A Scanner Darkly

Substance D is not known as Death for nothing. It is the most toxic drug ever to find its way onto the streets of LA. It destroys the links between the brain's two hemispheres, causing disorientation and then complete and irreversible brain damage.

The undercover narcotics agent, who calls himself Bob Arctor, is desperate to discover the ultimate supply source. But to find any kind of lead, he has to pose as a user and, inevitably, without realizing what is happening, Arctor is soon as addicted as the junkies he works among...