Hannah embarks on a journey to investigate her own biological age and examines whether it can really be controlled. On the island of Okinawa in Japan, she meets some of the healthiest old women in the world.

Hannah explores how emotional recognition technology, such as cars that can sense anger and laptops that know if the user is bored, is creeping into people's lives and the consequences.

Hannah explores how AI can be used to write reams of text and potentially convince people of false views, and sits with Eliot Higgins, the creator of online investigative journalism group Bellingcat.

It is the holy grail for limitless clean energy, but nuclear fusion might not come soon enough to avoid the worst of the climate crisis. In France, Hannah Fry goes inside the largest international fusion project ever built.

Hannah travels to Japan to visit a robot cafe run by staff with disability from their homes, explores new prosthetics technology, making use of machine learning, and debates whether AI will be a magic bullet for social inclusion in the future.

The environment is in crisis, but a revolutionary new conservation concept offers hope for the future. From the overgrown Fukushima exclusion zone to the majestic redwood forests of California, Hannah embarks on a journey into the wilderness.