While in jail, Jack Unterweger's writing made him a celeb. Hailed as a model for rehab, he was granted parole but soon went back to strangling prostitutes. S1/Ep4
A loner and a misfit, Dennis Rader was not a stereotypical serial killer. He called himself BTK in honour of his murder method - bind, torture, kill. S1/Ep2
After a nationwide search, the mutilated bodies of seven backpackers were recovered in the Australian outback. What drove the murderous rampage of Ivan Milat? S1/Ep5
The vicious murders of five prostitutes near Ipswich saw the largest manhunt since the Yorkshire Ripper case. How was the killer eventually brought to justice? S2/Ep8
The Ripper case was dominated by hoaxes, haunting accusations of police incompetence and brutal murders. But how was Peter Sutcliffe finally brought to justice? S2/Ep2
Nilsen committed 15 grisly murders, blaming his personality disorder. Using interviews with investigating officers and forensic scientists, we examine his crimes. S2/Ep1
Fred and Rosemary West lured vulnerable runaways into their home and murdered them. How did they conceal their crimes for almost 20 years, and what gave them away? S1/Ep1
The vicious murders of five prostitutes near Ipswich saw the largest manhunt since the Yorkshire Ripper case. How was the killer eventually brought to justice? S2/Ep8