Anoosheh Ashoori was visiting Iran when he was snatched off the street by security forces. He was falsely accused of espionage, and spent years in one of the country's toughest prisons.

For a long time, he didn't know why he'd been targeted. Anoosheh was a British-Iranian dual national, but he'd worked a career as an engineer, and had no links to intelligence services. Gradually, as his incarceration wore on, he realised he'd become a pawn in a game of global politics.

Presenter: Mobeen Azhar

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