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National Geographic

Mariana launches an investigation into a complex scam that targets seniors, tricking them into becoming drug mules.

Trafficked: Underworlds With Mariana van Zeller

The Drug Mule Scam

Mariana goes inside the dangerous, high-stakes world of illegal gambling to try and understand its allure, its growth and its dark side.

Illegal Gambling

Mariana tracks the illicit path of hashish from Morocco into Europe; a world of shadowy dealers, fast smuggling boats and endless wealth.

Hash Smugglers

Mariana heads to Mexico to investigate the billion-dollar business of people-smuggling to the U.S., a system fueled by cartels and corruption.

Migrant Smugglers

Mariana heads to the Congo to investigate the illegal trading of wild apes that has apes on the brink of extinction.

Apes

Health care costs have pushed millions of Americans to the black market.

Black Market Meds

The trafficking of human remains yields billions of dollars globally and remains clandestine; Mariana's investigation reveals the vulnerability of anyone to human remains trafficking.

Body Parts

Mariana delves into a new scheme called sextortion, where compromising photos are used to extort victims; while searching for the scammer who targeted a young American, she uncovers a scam culture even more terrifying than she had imagined.

Sextortion

Mariana goes inside the world of contract killers.

Assassins

Mariana's investigation into how gold mining is funding terrorism gets interrupted by a military coup that strands the team in Niger.

Caught in an African Coup

Award-winning journalist Mariana van Zeller investigates new emerging underworlds, including the trade in body parts, hired assassins, sextortion and the smuggling of people across the U.S.-Mexico border, to meet the players and learn the business.

S1 E4 | Black Market Meds

E9 | The Drug Mule Scam

E8 | Illegal Gambling

E7 | Hash Smugglers

E6 | Migrant Smugglers

E5 | Apes

E4 | Black Market Meds

E3 | Body Parts

E2 | Sextortion

E1 | Assassins

Caught in an African Coup