Kevin McCloud is passionately optimistic about technology and the future, but Jon Richardson, Phil Wang and Alice Levine aren't so sure. Can Kevin persuade his trio of sceptics to see the light?
Kevin dispatches Jon to the US to explore the latest advances in food. Phil is off to China for a stomach-churning solution to waste. And Alice heads for Japan and an encounter with robots.
Longlife, Work & Clever Robots: Jon checks out advances in prolonging life. Alice reckons robots are getting smarter.
Eco Town, Future Farming, Robot Cemetery: America's most eco-friendly town. A future farm in China. And the place robots go to die.
Food, Waste and Robots: A look at the latest advances in food, waste disposal and robots