On the road to 2050, farms are coming to a city near you. Mobile farmland is going straight up in the skyscrapers, and the sky is the limit in the farms of the future. It's all about urban farming, in this episode.
New devices are combining with the human body to change our world. Meet a man who hears in colour, thanks to an antenna implanted in his skull and Joe puts on a powerful headset showcasing brain power.