Season 6 explores all aspects of the illegal trade in heroin, cocaine and other illicit drugs, including the potent super-opiate known as krokodile.

New Year's Eve NYC 44m As New York City counts down to midnight, partying creates spikes in illegal drug use that lead to street violence and strains on police resources.

Mardi Gras 44m A link between Mardi Gras partying and increased drug traffic challenges both the DEA and local law enforcement in New Orleans.

Cocaine White Gold 44m The cocaine that winds up in the hands of Hollywood's red-carpet elite has humble roots as a Peruvian farm crop that's handled by a powerful cartel.

Spring Break 44m Florida's spring break tradition means increased drug use, particularly "molly." A music festival in Miami only adds to law enforcement's problems.

Marijuana Mayhem 44m The demand for California Sour Diesel, a powerful marijuana that produces instant highs, creates violent competition among drug traffickers.

Super Meth 44m Following the money for super meth, the most addictive form of crystal meth around, leads to the Sinaloa Cartel and its extremely violent drug wars.

Hardcore Heroin 44m In Columbus, Ohio, heroin has never been more addictive. Meanwhile, in Mexico, soldiers are risking their lives to stop the cartels that supply it.

Manic Molly 44m The explosive popularity of molly, a rebranding of ultra-pure ecstasy, is causing a tug of war between law enforcement and new-wave drug dealers.

Flesh-Eating Krokodil 44m With origins in Eastern Europe, codeine-derived Krokodil has horrific consequences for users -- and side effects you wouldn't believe.