Trafficked with Mariana Van Zeller

Mariana meets the craftsmen who make and sell the world's finest counterfeit U.S. dollars.[National Geographic]

Mariana dives into the world of international scamming to understand how it all works.[National Geographic]

Mariana retraces one of the world's most intractable smuggling routes, following cocaine's path around the world, from the Peruvian jungles to the Colombian coastline and to the streets of Miami.[National Geographic]

Mariana uncovers a supply chain of firearms being smuggled into the hands of drug cartels.[National Geographic]

Mariana attempts to understand the vanity, insecurity and greed that drives steroid use.[National Geographic]

Mariana sets out to understand the ugly business of illicit sex in America.

Mariana investigates fentanyl, a contributor to the deadliest drug crisis in U.S. history.[National Geographic]

The black market for tigers.

Mariana tackles the secretive and dangerous black market for tigers and tiger parts.[National Geographic]

Mariana sets out to understand the ugly business of illicit sex in America.[National Geographic]

Mariana explores California's booming weed black market four years after legalization.[National Geographic]

Mariana van Zeller investigates outlaw motorcycle gangs known as 1% clubs.[National Geographic]

Mariana van Zeller investigates black-market plastic surgery.[National Geographic]

Mariana exposes a racist underground movement bent on a violent future.[National Geographic]

Mariana follows a meth pipeline from Mexican cartels to American users.[National Geographic]

Mariana tracks a smuggling route of stolen cars from the U.S. to West Africa.[National Geographic]

Mariana meets the villains behind an exploding online romance scam.[National Geographic]

Mariana investigates a new breed of cocaine trafficker: lady bosses.[National Geographic]

Mariana investigates the criminals destroying the Amazon rainforest.[National Geographic]

Mariana explores the billion-dollar underworld of illegal fishing.[National Geographic]