Starting off a kilometre high, travelling at the speed of a jet aircraft, and heading for us. It doesn't make for a good outcome. Hollywood-style graphics and real-life archive bring home an imagined near-future scenario, all based on cutting-edge science.  —Trevor

This one-hour documentary film tells the story of "Storm of the Century: The Blizzard of '49" - the worst series of storms in Wyoming's history. But for all the tragedy and loss, suffering and death, there was also hope and heroism, unselfish sacrifice and generosity. The blizzard brought out the best in people. Wyoming citizens from all walks of life cooperated together and demonstrated exceptional ingenuity in the face of dire circumstances. There were extraordinary acts of kindness, with people generously giving their time and resources. The public worked together to overcome seemingly insurmountable obstacles and ultimately won in the end.

The Filomena snowstorm in central Spain was undoubtedly exceptional. Its return period in many places exceeded half a century, particularly in Madrid. Despite accurate weather forecasts, Filomena brought roads, public transport, health centers, and other basic services in Madrid to a standstill. What went wrong in the management of this weather event?

An account of the devastating 1906 San Francisco earthquake and the subsequent effort to rebuild.

A look at the state of the global environment including visionary and practical solutions for restoring the planet's ecosystems. Featuring ongoing dialogues of experts from all over the world, including former Soviet Prime Minister Mikhail Gorbachev, renowned scientist Stephen Hawking, former head of the CIA R. James Woolse

This astounding documentary delves into the mysteries of the Tunguska event – one of the largest cosmic disasters in the history of civilisation. At 7.15 am, on 30th June 1908, a giant fireball, as bright the sun, exploded in the sky over Tunguska in central Siberia. Its force was equivalent to twenty million tonnes of TNT, and a thousand times greater than that of the atomic bomb dropped on Hiroshima in 1945. An estimated sixty million trees were felled over an area of over two thousand square kilometres - an area over half the size of Rhode Island. If the explosion had occurred over London or Paris, hundreds of thousands of people would have been killed.

February 2010. On a remote island in the Pacific Ocean called Juan Fernández, everyone slept in town. But a 12-year-old girl felt a tremor and warned of imminent danger.

Depicts assorted natural and human disasters, including the crash of the Hindenburg (1937), earthquakes in Alaska (1964) and Long Beach (1933), the LeMans auto racing crash at which 82 people were killed (1955), Hurrican Camille (1964), the eruption of the Mt. Etna volcano (1971), a tornado (1974), the collapse of Idaho's Teton Dam (1976), the sinking of the Andrea Doria (1956) and the Texas City explosion which devastated Galveston (1947).

It was one of the greatest natural disasters of all time. On the morning of Boxing Day 2004, a massive tsunami hit the coast of the Indian Ocean. More than 230,000 people died, including many holidaymakers from Germany and France. On the occasion of the 20th anniversary, survivors tell their stories. How has the disaster affected their lives to this day?