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Mariana investigates the growing popularity of bare-knuckle fighting.

Trafficked With Mariana van Zeller

Mariana embeds with crypto scammers who show her how they make millions.

Mariana journeys into gangland to understand the violence plaguing LA.

Mariana investigates the lucrative black market for private data.

Mariana explores surrogacy's dark side; a babies-for-cash black market.

Mariana explores how MDMA is turning the Netherlands into a narco state.

Mariana investigates how illicit oil is fueling terrorist groups worldwide.

Mariana exposes the dangers of the growing and deadly ghost guns industry.

Mariana goes in search of the elusive chemists who make the world's LSD.

Mariana investigates the illicit trade in human organs.

Mariana van Zeller explores the complex inner-workings of the global underworld, black and informal markets.