The BEST seasons of Ancient Aliens

#1 - Season 10

First Aired 7/25/2015

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?

#2 - Season 15

First Aired 1/26/2020

#3 - Season 12

First Aired 4/29/2017

#4 - Season 8

First Aired 6/14/2014

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?

#5 - Season 5

First Aired 12/22/2012

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.

#6 - Season 2

First Aired 10/29/2010

#7 - Season 4

First Aired 2/18/2012

#8 - Season 3

First Aired 7/29/2011

#9 - Season 9

First Aired 11/1/2014

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.

#10 - Season 18

First Aired 1/8/2022

#11 - Season 1

First Aired 4/21/2010

#12 - Season 14

First Aired 6/1/2019

#13 - Season 11

First Aired 5/7/2016

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.

#14 - Season 19

First Aired 1/7/2023

#15 - Season 6

First Aired 10/1/2013

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.

#16 - Season 16

First Aired 11/14/2020

#17 - Season 13

First Aired 4/28/2018

#18 - Season 7

First Aired 1/25/2014

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?

#19 - Season 17

First Aired 8/7/2021

#20 - Season 20

First Aired 1/6/2024