Sue Perkins continues her journey up the Mekong, south east Asia's greatest river. She reaches Laos, one of the poorest and least developed of the nations the Mekong flows through. Show more

Series in which Kate Humble explores three diverse communities in Kenya, Israel and India. In Kenya, Kate looks at the extraordinary custom of woman-to-woman marriage. Show more

Kate Humble explores three diverse communities in Kenya, Israel and India. In this episode, Kate tries to access the intensely private ultra-Orthodox Haredim in Jerusalem. Show more

Billingsgate trader Roger Barton heads to Mexico City's Central de Abasto, the largest food market on the planet. Unfortunately for him, there's not a single fish in sight. Show more

Sue Perkins continues her epic journey up the Mekong. In Cambodia, animal lover Sue is confronted by the most emotionally challenging and complex world of wildlife trafficking. Show more

Celebrities trace their roots. Internationally-acclaimed director, producer and actor Spike Lee explores his family's slave origins, determined to find out who owned his family. Show more

Actress Brooke Shields sets out to discover which side of her divided and very different family she identifies with. In Paris she uncovers the mysteriously titled Madame Royale. Show more

Actress Susan Sarandon researches her family history, including that of her enigmatic grandmother, Anita Rigali, who disappeared when Susan's mother Leonora was a child. Show more

American actor Matthew Broderick traces his roots, discovering the extent of his grandfather's bravery and attempting to solve a 150-year old mystery. Show more

Series in which celebrities trace their ancestry. Sarah Jessica Parker's coast-to-coast journey reveals that her family's roots are set deep in American history. Show more

Kate Humble lives with shepherds in some of the most extreme environments on earth. In Afghanistan, she meets traditional shepherds in the remote Wakhan Corridor. Show more

Kate Humble lives with shepherds in some of the most extreme environments on earth. In the Peruvian Andes, Kate immerses herself in the everyday life of the alpaca herders. Show more

Kate Humble lives with shepherds in some of the most extreme environments on earth. She visits a sheep station in Australia where animals are raised on an epic scale. Show more

Celebrity genealogy series. In Holland and Germany, Rory Bremner delves into the wartime experiences of the father he didn't know very well. Show more

Billingsgate trader Roger Barton heads to Delhi's Azadpur Mandi, a market so big it provides food for the whole of India. He hopes to make a profit and recover his pride. Show more

Robert Webb returns to his Lincolnshire classroom and visits Paris on a journey to find out more about the poem The Love Song of J Alfred Prufrock and its author, TS Eliot. Show more

Celebrity genealogy series. Fiona Bruce discovers the sad truth behind her great-grandfather's mysterious death, and returns to her family's ancestral home. Show more

Sue Perkins immerses herself in the complex life of Kolkata and sees how it is reinventing itself as a megacity with a reputation for eccentricity, culture and tolerance. Show more

Documentary. Massive rituals bring thousands of people together, from a spectacular ancient battle in Indonesia to a modern ceremony in the desert at Burning Man. Show more

Documentary series. This final episode looks at how rituals adapt in our changing world. How do ancient ceremonies stay relevant and how do they change? Show more