Mariana dives into the world of international scamming to understand how it all works and meet the outlaws at the heart of this booming industry.

Mariana goes in search of the new bosses, new routes, new risks and the American communities paying the price for fentanyl’s next wave.

Mariana journeys deep inside the Peruvian underworld to meet the gangster craftsmen who make and sell the world’s finest counterfeit U.S. dollars.

Mariana attempts to understand the vanity, insecurity and greed that’s driving the unregulated, billion-dollar black market in body-enhancing drugs.

Mariana embeds with pimps, victims, undercover cops and private investigators to understand the ugly business of illicit sex in America.

Mariana retraces one of the world’s most intractable smuggling routes, following cocaine’s path around the world.

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

Mariana uncovers a supply chain of American firearms being smuggled into the hands of drug cartels, fueling record levels of gun violence in Mexico.