PBS America TV Guide

Maiya May explores heat in Portland, Oregon, and Medellín, Colombia, a city that is leading the revolution against sweltering city temperatures before visiting the hottest city in the US, Phoenix, Arizona

A network of tunnels built by George IV underneath Brighton's Royal Pavilion as he had grown so fat that he was embarrassed by his appearance and wanted to visit his beloved horses unobserved by cruel critics. Plus, the story behind the Diana, Princess of Wales statue in Kensington Palace and how this piece of art ended up demonstrating the fractured relationship of her two sons

Professor Robert Bartlett examines the impact of the conquest of Britain and Ireland, and learns how William the Conqueror built scores of castles and cathedrals to impose his control and intimidate the population. The ruler also commissioned the Domesday Book to survey the wealth of the land and raise revenue, and set in motion the linguistic and cultural transformation of England. The Normans blended well in Scotland, but faced fierce opposition in Wales, and promoted divisions in Ireland which some claim still exist to this day

Part two of two. Weaving together the epic of Franklin Roosevelt's leadership in the Second World War with the tangled stories of the women who sustained him in his last years, historian David Reynolds explores how the President was racing to shape the future before his past caught up with him

Veteran pilot Rod Snider reflects on the day he and 19 other elite smokejumper firefighters parachuted into the Idaho wilderness to tackle what seemed to be a routine wildfire burning on a mountain ridge that turned into a deadly inferno thanks to fierce winds