'Stockwell Strangler' Kenneth Erskine embarked on a killing spree throughout 1986.
Series examing the life and behaviours of murderers. In 2013 Joanna Dennehy pleaded guilty to three murders, and two attempted murders across Peterborough.
Together, John Duffy and David Mulcahy attacked numerous women at railway stations throughout the 1980s.
US serial killer Dennis Rader murdered ten people in Kansas between 1974 and 1991.
Steve Wright, also known as the 'Suffolk Strangler' killed five women across Ipswich in late 2006.
Patrick Mackay was convicted of the murders of eleven people in the 1970s.
'The Man In Black' Peter Moore murderered four men in as many months across Wales in 1995.