On the Isle of Wight, Nick Crane discovers a tunnel in the cliff. Sarah Beynon examines dung beetles in cow pats on Ramsey Island and sees Chuffs feeding on them. Up in Yorkshire, Nick Crane examines the receding cliffs and sees a massive WWII defensive structure now lying on the beach. He visits Aldeburgh, which is under threat from the sea, where many houses have already been condemned due to sea erosion. At Lyme Regis, Cassie Newland examines old rubbish revealed from the old dump.