Roo Irvine heads to an antiques fair in Detling in Kent. With help from experts Irita Marriott and Nick Hall, the teams hunt for bargains to sell at auction. Meanwhile, Roo takes a look back at the history of crime and punishment.

Danny Sebastian finds out the engineering genius behind Britain's longest and steepest set of staircase canal locks in Northamptonshire, while the teams hunt for bargains.