Si and Dave uncover 370 years of pub history in a Yorkshire pub believed to have been drunk dry by troops the night before the bloodiest battle of the English Civil War - the Battle of Marston Moor. Dave takes a lesson in battlefield fighting, while Si hears tales of Ripley Castle's famous lady - 'Trooper' Jane. And in York, the Hairy Bikers learn the gruesome history of a pub which once doubled up as a hospital.