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Ancient Aliens Season 21 episodes
S21 E01
The Top Ten Extraordinary Discoveries
42 mins · Fri, 7 Feb 2025
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?
S21 E02
The Top Ten Mysterious Monoliths
42 mins · Fri, 14 Feb 2025
Ancient Aliens is counting down the world's top ten most mysterious monoliths, from a 500-ton stone believed to represent an ancient UFO, to giant statues said to have been created with advanced technology, and ornate pillars that depict otherworldly visitors. Could these extraordinary standing stones provide evidence of extraterrestrial visitation?
S21 E03
The Top Ten UFO Crashes
42 mins · Fri, 21 Feb 2025
S21 E04
The Top Ten Unexplained Technology
42 mins · Fri, 28 Feb 2025