Overview: The Suffolk Strangler. Steve Wright brutally killed five women over a six-week period in 2006. He is unquestionably one of Britain's Most Evil Killers.
Overview: The Yorkshire Ripper. Examining some of the UK's most prolific killers. Peter Sutcliffe's five-year killing spree claimed 13 victims.
Overview: Ian Huntley murdered two 10-year-old schoolgirls in a case that shocked the nation and changed the course of British policing.
Overview: Between them, Fred and Rose West killed at least 12 girls over two decades in Gloucestershire. What fuelled their appetite for murder?
Overview: Levi Bellfield was already in prison for killing two women when he was found guilty of murdering schoolgirl Milly Dowler in 2002.
Overview: The first woman in British history to be given a whole life sentence, Joanne Dennehy's 2013 rampage saw her murder three men and attack two more.
Overview: The Crossbow Cannibal: A chilling look at Stephen Griffiths, who in 2009 viciously murdered three women - one in blatant view of a CCTV camera.
Overview: A look at the north London serial killer Dennis Nilsen, who murdered at least 12 men before being caught when he began flushing remains down the toilet.
Overview: When Tia Sharpe disappeared, Stuart Hazell helped police search for her. But in reality he'd murdered the 12-year-old schoolgirl.
Overview: When Peter Tobin was convicted for raping and murdering a Polish student in 2006, further investigation linked him to two more murders.
Overview: 30 years after the tragedy in Hungerford took place, we recall the events of 19 August 1987 where killer Michael Ryan claimed 16 lives and his own.
Overview: Nurse Beverley Allitt poisoned 13 children under her care, killing four of them, earning her the nickname "The Angel of Death" from the British media.