Juul was the fastest-growing company in history. Now, they’re a cautionary tale. Based on the book Big Vape: The Incendiary Rise of Juul by TIME Health Correspondent Jamie Ducharme, and directed by R.J. Cutler (Billie Eilish: The World’s a Little Blurry; Belushi), this four-part doc-series unpacks twenty years of Silicon Valley innovation, influence, and insanity to explain the spectacular flameout of the vaping device that almost changed everything.