A mysterious seller appears with a seemingly endless supply of ancient, precious gems at bargain prices. Collector and dealer Ittai Gradel snaps them up. But then a strange series of events starts to unfold. From his home in rural Denmark, Ittai becomes suspicious about what is happening hundreds of miles away at the heart of the British Museum. Presenter: Katie Razzall Producers: Darin Graham, Ben Henderson and Larissa Kennelly Production Coordinator: Gemma Ashman Mix and sound design: James Beard Composer: Jenny Plant Exec-producer: Joe Kent Investigations Editor: Ed Campbell Series Editor: Matt Willis Commissioning Executive: Tracy Williams Commissioning Editor: Dan Clarke