Real monsters are behind our greatest legends. This episode takes us into the belly of the beast to find the surprising truths behind history's most mythic cannibals and killers. Does a banshee born during the Revolutionary War still curse the North Carolina woods? Plus, a medieval clan of cannibals out for blood in 16th century Scotland, and did a fairy tale villain named Bluebeard inspire a notorious Chicago World's Fair serial killer? And, could real zombies walk among us, created by a potion from puffer fish?