Counting down the world's top 10 mysterious devices, from strange, grooved disks found in a cave in China to an ancient Greek computer to an incredible crystal skull unearthed in Mexico.
Director:

Jon Levy
Cast:

Robert Clotworthy

Giorgio Tsoukalos

Erich von Däniken

David Childress

William Henry

Linda Moulton Howe

David Wilcock

Jonathan Young

Jason Martell