The Great Battle

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

Yuri Ozerov's epic historical film "The Great Battle" is composed of five films about the events of the WWII.

This fascinating 5-part series unearths the untold story about how the Great War went underground the tales of tunnellers and miners who dug under the enemy when there was no other choice but to attack from beneath. Five legendary battles. Five tales of human sacrifice and tenacity. Five bloody battles that involved men from all over the world. They dug tunnels for victory – into the mud of Flanders, the chalk of Champagne and the granite of the Alps - and many died inglorious deaths. They were the miners of the Great War: coal miners from Yorkshire and quarry men from Verona; salt miners from Salzburg and pioneers from the Black Mountains.

The Great Barrier Reef is in danger - it is now officially declared to be in a very poor state. Yet the battle to save a national icon has sparked furious clashes and opened up deep divides in Australian society. As Australia wrestles with the effects of climate change, Nick Lazaredes meets those who are fighting to preserve the reef and those being blamed for its sudden decline.

An in-depth look at what became the bloodiest battle of the First World War with 11 months of fighting, over two million soldiers mobilised and 300,000 dead.

Severe air pollution is the price of China's rapid economic growth. This programme explores the daunting challenges in a country that nearly 1 million people are said to die from air pollution yearly.