National Geographic Channel

'S4/E3'. In this episode we learn just how many ways there are to embarrass, injure and humiliate yourself while doing flips off a tire or monster truck jumps.

'S4/E4'. In this episode we learn just how many ways there are to embarrass, injure and humiliate yourself while catching people or doing motorbike burnouts.

'S1/E4 - Volcanic Origins'. How did builders harness fire to create structures that defy comprehension?

'S1/E1 - Underground Cities And Secret Chambers'. Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

With unrivalled quality and spectacular imagery, this channel brings you award-winning documentaries from around the world - from wildlife adventure and exploration to natural phenomena and world cultures.

'S5/E5 - Hitler's Final Offensive'. Hitler's final attempt to win the war was a surprise winter attack. What resulted were some of the worst war crimes ever committed against America.

'S1/E7 - How To Start A Revolution'. History is full of revolutions industrial, sexual and political, but how can you avoid creating monsters?

'S1/E4 - Executions'. Joe Crowley and Dr Suzannah Lipscomb investigate executions held in the Tower of London, including the botched beheading of Charles II's son.