In the summer of 1924, hundreds of human bones surfaced from Hanover’s Leine River, exposing one of Weimar Germany’s most shocking serial murder cases. Fritz Haarmann, a petty criminal and police informant, was ultimately revealed as the killer of at least 22 young men whose dismembered remains had been dumped in the water. This episode traces the discovery of the bones, the city’s growing panic, and the disturbing double life of the man known as the Butcher of Hanover.