This episode explores the medieval legend of the Green Children of Woolpit, two mysterious children who reportedly appeared in 12th-century England with green-tinted skin, unknown clothing, and speaking an unrecognizable language. They refused all food until given raw broad beans, and over time learned English.

The boy died young, but the girl grew to adulthood and claimed they came from a place called St. Martin’s Land — a world of perpetual twilight, where people lived underground or in dim light. She said they followed the sound of bells into a cave or tunnel, and emerged in Woolpit.

Theories range from malnourished immigrant children, to fairy folk, subterranean humans, or even interdimensional travelers. With accounts recorded by respected chroniclers of the time, the story remains one of history’s most haunting unexplained encounters.