Tony Robinson heads to Jersey to investigate the origins of Mont Orgueil Castle. Today's castle is a Tudor structure built on earlier foundations, and it's that early castle, built by King John, that the Team are looking for.  Mont Orgueil in Jersey is a well known fortification that has history stemming back to the 12th Century. The Time Team's job is to unravel where the series of 17th Century extensions absorbed the original medieval construction, and what the castle originally looked like in the time of the Normans.