BBC Four Tuesday

John Higgins v Barry Hawkins. Coverage of the sixth first-round match, held at Alexandra Palace in London

Marine archeologist Jon Henderson tells the story of the Vikings in Scotland, revealing how they helped shape the identity and culture of the nation

Film-maker Karl Taylor and his team investigate what happened to the German submarine UC18 and Royal Navy Q-Ship the Lady Olive

The changing face of the British pub over the past 50 years, from its popularity as a working-class male establishment to its battle for survival against supermarkets

How recently uncovered Soviet whaling reports have allowed us to understand the magnitude of historical whale populations and the impact of commercial whaling

Marine archeologist Jon Henderson tells the story of the Vikings in Scotland, revealing how they helped shape the identity and culture of the nation

Historian Dr Janina Ramirez tells the story of the first book written in English by a woman, which was suppressed for centuries for its controversial theological views