Katty Kay in Washington and Christian Fraser in London report on the events that are shaping the world.

Francesco da Mosto reaches Istanbul, the final stop of his marathon voyage, where he explores the Palace of Topkapi, huge underground cisterns and the Grand Bazaar. Show more

How the landscapes of America's three great mountain ranges - the Appalachians, the Rockies and the Sierra Nevada - challenged the westward push of the early pioneers. Show more

Documentary series in which Ian Hislop explores the British trait of obsession with the past. Here he examines King Arthur and King Alfred. Show more

Documentary about the Strangeways Prison riot in Manchester, April 1990, featuring candid and revealing interviews with the former prison governor, inmates and staff. Show more

Examining the first half of Queen Victoria's life, biographer AN Wilson goes in search of a monarch too often misunderstood. Show more

Neil Oliver investigates Britain's deadliest rail disaster at Quintinshill near Gretna Green. Two men were jailed, but was there a cover-up to protect others from being blamed? Show more

Writer and hip-hop artist Akala investigates the mysterious origins of Homer's Odyssey, travelling the Mediterranean to understand the work before writing his own response. Show more

Documentary series. In Arnhem Land, Northern Australia, a family works to create a 'yidaki' - an ancient and sacred Aboriginal instrument also known as a didgeridoo. Show more

Documentary. A remarkable travel guide compiled from first-hand records of Tudor seafarers in the 16th century. Show more

How the landscapes of America's three great mountain ranges - the Appalachians, the Rockies and the Sierra Nevada - challenged the westward push of the early pioneers. Show more