S1, E3: The team set out to explore the waters off Britain’s eastern coastline, which are constantly pounded by the raw power of the waves. These are the shallowest waters off Britain’s shores but over the centuries they have been some of our most productive, providing oil and gas as well as fish for our tables. But things are changing in the North Sea and our team discover a sea full of surprises. Frank looks at the newest form of energy in the North Sea, at a wind farm off the Norfolk coast and Tooni examines what effect the wind turbines are having on marine life; Paul uncovers the intriguing history of light vessels among the sandbanks of the Thames Estuary; and Tooni gets to the bottom of a bumper lobster harvest in the port of Bridlington.