Host Steve Cannane meets some diverse teens who are all known for a particular character trait – they are moody. Parents complain about how their perfectly sensible, lovable children turn into volatile, irrational adolescents seemingly overnight. The latest science shows that typical teenage negative moods aren’t only inevitable, but they are especially helpful and beneficial for growing up. However these opportunities also come at a cost. Being a teen is the most vulnerable time in our entire lifespan to develop a mental illness. About a quarter of Australian teens are suffering from mood disorders like depression.