This refreshingly frank and impartial study of the discovery and development of the notorious hallucinogenic drug is notably free of moral judgmental, and features contributions from such legendary heroes of psychedelia as Albert Hoffman - the Swiss scientist who discovered the drug - Aldous Huxley - author of 'The Doors of Perception' - Ken Kesey - author of 'One Flew Over the Cuckoo's Nest.

• Documentary