David Dimbleby's architectural tour of Britain heads north to Newcastle, home of George and Robert Stephenson, and then west to Manchester, where Dimbleby finds warehouses based on Venetian palaces and a stunning town hall. He explores the sewers that changed the lives of the Victorian poor, the model village of Saltaire, and the grand merchant houses and shopping arcades of Leeds. He ends his journey in Blackpool, where Victorian engineering was put to the serious business of having fun.