BBC Four HD Monday

The former steeplejack examines the development of castles from early Iron Age forts to secret tunnels used during the Second World War, visiting Warwick and Hadrian's Wall

In Coniston, the explorer enters a retro cycling event on a penny farthing, joins the mountain bikers of Grizedale Forest and enjoys a spot of rock climbing at Dow Crag

Historian Simon Sebag Montefiore describes how the Habsburgs transformed Vienna into a multinational city of music, culture, art and ideas

The return of the documentary, picking up in the immediate aftermath of the Second World War, when the hunt began to capture and convict the highest-ranking Nazis

The team explore the enigmatic world of pulsars and hear the inspiring story of their discoverer, Dame Jocelyn Bell Burnell, direct from the subject herself

Documentary following three scientists who go further than anyone has travelled before onto the Greenland ice sheet to find out how fast the ice is melting

Katy Hessel creates a television history of Claude Monet from the BBC archive, from Richard Armitage's portrayal of the artist to an insight into how Japanese art influenced him

The former steeplejack examines the development of castles from early Iron Age forts to secret tunnels used during the Second World War, visiting Warwick and Hadrian's Wall

In Coniston, the explorer enters a retro cycling event on a penny farthing, joins the mountain bikers of Grizedale Forest and enjoys a spot of rock climbing at Dow Crag

Historian Simon Sebag Montefiore describes how the Habsburgs transformed Vienna into a multinational city of music, culture, art and ideas

The return of the documentary, picking up in the immediate aftermath of the Second World War, when the hunt began to capture and convict the highest-ranking Nazis