The BEST episodes of Ancient Aliens season 15

Every episode of Ancient Aliens season 15, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Ancient Aliens season 15!

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 the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate. Did intelligent beings from outer space visit Earth thousands of years ago?

Last Updated: 12/15/2024Network: HistoryStatus: Continuing
The World Before Time
star
7.70
213 votes

#1 - The World Before Time

Season 15 - Episode 6 - Aired 2/29/2020

Shocking new evidence reveals that advanced civilizations might have existed on Earth tens of thousands of years ago. Is it possible that a technologically advanced society thrived on Earth then’ And did they leave behind a record that they lived alongside extraterrestrial beings’

Watch Now:Amazon
The Mystery of Nan Madol
star
7.69
209 votes

#2 - The Mystery of Nan Madol

Season 15 - Episode 1 - Aired 1/25/2020

Giorgio Tsoukalos and David Childress explore the mysterious chain of manmade islets in Micronesia's Nan Madol; built from 250 million tons of volcanic rock, there are local legends that strange visitors floated the massive rocks through the air.

Watch Now:Amazon
They Came from The Pleiades
star
7.61
181 votes

#3 - They Came from The Pleiades

Season 15 - Episode 7 - Aired 3/7/2020

In numerous ancient cultures throughout the world, stories were told of ancestors that came to Earth from the Pleiades star cluster, but could new scientific findings reveal that humankind's true origins lie not on Earth but 400 light years away.

Watch Now:Amazon
The Relics of Roswell
star
7.60
188 votes

#4 - The Relics of Roswell

Season 15 - Episode 2 - Aired 2/1/2020

In 1947 the U.S. military collected the debris of what they claimed was a crashed weather balloon outside of Roswell, New Mexico. But new evidence may prove the conspiracy theorists right--that the wreckage actually belonged to an extraterrestrial spacecraft. If true, could remnants of it still exist that the recovery teams overlooked?

Watch Now:Amazon
Aliens and the Presidents
star
7.59
167 votes

#5 - Aliens and the Presidents

Season 15 - Episode 12 - Aired 4/18/2020

The White House has consistently denied having any knowledge of alien craft visiting Earth, but presidential encounters with UFOs and other strange phenomena can be found going all the way back to George Washington.

Watch Now:Amazon
Destination Chile
star
7.54
190 votes

#6 - Destination Chile

Season 15 - Episode 3 - Aired 2/8/2020

The Chilean government questions whether new footage from a Navy helicopter indicates a connection to geoglyphs in the Atacama Desert.

The Mystery of the Stone Giants
star
7.51
174 votes

#7 - The Mystery of the Stone Giants

Season 15 - Episode 5 - Aired 2/22/2020

From Egypt to Easter Island, towering figures built by ancient man stand watch over the Earth. Are these stone giants simply a testament to humanity's past or could they depict visitors from another world' And do they serve a technological purpose that modern man is just now unlocking'

The Real Men in Black
star
7.50
183 votes

#8 - The Real Men in Black

Season 15 - Episode 4 - Aired 2/15/2020

An investigation into the rumors that the U.S. government is working covertly with space aliens to create alien-human hybrids.

The Ultimate Guide to UFOs
star
7.49
158 votes

#9 - The Ultimate Guide to UFOs

Season 15 - Episode 11 - Aired 4/11/2020

UFO witnesses have reported a wide variety of objects in Earth's skies, and not only in modern times, but for centuries. What might we learn from examining their shapes, sizes, and the way they maneuver. Could they offer important clues about other intelligent life in our galaxy.

The Immortality Machine
star
7.46
183 votes

#10 - The Immortality Machine

Season 15 - Episode 8 - Aired 3/14/2020

In the Mojave Desert, there is a structure built to bestow everlasting life and according to the architect, the blueprint was provided by an extraterrestrial visitor known as the Integratron, could it actually provide the key to immortality.

The Mystery of Skinwalker Ranch
star
7.33
166 votes

#11 - The Mystery of Skinwalker Ranch

Season 15 - Episode 10 - Aired 3/28/2020

Nestled within a remote valley in Utah, is a ranch that some believe is a hotbed of strange, inexplicable phenomena including terrifying creatures, paranormal apparitions and lights in the sky. Could the bizarre activity have a connection to an alien entity known as the Skinwalker'

The Shapeshifters
star
7.27
154 votes

#12 - The Shapeshifters

Season 15 - Episode 9 - Aired 3/21/2020

Accounts of creatures that can shape shift from one form into another can be found, but could similarities between the ancient stories and modern-day alien abduction accounts reveal that shape shifters are real and have come to Earth.