As the heat bakes the British countryside into crisis, Adam Henson and John Craven meet those on the front line. They include the farmer who is double sewing and trying a new crop; the wildlife champions battling to save chalk streams - some of the most vital but fragile habitats in the world; and the firefighters and scientists contending with the wildfires ravaging swathes of our landscape. John also meets the winemakers who, thanks to the scorching summer, could have a vintage harvest, and finds out how the heatwave has revealed some hidden historic secrets. Lastly, he teams up with Wildlife Trust ambassador and much-loved actress Alison Steadman and wildlife film-maker Hamza Yassin to decide which photographs will grace 2023's Countryfile calendar for Children in Need.