

7.042 minSeason 22 • Episode 6
LatestFrom a stone circle in Turkey that challenges the timeline of human history to gigantic stone spheres in Bosnia and Egypt’s most unusual tombs, could these monuments provide proof of extraterrestrial visitation?
Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.
Production
Dramatic reenactments that outpace most scripted dramas.
Editing
Every episode uses the same five shots, somehow still compelling.
Trivia, insights & behind the scenes
The 'Aliens' meme and Giorgio Tsoukalos's hair became 2010s internet fixtures, spawning countless parodies that often outreached the show itself.
Erich von Däniken's 1968 book 'Chariots of the Gods?' forms the entire foundation, and he appears frequently despite academic ostracism since the 1970s.