30 Years A Slave: A moving report from South Korea where the police have rescued hundreds of modern-day slaves tricked into working on salt and seaweed farms on a chain of remote islands. Shockingly, many of those rescued have learning disabilities.

Marcel Theroux traveled to the Shinan Islands to investigate the lives of these vulnerable people, some reuniting with families who for years believed they were dead.

This episode was first aired on 20/11/15.

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