Criminal psychologist Tim Watson-Munro takes us into the minds of some of Australia's worst crims, from the jailhouse genius able to convince everyone he had gone blind to the "bad, not mad" Ivan Milat. Over 41 years, his experiences have included working with both Hoddle Street killer Julian Knight as well as survivors of the massacre; assessing egotistical fraudster Alan Bond; and working with the "highly intelligent" but "extraordinarily violent" Alphonse Gangitano. He discusses whether killers are born evil, the criminals who are hardest to treat, the escalation of offenders such as Mr Cruel and what drives people to kill together. Plus, he reveals the most haunting memories of his career and names Australia's most evil.