TV Horizon - Season 46 Episode 2 : Cannabis: The Evil Weed? Horizon - Season 46 Episode 2 : Cannabis: The Evil Weed? 7.516/10 by 32 users 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 finds out 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. Details Casts Posters Images Title Horizon - Season 46 Episode 2 : Cannabis: The Evil Weed? Alternative Titles BBC Horizon First Air Date 1964-02-04 Last Air Date 2024-07-22 Number of Episodes 1169 Number of Seasons 60 Genres Documentary, Networks BBC Two, Casts Plot Keywords , Episodes List Horizon Season 46 :Episode 1 Why Are Thin People Not Fat? Why Are Thin People Not Fat? 2009-01-26 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 2 Cannabis: The Evil Weed? Cannabis: The Evil Weed? 2009-02-03 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 3 Why Do We Dream? Why Do We Dream? 2009-02-10 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 4 Can We Make a Star on Earth? Can We Make a Star on Earth? 2009-02-17 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 5 The Secret Life of Your Bodyclock The Secret Life of Your Bodyclock 2009-02-24 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 6 What's the Problem with Nudity? What's the Problem with Nudity? 2009-03-03 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 7 How to Survive a Disaster How to Survive a Disaster 2009-03-10 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 8 Who Do You Want Your Child to Be? Who Do You Want Your Child to Be? 2009-03-17 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 9 Why Can't We Predict Earthquakes? Why Can't We Predict Earthquakes? 2009-03-24 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 10 Alan and Marcus Go Forth and Multiply Alan and Marcus Go Forth and Multiply 2009-03-31 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 11 How Violent Are You? How Violent Are You? 2009-05-12 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 12 Do I Drink Too Much? Do I Drink Too Much? 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 13 The Secret You The Secret You 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 14 Fix Me Fix Me 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 15 Who's Afraid of a Big Black Hole? Who's Afraid of a Big Black Hole? 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 16 Why Do We Talk? Why Do We Talk? 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 17 How Long is a Piece of String? How Long is a Piece of String? 2009-12-22 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. Horizon Season 46 :Episode 18 How Many People Can Live on Planet Earth? How Many People Can Live on Planet Earth? 2009-12-09 Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.