Horizon - 2008-2009 - Cannabis: The Evil Weed?

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? Addiction specialist Dr John Marsden discovers that modern science is finally beginning to find answers to these questions. John traces the cannabis plants' birthplace in Kazakhstan; finds the origins of our sensitivity to cannabis in the simple sea squirt; and shows just what it does to our brains. He meets people who have been changed by this drug in drastically different ways - from those whose lives have been shattered to those who lives have been revived.


  • 2009-02-03 21:00:00 - 2009-02-03 22:00:00 on BBC Two Wales, BBC Two Scotland, BBC Two Northern Ireland Analogue, BBC Two Northern Ireland, BBC Two England, BBC Two Wales Analogue,
  • 2009-02-14 01:15:00 - 2009-02-14 02:15:00 on BBC One Northern Ireland, BBC One Cambridge, BBC One Channel Islands, BBC One East, BBC One East Midlands, BBC One East Yorkshire, BBC One Yorkshire, BBC One West Midlands, BBC One West, BBC One South West, BBC One South East, BBC One London, BBC One Scotland, BBC One Oxford, BBC One North West, BBC One North East, BBC One South,


  • Presenter John Marsden
  • Presenter John Marsden

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