A Nottingham couple cement their relationship with an ambitious floating home, while in London George discovers an explosion of global architecture in a tiny one-bedroom flat. In Lincolnshire, family relations are put to the test as two teenage siblings take on the task of building their own mobile homes away from home. Plus, together with master craftsman Will Hardie, George conjures up a magical 30-mile vista in a wall just 20cm thick in their secret garden studio flat.