World's Most Notorious Killers

Serial Killer Charles Sobhraj, who found his victims along the Hippie Trail in the 1970s, preyed on unsuspecting Western backpackers.

Chris Dawson was not only found guilty of killing his wife Lynette, but of having sex with the 16-year-old student he moved into the family home just days after Lynette disappeared.

Among murderer Marc Dutroux's many horrific crimes, he built a secret dungeon in his basement and held victims as sex slaves. In some cases, he had help from accomplices.

Jack Unterweger was known as a reformed killer and respected crime journalist in Austria until it was discovered that he was reporting on his own horrific acts.

Police thought they were searching for one body at Fred and Rosemary West's home in Gloucester, England — but they'd find many more.

Some of the globe's most infamous killers, including Fred West, Jack Unterweger, and Marc Dutroux, had some help from their romantic partners. 

From bodies buried in a family's yard in England to tourists murdered along the shores of Thailand, a new Peacock series explores international stories of unspeakable horror.

Peacock's latest true crime docuseries travels the globe to reveal the chilling stories of five renowned international murder cases, from killings by England's Fred and Rose West to Australia's Christopher Dawson.