'Who is to blame?' One of the world's highest-earning Multi-Level-Marketers and former OneCoin top seller agrees to speak. In his mansion on the outskirts of Amsterdam, Jamie learns the secret behind OneCoin's rapid growth and the huge amounts of money that has been made by those at the top. Presenter: Jamie Bartlett Producer: Georgia Catt Editor: Philip Sellars Original music and sound design: Phil Channell Original music and vocals: Dessislava Stefanova and the London Bulgarian Choir Written and researched by Jamie Bartlett and Georgia Catt