As recently as the 1960s, the hallucinogen LSD showed promise in treating alcoholism and heroin addiction. But then the moral panic at the Flower Power generation got psychedelics frogmarched into the shadowy company of a suite of illicit drugs. For four decades, research stopped. But now scientists are back at the drawing board, testing to see if psychedelics can put the brakes on certain addictive spirals. In this episode, a man in his mid-50s goes down the rabbit hole, in search of the ghosts of his military past, his long-dead father, and the roots of his troubled relationship with the bottle.