This episode takes a steam train ride across the Yorkshire Moors, and follows efforts to protect south Devon's railways from storms. Plus: falcons on Anglesey.

This episode follows the route of the Hogwarts Express to Glenfinnan station, where a piece of railway history is up for sale. A Highlands helicopter ride reveals how climate change is threatening the line, and cameras follow efforts to restore a cherished steam locomotive to the Strathspey Railway.

A steam train ride through the Yorkshire Moors reveals how the Bronte sisters became railway revolutionaries, and artist Leo du Feu takes a Highland journey to Thurso in the footsteps of the Jellicoe Express. Plus, the hero who rescued the crumbling Ribblehead Viaduct.

Following the teams protecting the tracks and the volunteers preserving the steam heritage along some of Britain's most scenic railways.