The U.K. was a hotspot for human sacrifice about 2,000 years ago, and it apparently went beyond simple ritualistic killings. There was cannibalism as well. What was going on during Britain's Iron Age and what drove its people to commit such barbaric executions? Follow hosts Clive Anderson and Mary-Ann Ochota as they travel from the hill forts of Maiden Castle to a cave in South Gloucestershire to uncover the reasons behind these gruesome rituals, to detail the various methods of murder, and to reveal who these unfortunate victims were. Visit seaside caves, grassy castles, and a Lego Iron Age village as we hunt down evidence of human sacrifice in Britain.

Explore one of Britain's best known but most mysterious sites and consider new theories about why Stonehenge was really built. Ancient Britons made a huge circle using stones that had been dragged 180 miles from Wales 5,000 years ago. Five hundred years later, they introduced the mighty sarsen stones, creating the Stonehenge we know today. All these years later, questions still remain: who built it and why? Is it magical? A religious temple? A celestial clock? Did druids build it? By Merlin? Hosts Clive Anderson and Mary-Ann Ochota are determined to get answers and reveal the hidden secrets of the stones.