The Railway Killers - Episode Guide

The first edition reflects on a city plagued by muggings and sexual assaults, where an under-resourced police force struggled to keep control.

A woman goes missing while on a train home from work, immediately stoking fears that the killers have struck again - fears that prove accurate when her body is discovered. The police painstakingly work through a list of more than 3000 potential suspects with blood that matches the earlier crime scenes - and eventually come across a man whose suspicious behaviour and similarity to the rape victims' descriptions marks him out as a possible perpetrator.

The third and final edition looks back to 1997 when John Duffy, nine years after he had been sentenced to life for murder and rape, finally confesses to police that he had an accomplice, David Mulcahy.