Dr Chris and Dr Xand meet animal experts around the world. They find out all about gorillas when Clare Balding travels to West Africa to meet Shufai the gorilla. Show more

Dr Chris and Dr Xand meet animal experts around the world. They discover how animal dentists help two creatures with tricky teeth. Show more

Dr Chris and Dr Xand meet animal experts around the world. They learn about moon bears, and Steve Leonard visits a sanctuary for rare Asiatic bears. Show more

Dr Chris and Dr Xand meet animal experts around the world. They find out all about big reptiles, and animal expert Steve Leonard meets Martha the alligator. Show more

Dr Chris and Dr Xand meet animal experts around the world. They find out all about one of the biggest animals on the planet - rhinos. Show more

Dr Chris and Dr Xand meet animal experts around the world. They find out all about some furry and fishy creatures who are having a check-up. Show more

Documentary. Dr Chris van Tulleken investigates Britain's favourite foods to discover the truth about calories and shows how we can all be healthier by eating smarter. Show more

Michael Mosley and the team of doctors are in Chester to test an extraordinary idea, that simply standing up more could transform our health. Show more

Michael Mosley and the team of doctors are in Lancaster to test if trees could help solve the hidden health threat of air pollution. Show more

Alex and Matt are joined by the Outnumbered cast and Lesley Joseph. Plus, how to get a pay rise, sugar vs fat, the nation's recycling, and some of the UK's Chip Shop Heroes. Show more

What's worse for us: sugar or fat? Twin doctors Chris and Xand Van Tulleken go on month-long high-fat and high-sugar diets to find out. Show more

Consumer series. Angela Rippon investigates the dangers of safari holidays, and Joe Crowley checks into a hotel in Malta which has attracted scathing online reviews. Show more

Continuing their journey across the USA in one of the world's largest airships, the scientists explore how the atmosphere changes with altitude. Show more

Dr Chris and Dr Xand return to Store Glacier in Greenland with a team of top experts and explorers to find out more about glaciers and icebergs. Show more

Dr Chris and Dr Xand explore an incredible but dangerous underground world of massive caves and tunnels within Store Glacier. Show more

Dr Chris and Dr Xand are in Greenland to learn about glaciers and icebergs. Chris begins an experiment to investigate the smallest inhabitants of the glacier - mosquitoes. Show more

Dr Chris and Dr Xand are in Greenland to learn about glaciers and icebergs. Chris Packham wants to investigate some icy whirlpools at Store Glacier. Show more

Dr Chris and Dr Xand are in Greenland to learn about glaciers and icebergs. The scientists brave the bears to place sensors to discover how wave movement affects the iceberg. Show more

Dr Chris and Dr Xand are in Greenland to learn about glaciers and icebergs. The scientists and explorers spend their last day at the iceberg. Show more

Dr Chris and Dr Xand are in Greenland to learn about glaciers and icebergs. They leave their camp and head out across the high Arctic seas. Show more