England relied on the skills of her iron workers centuries before the Industrial Revolution. Tony Robinson and the Team travel to what is now a quiet rural valley in Staffordshire in search of those skills.

It appears that the valley was a mass of furnaces and blacksmiths for centuries. The Team know that the Elizabethans smelted there - but how much further back can they take the story?

They've got just three days to see if they can get back 300 years into the dark days of medieval England.