World's Most Evil Killers säsong 3

A chilling look at the man responsible for the cold-blooded murder of Joanna Yeates, whose disappearance in 2010 dominated news coverage and led to intensive police enquiries in Bristol to find the killer.

Given a life sentence for his horrific crimes, Scottish serial killer Robert Black took the lives of four young girls between 1981 and 1986 and was linked to at least 14 other child murders across Europe.

A look at the brutal murderer dubbed `The Beast of Manchester', who claimed the lives of three teenage girls in the 70s. His crimes began on New Year's Eve 1974, when he stabbed 15-year-old Janet Stewart and buried her in a shallow grave.

A look at the 21-year-old killer who travelled from Germany to brutally take the life of British student Matthew Pyke after developing an obsessive infatuation with his girlfriend.

After a severely dysfunctional upbringing, Colin Ireland began frequenting a gay pub in Earl's Court, London. There, he met his victims, whom he would accompany home before binding them and strangling them to death. Ireland sought fame as a serial killer and became known as the 'Gay Slayer', braz...

After a huge search for the missing Sian O'Callaghan in 2011, police arrest 47-year-old taxi driver Christopher Halliwell, who confesses and takes police to her body, but her murder was just the tip of the iceberg.

Experts try to decode the enigma of Mark Hobson, who walked out on his happy family with no explanation on New Year's Day. Five years later, he went on a murder spree, killing his girlfriend, her sister, and an elderly couple in 2004.