Enhanced episodes of "Drugs, Inc." provide a comprehensive look at society's most abused drugs: cocaine, methamphetamine, heroin and marijuana.

How ketamine became the drug of choice for a new generation.

The clear and present danger of meth, crack and heroin on the streets of San Francisco; enhanced.

Cocaine and marijuana dominate a drug-fueled, 24-hour lifestyle for Londoners, who work hard and play even harder; enhanced.

Enhanced episodes of "Drugs, Inc." provide a comprehensive look at society's most abused drugs: cocaine, methamphetamine, heroin and marijuana.