelling from Bergen to Oslo, taking in the sights of the extraordinary Norway mountains on a super-fast train that travels to the capital daily. S04E04 Austria June 4, 2021 Austria's railway offers an adventure from Gratz, then the mountains and lake of Zell am Zee, and finally to the engineering marvel of the Alberg tunnel.