Documentary•Mystery•Sci-Fi & Fantasy

The Best Seasons of Ancient Aliens

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

Binge this in Unknown•Peaking at 8.8/10

Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives

Airs on

Season 21

17 Episodes

First Aired: Feb 2025

8.0/ 10

Average Rating

Season 20

20 Episodes

First Aired: Jan 2024

7.8/ 10

Average Rating

Season 19

20 Episodes

First Aired: Jan 2023

7.7/ 10

Average Rating

Other Seasons

Season 16

10 Episodes

First Aired: Nov 2020

7.5/ 10

Average Rating

Season 11

15 Episodes

First Aired: May 2016

7.4/ 10

Average Rating

Season 1

5 Episodes

First Aired: Apr 2010

7.4/ 10

Average Rating

Season 12

16 Episodes

First Aired: Apr 2017

7.3/ 10

Average Rating

Season 2

10 Episodes

First Aired: Oct 2010

7.3/ 10

Average Rating

Season 13

15 Episodes

First Aired: Apr 2018

7.2/ 10

Average Rating

#10

Season 15

12 Episodes

First Aired: Jan 2020

7.2/ 10

Average Rating

#11

Season 10

10 Episodes

First Aired: Jul 2015

7.2/ 10

Average Rating

#12

Season 9

12 Episodes

First Aired: Oct 2014

7.1/ 10

Average Rating

#13

Season 4

10 Episodes

First Aired: Feb 2012

7.1/ 10

Average Rating

#14

Season 14

22 Episodes

First Aired: May 2019

7.1/ 10

Average Rating

#15

Season 17

7 Episodes

First Aired: Aug 2021

7.1/ 10

Average Rating

#16

Season 18

20 Episodes

First Aired: Jan 2022

7.0/ 10

Average Rating

#17

Season 5

12 Episodes

First Aired: Dec 2012

6.9/ 10

Average Rating

#18

Season 8

8 Episodes

First Aired: Jun 2014

6.9/ 10

Average Rating

#19

Season 3

16 Episodes

First Aired: Jul 2011

6.9/ 10

Average Rating

#20

Season 7

8 Episodes

First Aired: Jan 2014

6.7/ 10

Average Rating

#21

Season 6

11 Episodes

First Aired: Sep 2013

6.7/ 10

Average Rating