Nick Crane visits a project to build a new seaport for London, before travelling across the channel to Belgium, where he takes a ride on a tram that runs along the country's coastline. Alice Roberts learns how to be a seaside landlady in Margate, and Neil Oliver tells the story of British forces' efforts to stop Hitler's biggest battleships reaching the coast of Kent during the Second World War. Back in Belgium, Mark Horton reveals the city of Bruges's role in the history of brick-making, and Miranda Krestovnikoff goes shrimp-fishing on horseback.