Can the remains of a Greek athlete tell us about the world of ancient sports? "The First Olympians" uses forensics, special effects and reconstructions to bring us back in time to the sanctuary of Zeus at Olympia. Find out everything about the sports and lifestyles of athletes in Ancient Greece.

It's the process that powers the Sun, and scientists know that if they could just make nuclear fusion happen here on Earth they could solve all the world's energy problems. Billions of dollars have been spent on trying to make it happen, but now an American scientist claims to have created nuclear fusion simply by bombarding a flask of liquid with sound waves. Many scientists refuse to believe his claims, so Horizon has assembled a team to replicate the experiment. This film reveals the team's findings

The world's oceans claim on average one ship a week, often in mysterious circumstances. With little evidence to go on, investigators usually point at human error or poor maintenance but an alarming series of disappearances and near-sinkings, including world-class vessels with unblemished track records, has prompted the search for a more sinister cause and renewed belief in a maritime myth: the wall of water

Five of the world's top scientists present the revolutionary scientific inventions they believe could stop global warming and prevent worldwide disaster. Ideas include putting a giant glass sunshade in space to deflect a small portion of the sun's rays back into space and the firing ofrockets loaded with tons of sulphur into the stratosphere creating a vast, but very thin sunscreen of sulphur around the earth

How the biggest international forensic operation in history identified the victims of the most devastating natural disaster of recent times.

Michael Palin visits the Potala Palace and the great monasteries of Tashilunpo and Sera, where the traditional Tibetan towns are being replaced by modern Chinese cities, he then accompanies some pilgrims to the holy Namtso Lake.

David Attenborough explores just how far climate change is altering our planet, from drought-stricken rainforest to declining polar bears, from flooded homes to bleached coral. He searches for the evidence that it is our daily activities which are radically changing the climate, leaving the future of Earth largely up to us.

A team of experts try to recreate astounding feats of engineering. Prof Chris Wise and Dr Caroline Baillie attempt to build a replica of the first submarine.

Using newly-released files, concealed by the KGB in Moscow and held in archives for nearly 50 years, the programme exposes the events behind the planning and building of the Auschwitz concentration camp. Professor Gerald Fleming, a researcher into Nazi war crimes and architect Robert van Pelt, investigate these files and reveal evidence which shows how German civilian engineers and Bauhaus-trained architects deliberately colluded with the SS to plan the genocide.

The legend of King Arthur and the Knights of the Round Table is explored, with stops in Ireland, Scotland and Wales.

As the highest water bills ever land on doormats across the UK this April, this film investigates the future of the world's water, and paints a disturbing picture of a world running out of the most basic of life's essentials.

One of two contrasting views on immigration under the slot title 'Unwelcome Britain?'. The other is 'Let 'em all in' Looks at the impact of immigration on social and health services, the economy and British cultural identity. Rod Liddle, takes a critical look at current immigration policy and raises concerns about problems that need addressing in order to prevent growing resentment and anger from many people in the country.

In 1992 the nuclear industry celebrated its 50th anniversary and the report on the accident at Chernobyl claimed there was no evidence of long term health effects. Within months, a team of western scientists presented a very different picture with evidence of an epidemic of thyroid cancers in local children.