The BEST episodes of Ancient Aliens season 4

Every episode of Ancient Aliens season 4, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Ancient Aliens season 4!

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: 4/27/2024Network: HistoryStatus: Continuing
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The Da Vinci Conspiracy
star
7.76
729 votes

#1 - The Da Vinci Conspiracy

Season 4 - Episode 8 - Aired 4/6/2012

Might an examination of Leonardo Da Vinci's masterful paintings, highly technical hand-drawn sketches, and private journals reveal knowledge of otherworldly technology and extraterrestrial beings?

Watch Now:AmazonApple TV
The NASA Connection
star
7.60
647 votes

#2 - The NASA Connection

Season 4 - Episode 5 - Aired 3/9/2012

NASA scientists, former astronauts and secret government files all point to the conclusion that there has been contact with extraterrestrial life in the past. Researchers examine this and other recent scientific evidence that may provide proof of alien contact in both the recent and ancient past.

Watch Now:AmazonApple TV
The Doomsday Prophecies
star
7.57
748 votes

#3 - The Doomsday Prophecies

Season 4 - Episode 2 - Aired 2/17/2012

The Maya created the most sophisticated calendar systems in the ancient world, and according to many scholars their Long Count Calendar will come to an end on December 21, 2012. What does this mean for mankind? Some researchers believe it will usher in the return of Bolon Yokte--a mysterious god associated with creation and war. Could this god actually be an extraterrestrial as some ancient astronaut theorists believe? Other scholars believe the end of the calendar will bring about a series of catastrophic events that may threaten the very existence of mankind. They point to a rare galactic alignment that will coincide with the end of the Mayan calendar as proof of an impending geological catastrophe. If these doomsday prophecies prove to be true, will it mean the end of the world as we know it? Or could it reveal some profound truth about the origins of the human race?

Watch Now:Apple TV
Aliens and Mega-Disasters
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7.55
634 votes

#4 - Aliens and Mega-Disasters

Season 4 - Episode 4 - Aired 3/2/2012

There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters? Or is it possible that celestial beings had a hand in the ancient world's catastrophic disasters?

Watch Now:Apple TV
The Greys
star
7.54
744 votes

#5 - The Greys

Season 4 - Episode 3 - Aired 2/24/2012

Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages and all over the world. Who are they, what planet do they come from, and what do they want?

Watch Now:Apple TV
Aliens and Dinosaurs
star
7.50
667 votes

#6 - Aliens and Dinosaurs

Season 4 - Episode 10 - Aired 5/4/2012

Angkor Wat, Cambodia, is the world’s largest ancient religious temple. Within its megalithic ruins, researches have discovered a depiction of a species of dinosaur – a stegosaurus. But how could the ancients have had knowledge of animals that mainstream science says died out millions of years ago? Why are dinosaurs extinct? Did an alien race of beings kill off the dinosaurs to make room for humankind?

Watch Now:Apple TV
The Mystery of Puma Punku
star
7.49
738 votes

#7 - The Mystery of Puma Punku

Season 4 - Episode 6 - Aired 3/16/2012

At nearly 14,000 years old, the ruins of Puma Punku are the oldest and most baffling on the face of the Earth. No one knows who designed and built this complex of sophisticated inter-locking blocks, and then vanished. Researchers investigate the ruins on-location in Peru and present new computer analyses. Forensic evidence on the ground, together with local myths and legends, suggest this site may have been designed and even once inhabited by a species of extraterrestrials.

Watch Now:Apple TV
The Time Travelers
star
7.47
688 votes

#8 - The Time Travelers

Season 4 - Episode 9 - Aired 4/27/2012

Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers from our future? Scientists explore the theoretical possibility of time travel. How can it be achieved? And what might people from 10,000 years in the future look like?

Watch Now:Apple TV
The Mayan Conspiracy
star
7.47
731 votes

#9 - The Mayan Conspiracy

Season 4 - Episode 1 - Aired 2/17/2012

The Mayan civilization dominated Central America for nearly 2000 years, but by the 9th century A.D., the great Mayan cities were abandoned, and the Mayan people vanished. What could have happened to this advanced culture? Might the Maya have left clues as to how they surpassed other cultures in science, mathematics, time keeping, and most importantly, astronomy? In recent years, hieroglyphs have been decoded to reveal that the Maya were able to accurately predict shifts in the Earth's axis every 26,000 years. Inscriptions on the sarcophagus of their most prominent ruler, King Pakal, tell of a journey to the Milky Way. And a sophisticated calendar foretells of the end of the world in 2012. Most striking is their belief that knowledge was passed to them by otherworldly beings who descended from the sky. Could the ancient Maya have actually conspired with extraterrestrial visitors to plan the future--and even the very end of the world?

Watch Now:Apple TV
Secrets of the Pyramids
star
7.40
224 votes

#10 - Secrets of the Pyramids

Season 4 - Episode 11 - Aired 12/21/2012

For thousands of years, pyramids were the largest structures on Earth. The best known were constructed in Egypt and Central America, but others have been found all around the world, including in China, Africa and Indonesia.

Watch Now:Apple TV
Aliens and Cover-Ups
star
7.40
224 votes

#11 - Aliens and Cover-Ups

Season 4 - Episode 12 - Aired 12/28/2012

In 1980, three young military men were sent into a UK forest to investigate strange lights. They reportedly encountered a spacecraft of unknown origin.

Watch Now:Apple TV
Alien Power Plants
star
7.40
196 votes

#12 - Alien Power Plants

Season 4 - Episode 13 - Aired 1/4/2013

Egyptian hieroglyphs depict the use of light bulbs in tombs and secret chambers. And batteries may have been discovered among artifacts from Mesopotamia. Did the Ancients understand electricity, and if so, how did they discover this technology?

Watch Now:Apple TV
Destination Orion
star
7.30
224 votes

#13 - Destination Orion

Season 4 - Episode 14 - Aired 1/11/2013

Why were ancient civilizations around the world so focused on the Orion constellation? While scientists site many earthly connections, researchers suggest this point in the night sky may have been a so-called Stargate.

Watch Now:Apple TV
Aliens and Bigfoot
star
7.25
733 votes

#14 - Aliens and Bigfoot

Season 4 - Episode 7 - Aired 3/23/2012

People on every continent have claimed to see the footprints of Bigfoot. And ancient myths and legends speak of an ape-like giant stalking the earth. What if, as Ancient Astronaut theorists believe, there is evidence to connect Bigfoot with an alien species that once visited Earth in the distant past?

Watch Now:Apple TV
The Einstein Factor
star
7.20
168 votes

#15 - The Einstein Factor

Season 4 - Episode 15 - Aired 1/18/2013

Was Albert Einstein a genius? Or was he superhuman? Was his genius "of this world," or was it "otherworldly?" Is it possible, as Ancient Astronaut theorists believe, of an extraterrestrial connection to the scientific genius of famous historical figures such as Albert Einstein, Galileo, Archimedes, and Aristotle?

Watch Now:Apple TV