Ancient Aliens

2010 Series 22 Seasons TV-PG HD
DocumentaryMysterySci‑FiFantasy

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.

Ancient Aliens Season 2 Episode 4: Underground Aliens – Watch Online

Season 2 · Episode 4 ·

Ancient Aliens Season 2 Episode 4: Underground Aliens – Watch Online

Underground Aliens

If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? Could a cave in Ecuador contain metallic books inscribed with secrets of alien technology? Was an ancient underground city in Turkey built with alien help... or as a refuge from an alien attack? Rumors of the U.S. military working alongside aliens in a secret base inside a mesa in New Mexico continue to swirl, Native American legends mention strange inner-Earth beings, and recent archaeological discoveries in the Yucatan may point to an extraterrestrial reality behind.

10 episodes

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Ancient Aliens

Episode 4 of season 2 of Ancient Aliens: “Underground Aliens”. Aired 2010-11-18. Watch it online free on ZapFlix.