The search for Dr Ruja Ignatova takes an unexpected turn when a story emerges alleging she's been murdered. But with with sightings of Dr Ruja still coming in long after her apparent demise, can it be true? We speak to the Bulgarian journalists behind the story and team up with BBC colleagues to investigate the murder theory. It takes us on a trail to a Bulgarian man widely suspected of heading an organised crime organisation. Meanwhile, a trusted former adviser to Dr Ruja disappears, just...

From The Missing Cryptoqueen team.

How mysterious friends in influential places may have helped Ruja stay one step ahead. A massive revelation we only now know, but which Ruja knew years earlier. Who are they? And could they be helping her now? CREDITS Presenter: Jamie Bartlett Producers: Rob Byrne and Georgia Catt Original music and sound design: Phil Channell Original music and vocals: Dessislava Stefanova and the London Bulgarian Choir Studio Engineer: Giles Aspen Series Editor: Philip Sellars Commissioner: Dylan...

The Missing Cryptoqueen is back with episode 11 on October 19th. But in the meantime a taster of another podcast, Burn Wild. A story of two fugitive environmentalists, an eco-terrorist cell and a burning question: How far is too far to go to save the planet? To hear more of Burn Wild, updated each Tuesday, search and subscribe: https://www.bbc.co.uk/sounds/brand/p0cx6tw7

The search for Dr Ruja Ignatova gathers pace, five years after she disappeared. Files leaked from Dubai reveal how Dr Ruja stashed millions in the emirate and struck up a relationship with a mysterious sheikh. Then, a careless selfie leads the podcast to a mansion in an exclusive gated community. As the FBI steps up its search, new information surfaces about Dr Ruja’s disappearance from an unlikely source. Presenter: Jamie Bartlett Producers: Rob Byrne and Georgia Catt Series Producer:...

The Missing Cryptoqueen is back with new episodes from 28 September.

The search for Dr Ruja is back on. A lot has happened since Episode 8.

Coming soon...

The final episode takes an unexpected twist. Presenter: Jamie Bartlett Producer: Georgia Catt Additional Research: Ignatius Bahizi Editor: Philip Sellars Original music and sound design: Phil Channell Original Music and vocals: Dessislava Stefanova and the London Bulgarian Choir

Could Dr Ruja and the missing billions be hidden in plain sight? A number of small leads seem to be pointing to one place. 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 Episode 7 of 8. Released weekly

Episode 7 will be available on Monday 28 October. We can't say too much, except this...

In 2009 Dr Ruja and her father bought a metallurgic factory in Southern Germany. What does this have to do with her disappearance today? Those who knew her at the time tell a strangely familiar story about the impressive businesswoman who came to save their workplace. 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 Episode 6 of 8. Released...

'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...

Jamie and Georgia arrive in Bucharest in the hope of seeing their first OneCoin event: The Miss OneLife 2019 Beauty Pageant. Who else could be there? Presenter: Jamie Bartlett Producer: Georgia Catt Story consultant: Chris Berube 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

In Spring this year, something unexpected happened. On March 6th 2019, Dr Ruja's brother Konstantin was arrested at Los Angeles International Airport and charged with money laundering and fraud in connection with OneCoin. Dr Ruja was also charged in absentia, and US authorities declared OneCoin a fraud. We thought this could be the end of OneCoin, and our search. It wasn't. Why? Presenter: Jamie Bartlett Producer: Georgia Catt Story Consultant: Chris Berube Editor: Philip Sellars...

Not all is as it seems with Dr Ruja's revolutionary cryptocurrency, OneCoin. Presenter: Jamie Bartlett Producer: Georgia Catt Story consultant: Chris Berube Editor: Philip Sellars Original music and sound design: Phil Channell Original music and vocals: Dessislava Stefanova and the London Bulgarian Choir

Dr Ruja promised financial revolution. And then, two years ago, she disappeared. Why?

In 2014, a businesswoman called Dr Ruja Ignatova launched a new cryptocurrency that promised to change money forever. OneCoin, she said, was similar to Bitcoin, only bigger, better and easier to use. Within two years, over 3 million people had joined the OneCoin revolution, and Dr Ruja became rich and famous. But then she suddenly disappeared and hasn’t been seen since. For the last six months, writer and journalist Jamie Bartlett has been on the hunt to find The Missing Cryptoqueen. What he...