Searching for an Alzheimer's Cure in Colombia

Does the key to curing Alzheimer's lie with a poor extended family in Medellin, Colombia?

• 30 mins

On the road with Hillary Clinton

An on-the-road behind-the-scenes profile of US Secretary of State Hillary Clinton.

• 30 mins

Libyan refugees

The mountain Berbers of Libya fighting for their culture and their lives against Gaddafi.

• 30 mins

Escape from North Korea

Reporting the desperate and dangerous efforts of North Koreans to flee to the South.

• 30 mins

The Mourides of Senegal

Tim Judah reports from Senegal on the growing influence of the Mouride Sufi brotherhood.

• 30 mins

Murder, migration and Mexico

Linda Pressly joins migrants on their perilous journey north through Guatemala and Mexico.

• 30 mins

Takoradi, Ghana's Oil City

A portrait of the sleepy Ghanaian city of Takoradi at the start of an oil boom.

• 30 mins

The Mystery of Dirar Abu Sisi

Gabriel Gatehouse investigates the mysterious disappearance of Dirar Abu Sisi.

• 30 mins

9/11 - Toxic Ash

Investigating the health impact on New York from the collapse of the World Trade Centre.

• 30 mins

Zimbabwe's child migrants

The stories of young children travelling alone from Zimbabwe to South Africa.

• 30 mins

India's Whistleblowers

How local level campaigners against corruption in India face threats and violence.

• 30 mins

Roubles and Radicals in Dagestan

Lucy Ash asks if a billionaire's roubles can help to end Dagestan's bloody insurgency.

• 30 mins

Farming Zimbabwe

Martin Plaut investigates Zimbabwe's agriculture ten years after the farm invasions.

• 30 mins

Exposing Bali's Orphanages

Ed Butler investigates abuse of children and scamming of volunteers by Bali's orphanages.

• 30 mins

China's Migrant Worker Mega-City

Tales of discontent and reform from Guangzhou, China's mega-city of migrants.

• 30 mins

The Graves of Kashmir

Who are the thousands of people discovered in mass graves in Indian Kashmir?

• 30 mins

Frank Wild's last journey

Retracing the route of Antarctic explorer Frank Wild, Shackleton's second-in-command.

• 30 mins

Saving the Brazilian Amazon

Justin Rowlatt investigates Brazilian successes in fighting deforestation.

• 30 mins

What happened to the Kurdish spring?

Gabriel Gatehouse investigates freedom and repression in Kurdish Iraq.

• 28 mins

Canada's prescription drug crisis

Crossing Continents investigates prescription drug abuse among Canada's aboriginal people.

• 28 mins

The Angola 2

Why have two Louisiana prison inmates been held in solitary confinement for 40 years?

• 28 mins

Forced Sterilisation in Uzbekistan

Natalia Antelava uncovers evidence of the involuntary sterilisation of women in Uzbekistan

• 28 mins

The Pink Certificate

Emre Azizlerli investigates how gay men in Turkey are humiliated by the army.

• 28 mins

The Marriage Breakers of Bangladesh

Angus Crawford joins Bangladeshis working to halt the illegal practice of child brides.

• 28 mins

A Death in Honduras

A profile of the People's Funeral Service in Honduras, the most murderous nation on earth.

• 28 mins

Russia's New Energy Frontier

Lucy Ash visits Russia's Arctic where reindeer herders and gas companies compete for land.

• 28 mins

China: Too Old to Get Rich?

Mukul Devichand tells the stories of Shanghai's rapidly ageing population.

• 28 mins

Some Promised Land

Migrants fleeing war or poverty who are risking their lives to reach the European Union.

• 28 mins

China Tweeting

Shanghai-based journalist Duncan Hewitt finds out how microblogging is changing China.

• 28 mins

Spain's White Elephants

Spain is in economic crisis. What can a new, closed airport tell us about what went wrong?

• 28 mins