The first part of this incredible true story of a Houston criminal who specialized in robbing armoured trucks and murdering the guards, and how he was stopped.
A look at the leading theories behind the rise and fall of serial killings in America, which rose during the 60s and 70s and peaked in the 80s before declining again.
An interview with world renowned Jack the Ripper expert Richard Jones about the famous case and his Jack the Ripper London terror walks, following the killer's footsteps around the city.