Ancient Aliens · Season 21, Episode 5
Ancient Aliens Season 21 Episode 5: The Top Ten Secret Projects
About Ancient Aliens: Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in th
More from Season 21
Season 21, Episode 1: The Top Ten Extraordinary Discoveries Season 21, Episode 2: The Top Ten Mysterious Monoliths Season 21, Episode 3: The Top Ten UFO Crashes Season 21, Episode 4: The Top Ten Unexplained Technologies Season 21, Episode 6: The Top Ten Mysterious Mountains Season 21, Episode 7: Mysteries of the Aztecs Season 21, Episode 8: The Glowing Orb Phenomenon Season 21, Episode 9: The Legacy Of J. Allen Hynek Season 21, Episode 10: The Volcano Factor Season 21, Episode 11: The Birdman Mystery Season 21, Episode 12: The Abduction Files Season 21, Episode 13: The Giants Season 21, Episode 14: Aliens In Our Midst Season 21, Episode 15: Britain's UFO Files Season 21, Episode 16: Mysteries Of The Norse Gods Season 21, Episode 17: Secrets Of Japan