Located in the eastern Pacific ocean, thousands of miles from other civilizations, Rapa Nui is home to an enduring mystery: hundreds of giant, stone sculptures called maoi. For centuries, outsiders had no idea how these were built, when, why or -- most importantly -- what happened to make the construction stop. In tonight's episode, Ben, Matt and Noel dive deep into hidden history and the latest research... and just may, finally, find the answers.