World's Most Evil Killers - Season 1

Documentary profiling Chicago killer John Wayne Gacy, who was well-liked by his local community, until it emerged he had ended the lives of 33 men in the 1970s.

An insight into the crimes of Jeffrey Dahmer, the American serial killer dubbed the `Milwaukee Cannibal' after he raped, murdered and dismembered 17 people between 1978 and 1991.

A profile of Ed Gein, the killer and body-snatcher who came to be known as the `Butcher of Plainfield', and whose story is thought to have inspired Alfred Hitchcock's Psycho.

A profile of Belgian serial killer Marc Dutroux, who was convicted of torturing and sexually abusing six victims, up until his arrest in 1996.

A profile of the German serial killer Joachim Georg Kroll, who hunted and ate parts of his victims, earning him nicknames such as `the Duisburg Man-Eater' and `the Ruhr Cannibal'.

Stuart Hamilton and Liz Yardley investigate the crimes of Fritz Honka, who killed at least four sex-workers in Hamburg in the 1970s, hiding their dismembered bodies around his home.

An insight into the crimes of Thierry Paulin, who attacked, robbed and murdered at least 18 elderly women in France during the 1980s, to fund his extravagant lifestyle.

A profile of Volker Eckert, the German truck driver who used his constant travelling to spread his killing spree across Europe.