Marcel Theroux investigates the growing national scandal in South Korea of modern-day slaves, many of whom have learning difficulties and worked for years on a remote island chain

40 years ago, sisters Hong and Bo were separated by a brutal war. They've been looking for each other ever since. Watch the moment they meet.

This action-packed, eye-opening episode visits Texas to meet the young children participating in what has been described as the world's most dangerous organised sport: bull-riding

Child preachers in Brazil are attracting large crowds and becoming celebrities, as the country's fast-growing evangelical movement gains religious and political power

Unreported World reveals how some Chinese hospitals use nausea-inducing drugs and electric shock therapy to 'cure' gay people, while gay rights activists are closely monitored by the police

Reporter Morland Sanders meets the aid workers trying to reunite children and parents who are trapped on different sides of the frontline in the brutal civil war in South Sudan

Ade Adepitan investigates unscrupulous agents preying on young footballers in Cameroon who are desperate to make a career playing for teams in Europe or the Middle East

Krishnan Guru-Murthy meets the television journalist in Sicily who's risking his life to expose the Mafia bosses whose tentacles still reach far into almost every aspect of life

Reporter Kiki King investigates Mexico's fast-growing, multi-billion-dollar surrogacy industry

Unreported World meets the brave - and very funny - comics risking their security by satirising Zimbabwe's politicians online

A unique, devastating insight into the last days in the battle between Kurdish fighters and Isis for the Syrian town of Kobani.

In this uplifting episode, reporter Ade Adepitan meets medics in Malawi who perform 15-minute operations that allow blind people to see

Reporter Giles Duley visits a remarkable clinic for victims of acid attacks in Bangladesh, and follows one young victim as she rebuilds her life, and the inspirational team helping her

Unreported World meets the health workers risking their lives to vaccinate children against polio in Pakistan, where the Taliban have issued a decree against vaccination