Once dubbed 'the most dangerous man in Britain', Patrick Mackay was responsible for a string of bizarre murders during the 1970s. Was Patrick Mackay born to kill?

During the summer of 1980, Douglas Clark and Carol Bundy carried out a series of shocking murders in Los Angeles, leaving a trail of blood in their wake

In 1979, a violent crime spree rocked the town of Richmond, Virginia. The discovery of a triple murder led police to a local gang of brothers.

When eccentric Hadden Clark was arrested for the murder of a young girl in Maryland, he claimed he was also responsible for other murders. Was Hadden Clark Born to Kill?

In the mid-1970s, Donald Nielson aka the Black Panther committed a string of burglaries, armed robberies and murders in north-east England.

Following the story of the serial killer, Peter Sutcliffe, who between 1975 and 1981 murdered 13 females and became known as The Yorkshire Ripper. But how did he get away with the crimes for so many years and was it nature or nurture that turned this chilled out hard-working man into a serial killer.

In 1970, a California doctor and his young family were executed and dumped in the swimming pool of their hilltop home. The killer believed that he was on a mission from God.

Cary Stayner was arrested following the disappearance of a group of female hikers who went missing in Yosemite National Park in 1999.

During 1976 and early 1977, female students at the University of California in Santa Barbara were terrorised by some lookalike murders, so-called because the victims closely resembled one another. Thor Christiansen struck while they were hitchhiking and desecrated their bodies after murdering them.

Between May 2005 and August 2006, Dale and Jeff Hausner who were later were assisted by Samuel Dieteman, turned drive-by shootings into sport as they kept score as they picked off their victims at random.

The show profiles Wesley Shermantine and Loren Herzog. In 1984, tthe friends took part in a drug-fuelled killing spree that terrorised their rural Californian community for around fifteen years.

The show examines the crimes of sadistic couple Paula Bernardo and Karla Homolka who carried out a series of despicable acts against different young women, including Karla's own sister.