A personal journey into heart of the UK's newest national park - the South Downs.
Available for 28 days
1. Northern Scotland
Griff Rhys Jones explores the wilderness of the north west Highlands of Scotland.
Available for 26 days
David Attenborough explores the wildlife of two deserts in Africa's south west corner.
Available for 29 days
The incredible ways in which animals cope with living in the planet's deserts.
In the Canary Islands the team take control of some of the world's largest telescopes.
Available for 23 days
The rich jungles that nestle within China's rugged south west reaches are revealed.
Click visits 500 Years of Robots at the Science Museum in London.
Available for 11 months
For the wildlife and people living in the Lake District, life is one of continuous change.
Available for 25 days
James May takes a rare and privileged flight 70,000 feet above Earth in a U2 spy plane.
Ellie helps to give Cheddar Gorge its annual clean-up.
1. Sea of Cortez
The marine experts carry out pioneering science on the 20-metre-long sperm whale.
Available for 27 days
A look at the lives of residents and visitors to Blencathra in the Lake District.
In Afghanistan, Kate Humble meets traditional shepherds in the remote Wakhan Corridor.
Available for 21 days
1. Marvellous Motion
Nature's quirkiest movers and shakers, from dancing seaslugs to cartwheeling caterpillars.
2013-2014: 5. Meet The Monkeys
Wildlife cameraman Colin Stafford-Johnson revisits a gang of crested black macaques.
Available for 18 days
2012-2013: 7. The Truth About Meteors: A Horizon Special
Iain Stewart explains what meteorites and asteroids are, and the danger they pose.
Available for 22 days
A Japanese-led team of scientists attempt to shed light on the world of deep sea sharks.
Available for 12 days
This travels to the very depths of the seas, to reveal a spectacular variety of life.
Available for 19 days
Jago Cooper uses scientific and archaeological evidence to examine Easter Island's demise.
Available until Sat 11:30pm
Islands are wildlife sanctuaries, but surviving in isolation comes with extreme challenges
Available for 7 days