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

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.

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.