Professor Ian Hickie has spent decades trying to understand clinical depression. Where does it come from? What role do genes play? And most importantly - what works to release its chokehold? Ian Hickie has spent his career trying to help people at their darkest times. He's a psychiatrist who is particularly passionate about taming the black dog of depression. Depression is not a simple puzzle to solve. Ian has seen how the right medical treatment can lift someone out of even the worst depression; but he has also tried to answer some of the most important questions about clinical depression.