Cannabis is the world's favourite drug, but also one of the least understood. Can cannabis cause schizophrenia? Is it addictive? Can it lead you on to harder drugs? Or is it simply a herb, an undervalued medicine? In this documentary, addiction specialist Dr John Marsden discovers that modern science is finally beginning to find answers to these questions.
Addiction expert Dr John Marsden likes a drink. But his father was an alcoholic and although he has taken the decision to allow himself to enjoy drinking, he is obviously conscious of having inherited his father's genes. Combining his powerful, personal story with his specialist knowledge, Dr Marsden witnesses psychological and neurological experiments, meets cutting edge scientists and undergoes a rigorous medical analysis to discover the effects of drinking on his own health, all in search of the truth about alcohol.