Mariana dives into the world of international scamming to understand how it all works.

48 min . 2020-12-02

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

48 min . 2020-12-02

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

48 min . 2020-12-09

Mariana attempts to understand the vanity, insecurity and greed that drives steroid use.

48 min . 2020-12-16

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

48 min . 2020-12-23

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.

48 min . 2020-12-30

Mariana van Zeller tackles the black market for tigers and tiger parts, so secretive and dangerous that few have attempted to uncover its ugly details.

48 min . 2021-01-06

Mariana uncovers a supply chain of firearms being smuggled into the hands of drug cartels.

89 min . 2021-01-13