Could Dr Ruja and the missing billions be hidden in plain sight? A number of small leads seem to be pointing to one place.

The Missing Cryptoqueen is an eight-part series for BBC Sounds.

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

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