BBC Four HD Monday

Michael Portillo's 1930s Bradshaw's-inspired railway tour of north Wales takes him to Colwyn Bay, Rhyl and Anglesey

Julia Bradbury follows in Alfred Wainwright's footsteps and walks along 22 miles of Swaledale in North Yorkshire, exploring its landscape and history

Rachel Burden traces the stories of the UK's D-Day veterans in Normandy and hears memories of the massive beach invasion and the battles that led to the defeat of Germany

Former diplomats and Nazi party members trace Germany's inevitable progression into war and reveal how a Hollywood film helped inspire Hitler's dreams of empire

The infamous Night of the Long Knives in late June and early July of 1934, when Adolf Hitler ordered a series of political executions on those seen as a threat

The adventurer explores how the Great Plains - 500,000-square miles of treeless grassland - became the setting for some of the Wild West's most dramatic events

Following Cumbria's red squirrels throughout the seasons, revealing the work of some of the many people who ensure they continue to thrive and survive

Michael Portillo's 1930s Bradshaw's-inspired railway tour of north Wales takes him to Colwyn Bay, Rhyl and Anglesey

Julia Bradbury follows in Alfred Wainwright's footsteps and walks along 22 miles of Swaledale in North Yorkshire, exploring its landscape and history

Former diplomats and Nazi party members trace Germany's inevitable progression into war and reveal how a Hollywood film helped inspire Hitler's dreams of empire

The infamous Night of the Long Knives in late June and early July of 1934, when Adolf Hitler ordered a series of political executions on those seen as a threat