Its cheap, highly addictive and ultra-powerful. "Ice", or crystal methamphetamine, is now more popular than heroin. It plays havoc with the minds and the bodies of addicts, filling emergency wards with dangerous, psychotic patients. But little is known about the long term effects of the drug or even how to treat the addiction. And health services are not prepared for the chaos ice has just started to unleash. This weeks documentary reports on the hidden epidemic. “These are the most out of control, most violent human beings I’ve seen in my whole life and I've been around a long time”, despairs Dr Gordian Fulde, Head of the Emergency Unit at St Vincents hospital. “It makes heroin seem like the good old days.”