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.

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.