San Francisco Meth Zombies (S04E01)

San Francisco, California, once the heart of the 1960s psychedelic movement, has gained a reputation for its drug issues. In the present day, the city, particularly within the gay community, faces the aftermath of a devastating meth crisis. This situation has been fueled by an Asian cartel that has been flooding San Francisco with potent meth for nearly 25 years, while Mexican cartels are now vying for dominance in the market. Nat Geo takes viewers deep into one of America’s most notorious drug-infested areas, revealing the grim realities of the ongoing drug trade.