BBC Four HD

An exploration of the attempt to blow up the Houses of Parliament in 1605, one of the most famous yet least understood events in British history. It shows how the plot was almost England's 9/11, and asks why a group of young Englishmen became so radicalised and so hell-bent on...

Skin is the external barrier between animals and the outside world, protecting vertebrates from extremes of temperature, the harmful effect of UV and a host of living organisms that want to get in.

Maureen has arranged a trip the spectacular Brecon Beacons. But it's not the usual walks amid epic mountain scenery on the agenda. In a first for both, the childhood sweethearts enlist in tank school. After donning cam cream and military gear, the couple get a lesson in...

Professor Brian Cox visits a planet that dwarfs all the others: Jupiter. Its enormous size gives it a great power that it has used to manipulate the other planets. Jupiter is not only the biggest but also the oldest planet in the solar system. It alone witnessed the birth of the...

BBC FOUR is the BBC channel for people who want more. More depth, more range, more to stimulate the mind.