Steve Backshall visits the Maldives, a country facing significant climate challenges. He finds these challenges are galvanizing the science community. Liz Bonnin returns to California to investigate some surprising solutions for the onslaught of wildfires. Chris Packham is in Greenland to learn more about the effects of global warming and the rate at which snow and ice are melting in the Arctic.

Gordon Buchanan returns to Brazil and revisits a pioneering project aimed at saving the jaguar and discovers the importance of a healthy ecosystem. Ella Al-Shamahi heads to Cambodia and discovers the reality of our planet's most exploited resource after water: sand. Ade Adepitan returns to Kenya to report on the devastating effect of rising temperatures and failed rains.