Kevin McCloud sends three celebrities around the world to take a light-hearted look at some of the planet's biggest issues and the technology that could offer solutions. In the final episode, Jon Richardson travels to America to learn about the latest advances in technology that claim to prolong life, and Phil Wang goes to China to explore how technology is enabling new ways for people to earn a living. Elsewhere in Japan, Alice Levine learns about the robots that are becoming as advanced as humans.

This time, Jon Richardson travels to a town that claims to be America's most eco-friendly, while in Japan, Alice Levine finds out where robots go to die. Elsewhere, Phil Wang heads to a futuristic farm in China.

In the first episode, Phil travels to China to investigate ways to deal with waste, Jon explores the latest advancements in food production in America, and Alice encounters robots in Japan.