Horizon: Britain's Most Dangerous Drug is no longer available. Programmes are available for a limited number of days after broadcast. Why?
A look at how some animals and plants go to extremes to give themselves a chance... (R)
A look at the strategies used by reptiles and amphibians to conquer their shortc... (R)
How mammals dominate the planet through having warm blood and by caring for thei... (R)
A portrait of the lives of black bears in northern Minnesota, with biologist Lyn... (R)
The nature documentary looks at fish as they dominate the planet's waters. (R)
A slow-motion camera captures the unique flight of the marvellous spatuletail hu... (R)
Super slow motion shows a bombardier beetle firing boiling liquid at its enemies... (R)
Unique footage of a killer whale engaging in sneaky behaviour to hunt elephant s... (R)
A look at marine invertebrates, including Humboldt squid, starfish and giant oct... (R)
A look at plants and the ingenious and manipulative ways they counter life's challe...
The consumer tech guys check out the latest gear to eliminate mobile dead spots.
Patrick Moore and Dr Chris Lintott search for the wonders of the winter night skies...
Neil Oliver casts his own bronze sword and explores the site of the 'Welsh Great... (R)
Ellie Harrison goes on a journey around the eastern coast of Northern Ireland.
Professors Iain Stewart and Kathy Sykes look at global warming and the planet's fut...
A flash flood brings destruction to a quiet Shropshire town.
The nature documentary series examines primates.
Three friends, one camera and a road trip.
A force 10 gale threatens to capsize a ferry, leaving 23 people at risk of drowning...