
Examining some of the most dangerous and prolific murderers in the UK and worldwide.

Colin Ireland targets patrons of a gay pub in Earl's Court, London.

Scottish serial killer Robert Black attacks four young girls between 1981 and 1986; he is sentenced to life imprisonment at HMP Maghaberry with a minimum sentence of 35 years and is linked to 13 other child murders.

Four vicious murders put Mark Hobson at the center of a nationwide manhunt. Criminologists and psychologists try to decode this enigma.

Lee Ford kills his wife and four stepchildren in a cold-blooded murder spree over 24 hours in September 2000.