Hannah Fry visits Iceland to uncover the secrets behind its success. She meets scientists predicting lava flows, sees how geothermal power fuels an algae farm, explores Icelandic DNA and rides horseback through ancient Viking landscapes - all to reveal how a tiny, isolated island, shaped by geological extremes, is thriving against the odds.

Over 70 million people around the world claim Irish heritage. Hannah goes beyond the pubs and parades to discover what it really means to be Irish today.

Hannah decodes the Parthenon's geometry, sails the Aegean with ancient tools, and attends a flour-throwing festival that blends ancient myth with modern identity.

The professor explores countries around the world to find the quirks of history and geography that reveal what makes each place truly unique. Hannah visits South Korea to explore how it became a cultural and technological superpower. She trains with a Taekwondo blackbelt, learns the secrets of kimchi, and dives into the world of pro-gaming.