Ancient Aliens — 2009-present · 21 seasons · 281 eps

★ 7.0

Ancient Aliens poster

Ancient Aliens

2009-present 21 seasons 281 episodes

★ 7.0 (13,434 votes) Bottom 30%

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 historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.

Episode Ratings Grid

Every episode at a glance, color-coded by rating. Rows are episode numbers within each season, columns are seasons.

Size: M

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16

S17

S18

S19

S20

S21

E1

7.6

7.3

7.0

7.4

7.1

6.7

6.9

6.8

7.2

7.5

7.9

7.2

7.6

7.9

7.9

7.3

7.2

7.5

7.6

7.4

7.4

E2

7.5

7.2

6.9

7.2

6.8

6.2

6.7

7.1

7.5

7.4

7.8

7.5

7.2

6.5

7.0

7.4

7.2

7.1

7.8

6.7

7.5

E3

7.4

7.6

7.0

7.2

7.0

7.2

6.4

6.7

6.9

7.0

7.4

7.3

7.2

7.7

7.7

7.4

6.7

7.2

8.1

7.5

7.8

E4

7.3

7.2

7.2

6.7

6.8

6.4

6.8

6.3

7.0

6.9

7.5

8.0

7.4

7.3

6.8

7.4

6.9

7.3

7.8

7.5

8.2

E5

7.4

7.3

6.8

7.6

6.7

6.2

7.1

6.6

6.9

7.1

7.1

7.2

7.3

7.6

7.0

7.8

7.2

7.0

7.2

7.6

7.5

E6

7.3

7.2

7.7

7.9

6.8

6.4

6.3

7.7

6.9

7.4

6.9

7.5

7.3

7.5

7.8

8.0

7.1

7.2

7.4

7.2

7.5

E7

6.9

7.0

6.3

6.6

6.4

6.7

6.8

7.2

6.6

7.4

7.6

7.6

7.0

7.1

8.0

7.2

7.0

7.7

8.0

8.8

E8

7.5

7.2

7.3

6.8

6.5

6.9

7.0

7.4

7.6

7.4

7.5

7.2

7.0

6.7

6.9

6.8

7.5

7.5

8.2

E9

7.1

6.7

7.1

6.7

7.0

6.5

6.4

7.3

7.1

7.8

7.2

7.2

6.6

7.2

6.8

8.0

7.7

8.0

E10

7.1

7.3

6.6

7.2

7.0

7.4

6.7

7.2

7.3

7.2

6.9

7.4

7.7

7.3

7.9

7.8

8.4

E11

6.3

6.9

6.6

7.4

7.8

7.3

7.2

6.9

7.2

—

6.8

7.9

8.5

8.0

E12

6.3

6.9

7.5

7.4

6.7

7.0

7.7

7.1

—

6.3

7.5

8.0

8.3

E13

6.9

7.2

7.0

6.7

6.2

—

6.3

7.6

7.9

8.1

E14

5.9

7.5

7.0

7.4

7.1

9.0

6.6

7.7

8.0

7.9

E15

6.7

7.5

7.0

6.9

6.7

6.5

8.2

8.0

8.3

E16

7.0

7.5

6.8

6.7

7.9

7.8

8.4

E17

6.9

6.9

7.9

8.3

7.9

E18

6.5

7.4

7.6

8.3

?

E19

6.6

7.0

7.8

7.7

?

E20

7.3

8.0

7.6

8.6

E21

7.2

E22

7.3

Avg

7.4

7.2

6.9

7.1

6.9

6.6

6.7

6.8

7.1

7.2

7.4

7.3

7.2

7.1

7.2

7.6

7.1

7.0

7.7

7.8

8.0

Excellent

Great

Good

Mid

Bad

Episode Power Rankings

The best and worst episodes at a glance. Use this to find must-watch episodes or ones you might want to skip.

🏆 Top Episodes

#1 9.0

S16E14 The Alien Shape

#2

S21E7 8.8

Mysteries of the Aztecs

The Aztecs built one of the world's most powerful and feared empires and they claimed that they were guided by a pantheon of more than a thousand gods who came to Earth from different parts of the universe. Could the incredible story of their rise to power and their sudden demise, reveal a history of extraterrestrial intervention in Mesoamerica?

#3

S20E20 8.6

Resurrecting Puma Punku

Puma Punku in Bolivia features stone blocks, each carved with precision; the blocks lie scattered across the landscape, confusing archaeologists as to what the ancient site might have been.

4. S20E11 "Mysteries of the Maya" 8.5
5. S21E10 "The Volcano Factor" 8.4
6. S21E16 "Mysteries of the Norse Gods" 8.4
7. S20E17 "Egypt's Giant Tombs" 8.3
8. S20E18 "The Linda Moulton Howe Files" 8.3
9. S21E12 "The Abduction Files" 8.3
10. S21E15 "Britain's UFO Files" 8.3

📉 Bottom Episodes

#279

S3E14 5.9

Aliens and the Undead

Zombies rising from their graves... Blood sucking vampires damned for all eternity... and humans trapped in a life and death struggle between heaven and hell. For thousands of years, mankind has told tales of encounters with strange, soulless creatures. Are these beliefs merely manmade fabrications - or could there be extraterrestrial origins in earthly encounters with the undead?

278. S14E13 "The Constellation Code" 6.2
277. S6E5 "The Satan Conspiracy" 6.2
276. S6E2 "The Crystal Skulls" 6.2
275. S18E13 "Decoding the Alien Glyphs" 6.3

The Quality Arc

Each point is an episode, plotted chronologically. The colored bands mark season boundaries. Look for upward or downward trends to see if quality improved or declined over time.

Trend

Episode Engagement

Vote count shows how many people cared enough to rate. High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.

Rating threshold:

34 Standouts

106 Infamous

59 Hidden Gems

80 Forgettable

Top Standout: S1E0 Chariots, Gods and Beyond

Most Infamous: S3E14 Aliens and the Undead

Best Hidden Gem: S16E14 The Alien Shape

Episodes plotted by rating vs. vote count. The vertical line marks the rating threshold (7.5). More votes = more engagement. Toggle above to compare against global or show-specific median.

Series Trajectory

A simplified view: one point per season. This smooths out episode-to-episode noise to show the overall arc of the series.

Trend

Season Momentum

Did each season build momentum or fizzle out? Green arrows mean the finale rated higher than the premiere. Red means the opposite. Longer arrows = bigger swings.

Season Consistency

Some seasons are reliable bangers. Others are hit-or-miss. Each dot is an episode. Tightly clustered dots mean consistent quality. Scattered dots mean a mixed bag.

Each dot is an episode. Clustered dots = consistent quality. Scattered dots = variable season. Hover for episode details.