Fridays at 9:00 pm on History

Ancient Aliens background

Ancient Aliens

Season 21 Episode 6: The Top Ten Mysterious Mountains

The next episode of Ancient Aliens explores the top 10 mysterious mountains globally, known for bizarre occurrences, including a Sri Lankan summit believed to be a gateway to other worlds, a Washington volcano tied to a notable UFO sighting, and a New Mexico mesa thought to harbor an alien base, ...

The History Channel

Stream Ancient Aliens Season 21 Episode 6 for Free on The History Channel

Season 21 Episodes:

Episode 1 The Top Ten Extraordinary Discoveries

1. The Top Ten Extraordinary Discoveries

Aired: Feb 7, 2025

Groundbreaking discoveries are set to revolutionize our understanding of huma...

Episode 2 The Top Ten Mysterious Monoliths

2. The Top Ten Mysterious Monoliths

Aired: Feb 14, 2025

The next episode of Ancient Aliens explores the world's most enigmatic monoli...

Episode 3 The Top Ten UFO Crashes

3. The Top Ten UFO Crashes

Aired: Feb 21, 2025

Ten UFO crashes from around the world, including a Pennsylvania woods crash, ...

Episode 4 The Top Ten Unexplained Technologies

4. The Top Ten Unexplained Technologies

Aired: Feb 28, 2025

Ancient Aliens explores the top 10 most astounding and unexplained technologi...

Episode 5 The Top Ten Secret Projects

5. The Top Ten Secret Projects

Aired: Mar 7, 2025

Counting down the top 10 most intriguing and secretive projects that investig...

Episode 6 The Top Ten Mysterious Mountains

6. The Top Ten Mysterious Mountains

Aired: Mar 14, 2025

The next episode of Ancient Aliens explores the top 10 mysterious mountains g...

Episode 7 Mysteries of the Aztecs

7. Mysteries of the Aztecs

Aired: Mar 21, 2025

The Aztecs' meteoric rise and devastating fall may hold the key to uncovering...

Episode 8 The Glowing Orb Phenomenon

8. The Glowing Orb Phenomenon

Aired: Mar 28, 2025

Mysterious glowing orbs are appearing worldwide, exhibiting seemingly impossi...

Episode 9 The Legacy of J. Allen Hynek

9. The Legacy of J. Allen Hynek

Aired: Aug 29, 2025

Dr. J. Allen Hynek, a renowned scientist, made groundbreaking contributions t...

Episode 10 The Volcano Factor

10. The Volcano Factor

Aired: Sep 5, 2025

The mystique of volcanoes has sparked numerous myths and legends, yet surpris...

Episode 11 The Birdman Mystery

11. The Birdman Mystery

Aired: Sep 12, 2025

The next episode explores the enigmatic Birdmen, half-human, half-bird figure...

Watch Now

Streaming in:

Canada
United States

Info about Ancient Aliens

Seasons: 21

Current Status: Currently Airing

Network: History

Production Country: United States

Genres:Sci-Fi, Fantasy, History

Ancient Aliens: Where to Watch Online in United States?

Currently, you have the opportunity to watch "Ancient Aliens" by streaming it on the following platforms: The History Channel or alternatively, you can enjoy it completely free of charge with advertisements on the following platforms: The History Channel. Additionally, viewers have the option to either rent or purchase "Ancient Aliens" on the following digital platforms: AppleTV, Amazon, Fandango at Home.