Season 0

10 Episodes

Air Date: 2009-03-08

What if life on Earth began in outer space? Millions of people accept the theory that intelligent life forms visited Earth thousands of years ago and were worshipped as gods by primitive man. Are monuments like Stonehenge and Easter Island the last remains of an ancient alien visitation? From unexplainable super structures, to knowledge of the solar system, mathematics, and even the ability to make electricity, this special explores evidence of super-human influences on ancient man and embarks on an around-the-world search for answers. It's an investigation into a theory some believe cannot be true, but many agree cannot be ignored.

Season 1

5 Episodes

Air Date: 2010-04-20

Season 2

10 Episodes

Air Date: 2010-10-28

Season 3

16 Episodes

Air Date: 2011-07-28

Season 4

10 Episodes

Air Date: 2012-02-17

Season 5

12 Episodes

Air Date: 2012-12-21

ANCIENT ALIENS Season 5 continues to explore the fascinating field of alien research. From cave paintings to firsthand accounts, this inquiry provides grounded historical depth.

Season 6

11 Episodes

Air Date: 2013-09-30

ANCIENT ALIENS Season 6 on H2 continues to explore the fascinating field of alien research. Did intelligent aliens roam the earth thousands of years ago? Were structures created to worship or guide them? Do they walk among us now? From cave paintings to ancient texts and from artifacts to firsthand accounts, this inquiry presents grounded historical depth.

Season 7

8 Episodes

Air Date: 2014-01-24

ANCIENT ALIENS 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 in this hit H2 series 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?

Season 8

8 Episodes

Air Date: 2014-06-13

ANCIENT ALIENS examines 75 million years of the most credible alien evidence here on Earth. From the age of dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the U.S., each episode gives historic depth to the questions, speculations, controversies, firsthand accounts and grounded theories surrounding an age-old debate. Did intelligent life forms from outer space visit Earth thousands of years ago? Do they visit us now?

Season 9

12 Episodes

Air Date: 2014-10-31

ANCIENT ALIENS Season 9 continues to explore theories about what influence aliens may have had on the beginnings of civilization and whether clues are right in front of our eyes.

Season 10

10 Episodes

Air Date: 2015-07-24

ANCIENT ALIENS examines 75 million years of the most credible alien evidence here on Earth. From the age of dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the U.S., each episode gives historic depth to the questions, speculations, controversies, firsthand accounts and grounded theories surrounding an age-old debate. Did intelligent life forms from outer space visit Earth thousands of years ago? Do they visit us now?

Season 11

15 Episodes

Air Date: 2016-05-06

ANCIENT ALIENS returns in its continued global search for proof that extraterrestrial life exists and these unknown lifeforms visited Earth thousands of years ago. Lead expert Giorgio Tsoukalos joins Ancient Astronaut theorists as this season travels to over a dozen countries to explore firsthand signs of ancient alien visitation.

Season 12

16 Episodes

Air Date: 2017-04-28

Season 13

15 Episodes

Air Date: 2018-04-27

Season 14

22 Episodes

Air Date: 2019-05-31

Season 15

12 Episodes

Air Date: 2020-01-25

Season 16

10 Episodes

Air Date: 2020-11-13

Season 17

7 Episodes

Air Date: 2021-08-06

Season 18

20 Episodes

Air Date: 2022-01-07

Season 19

20 Episodes

Air Date: 2023-01-06

Season 20

20 Episodes

Air Date: 2024-01-05