George prepares to unveil his own small-space project, an ambitious, accessible, multi-functional tree house within the Calvert Trust, an outward bound activities centre for families with disabilities, set against the backdrop of the beautiful Kielder Water & Forest park. George meets a couple with big plans to build a theatre in a 1970s caravan. A 19th century shepherd's hut undergoes restoration using super-sized Victorian steam powered machinery. And George meets the man who doesn't have to go far for a pint, as he's built an entire pub in his garden shed.