Ancient Aliens
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.

Season 22 · Episode 7 ·
Underwater Alien Bases
The oceans are the most mysterious places on Earth. Countless legends tell of powerful beings living in the waters, and today they are major hotspots for UFOs. Is it possible that the deepest depths of our planet—are home to otherworldly beings?
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Episode 7 of season 22 of Ancient Aliens: “Underwater Alien Bases”. Aired 2026-06-11. Watch it online free on ZapFlix.