Matt Baker and Anita Rani are in Northumberland in the beautiful coastal village and ancient English royal kingdom of Bamburgh. Matt is busy in the castle, which covers nine acres, discovering what it takes to safeguard it from the elements, while Anita digs into the secrets of bones dating back to the seventh century. Tom Heap investigates the new trend of escaping the city for the country – but at what cost? And on the farm, Adam goes head to head with his actor neighbour Robert Llewellyn to discover how green machines measure up to traditional diesel.