Luigi Chiatti, the 'Monster of Foligno', was an Italian killer of children whose case in the 1990s shocked the nation.

Zdzislaw Marchwicki, the 'Vampire of Zaglebie', was convicted in one of communist Poland's largest and most controversial serial-murder cases.

Roberto Succo was an Italian killer whose crimes across Italy and France in the 1980s, and his dramatic end, made him a notorious figure.

Karol Kot, the 'Vampire of Krakow', was a Polish teenager whose attacks in the 1960s shocked the nation.

Wolfgang Schmidt, the 'Beast of Beelitz', was a German serial killer convicted of murders in the Brandenburg region in the late 20th century.

Werner Boost was a German serial killer of the 1950s who attacked couples around Dusseldorf, earning a chilling reputation.

Adolf Seefeldt, known as the 'Sandman', was a German serial killer of children active in the early 20th century.

Karl Hopf was a German poisoner of the early 1900s who murdered family members for financial gain in a notorious case.

Nikolai Dzhumagaliev, the Soviet killer known as 'Metal Fang', committed murders in Kazakhstan in a case marked by his striking nickname and escape.

Jeanne Weber, the 'Ogress of the Goutte d'Or', was a French woman linked to the deaths of children in early 1900s Paris in a contested case.

Cayetano Santos Godino, known as 'El Petiso Orejudo', was a child killer in early 1900s Buenos Aires whose case shocked Argentina.

Yoshio Kodaira was a Japanese serial killer active in the chaotic aftermath of the Second World War, exploiting postwar desperation.

Gordon Cummins, the 'Blackout Ripper', murdered women in London during a single week of 1942, exploiting the wartime blackout.

Paul Ogorzow, the 'S-Bahn Murderer', attacked women on Berlin's railway during the wartime blackout, in a case shaped by Nazi-era politics.

Heinrich Pommerenke was a German serial killer of the 1950s whose crimes shocked the postwar nation and led to a landmark trial.

Gianfranco Stevanin, the 'Monster of Terrazzo', was an Italian serial killer convicted of murdering several women in the 1990s.

Catherine and David Birnie committed the Moorhouse murders in Perth in 1986, one of Australia's most notorious cases of a killer couple.

Lydia Sherman, dubbed the 'Queen Poisoner', killed husbands and children with arsenic in 19th-century America for money and convenience.

Anna Marie Hahn, a German immigrant in Cincinnati, poisoned elderly men for money and became the first woman executed in Ohio's electric chair.

William MacDonald, the 'Sydney Mutilator', is often regarded as Australia's first recognised serial killer, active in the early 1960s.