Ancient Aliens season 21 episode 1
Episode title: The Top Ten Extraordinary Discoveries
Ancient Aliens is counting down ten of history's most astonishing discoveries; breakthroughs that challenge traditional beliefs about human history. From a lost city hidden in the Andes, to mysterious metal spheres that are not of this world and a sunken city that was said to be the home of the gods. Could these discoveries provide proof of extraterrestrial contact?
