NASA's Unexplained Files (2012)

Name: NASA's Unexplained Files
Genre: Documentary
Rating: 6.5

Documentary

Dive into the mysteries of some of NASA’s most curious missions and explore stories of engineering achievement and human endurance. Each episode offers first hand testimony from astronauts, NASA mission footage, plus beautifully rendered CGI to bring to life these voyages that reveal unexplained sightings that have dogged many of NASA’s most famous missions.

IMDb rating: 6.5 (688 votes)
Episode average: 7.0 +0.5 vs IMDb
Seasons: 6
Streaming (US): Disney+ · HBO Max
Language: EN
Type: TV series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

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Ratings refreshed Oct 3, 2026 · 6 seasons indexed

Seasons

Season 1 (2012)

6.43 avg 10 episodes 6.5 → 6.0 44 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
0	International Space Station - 2005-03-28	6.5	42
1	Pilot	5.9	30
2	Shadow Deathstar	6.7	20
3	Alien Death Ray	6.3	44
4	Black Knight Rises	6.8	37
5	Interstellar Gold Rush	6.5	38
6	Ghosts on the Moon	6.5	16
7	Mystery Space Squid	6.3	12
8	U.S. UFO & The Saturn Mega Hex	6.8	27
9	The Aristarchus Enigma & Martian Space Station	6.0	25

Season 2 (2015)

6.91 avg 8 episodes 6.9 → 7.0 43 min avg

Season 2 episodes - IMDb ratings
#	Title	Rating	Votes
1	Life in Hell	6.9	24
2	Top Secret Terror	6.8	27
3	Hammer of Thor	6.7	28
4	Spacewalk of Doom	6.9	29
5	Did We Nuke Jupiter?	6.9	29
6	Nazis on the Moon	7.1	26
7	Lethal Weapons	7.0	22
8	Revenge of the Fireflies	7.0	28

Season 3 (2016)

7.12 avg 14 episodes 7.1 → 7.2 43 min avg

Season 3 episodes - IMDb ratings
#	Title	Rating	Votes
1	Pluto Under Pressure	7.1	32
2	Return of the Moon Bugs	6.9	32
3	Rise of the Ice Creatures	6.9	29
4	Ghosts on a Comet	7.0	27
5	The Moon That Disappeared	7.0	28
6	Curse of the Red Planet	7.6	34
7	Red Storm Rising	7.5	30
8	Attack of the Thunderballs	7.1	26
9	Space's Deadliest Moments	7.2	12
10	The Moon's Greatest Mystery's	7.3	14
11	Space Station of Doom	7.0	12
12	When the Universe Attacks	6.9	11
13	Mars's Strangest Secrets	7.0	14
14	Horror in the Cosmos	7.2	10

Season 4 (2016)

7.00 avg 8 episodes 6.7 → 7.3 42 min avg

Big finale

Season 4 episodes - IMDb ratings
#	Title	Rating	Votes
1	Pluto's Stranger Things	6.7	28
2	Rise of the Planet Killer	6.9	30
3	A President's Close Encounter	7.2	28
4	The Earth Next Door	7.0	28
5	Curse of the Full Moon	6.6	25
6	Did Earth Have Two Moons?	7.2	31
7	Mystery of the Invisible Planet	7.1	27
8	Mar's Deepest Secret	7.3	27

Season 5 (2017)

7.48 avg 9 episodes 7.5 → 7.3 42 min avg

Season 5 episodes - IMDb ratings
#	Title	Rating	Votes
0	Moon Mystery Special	7.5	11
1	JFK UFO Conspiracy	7.5	28
2	Curse of the Gas Giant	7.3	24
3	The Sun's Evil Twin	7.8	17
4	Secret Aliens	7.5	17
5	Stonehenge on Mars	7.2	23
6	CIA's Secret Revenge	7.7	19
7	The Moon's Strange Secret	7.5	20
8	Saturn's Death Star	7.3	19

Season 6 (2019)

7.08 avg 8 episodes 6.8 → 7.4 42 min avg

Season 6 episodes - IMDb ratings
#	Title	Rating	Votes
1	Saturn's Moon Monsters	6.8	25
2	Aliens vs. Stalin at Area 51	7.7	25
3	The Black Hole Next Door	7.2	27
4	Pluto's Evil Twin	7.0	23
5	Aliens in the Amazon	6.9	24
6	Secrets of the Alien Signals	6.9	27
7	Planet of the Metal Aliens	6.7	26
8	Did Aliens Nuke Mars?	7.4	21