As the prospect of legalisation and clinical trials looms in several states, Insight also asks whether legal marijuana will lead to an increase of recreational use – and just what will happen to the black market. Is medicinal marijuana doing good or harm?

Desperate Australians are turning to controversial, unproven stem cell treatments for a whole range of illnesses. They say they're tired of waiting for the long process of clinical trials to conclude, while they get sicker and sicker. This week, Insight asks whether current stem cell treatments are cause for hope – or just misleading hype.