After years of retirement from political life, Nelson Mandela, the world's most admired statesman, allows cameras into his private world.

The dramatic stories of North Koreans who are risking everything, including torture and execution, to escape the repression and hunger of their homeland and reach safety in the South.

The border between the two Koreas is so heavily guarded that refugees are forced to flee into China, dodging border guards and risking freezing to death crossing the river that divides the two countries. Once in China, they are forced to live secret lives, the women often sold into forced marriages or prostitution, because if discovered, the Chinese authorities will send them back.

This film follows two women who have decided to embark on the next stage of the journey, a desperate attempt to reach South Korea. For May, it involves a four thousand mile journey through the jungles of Laos and Thailand, to claim asylum in Bangkok. For Guem Hee, it means buying a fake passport and risking arrest at any moment. For both women, it is a moving story of leaving their loved ones behind in the biggest gamble of their lives.

Investigative documentary. Willard Foxton, whose father committed suicide after falling for an elaborate con, heads to the US to investigate the fraud and its fallout.

This World examines the shocking phenomenon of Romanian Gypsy children across Europe forced to beg and steal, and the racism and discrimination suffered by the Romani people.

Investigative documentary series. The story of Neda Agha Soltan, an Iranian woman who was shot in Tehran in June 2009, and has been claimed as a martyr for Iran's protest movement.

International investigative documentary series. Justin Rowlatt reports on whether President Obama is on target to keep his climate change promises.

Joseph Stalin is back. Or is he? Reporter John Sweeney travels more than 5000 miles through the old Soviet Union, from Stalin's birthplace in Georgia to a former labour camp in Russia, to find out if one of the twentieth century's most notorious mass-murderers is really being rehabilitated.

Investigative documentary. A year-long look at the lives of three young revolutionaries as their differing visions for the new Egypt collide following 2011's Arab Spring.

Investigative documentary. A look at 2011's tsunami that swamped Japan's Fukushima nuclear plant, making 100,000 people homeless and causing nuclear meltdown and a radiation leak.

Investigative documentary series. Following the lives of three people in rural China as their tiny farming community is transformed by a massive government urbanisation project.

Investigative documentary series. This World explores Interviews before Execution, an extraordinary Saturday night talk show in China which interviews prisoners on death row.

International investigative documentary series. John Sweeney investigates Mormonism, the belief system of Mitt Romney, the potential Republican candidate for the 2012 US election.

This World tells the story of the 2011 massacre in Norway, offering insight into the life and mind of the perpetrator, Anders Breivik, and exposing the hatred that inspired him.

Decades of clerical abuse and cover up have left the Catholic church in Ireland at breaking point. Now Darragh MacIntyre reveals new evidence of a scandal that goes to the very top of the Irish church.

Michael Portillo visits Germany, Europe's economic powerhouse, and debt-stricken Greece. Is this the moment the Eurozone becomes more united, or will it be pulled apart?

Documentary which captures the moment when the Nobel Prize-winning dissident Aung San Suu Kyi took the huge, risky step into everyday politics in Burma.

With days to go before the US presidential election, Andrew Marr assesses Barack Obama's first term in office, talking to those who have worked closely with him in the White House.

Simon Reeve heads to Cuba to find a communist country in the middle of a capitalist revolution and asks if the new economic openness could lead to political liberalisation.

Investigative documentary series. Paul Mason travels to Spain to examine how a once thriving economy became the latest casualty of the Eurozone crisis.