In the third episode of Drugs Map of Britain, we investigate Valium addiction in Scotland, where three quarters of drug related deaths involve this type of drug. Millions of the pills- both real and counterfeit- are available to buy on the streets for as little as 20p each. We meet those buying them and witness the devastating effects of addiction for someone like Levi, who’s been taking Valium since he was 13. Has the widely prescribed ‘mother’s little helper’ become Scotland’s silent killer?