Time Team: The Lost Castle of Dundrum

Tony Robinson and the team search for the remains of a Norman castle in Dundrum, Co Down, one of Northern Ireland's most picturesque counties, exploring a territory established by renegade knight John de Courcy in the 12th century against the orders of King John. The castle was later rebuilt, and much of its replacement is still standing, but the experts are convinced that some of what remains dates from de Courcy's time - and discover that it may go back even further