The WORST episodes of Space's Deepest Secrets

Every episode of Space's Deepest Secrets ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Space's Deepest Secrets!

The stories of deep-space explorers who are risking their careers, and even their lives, to lead humanity to worlds yet to be seen.

Last Updated: 4/17/2024Network: Science ChannelStatus: Continuing
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Inside NASA's Mission to Mars
star
6.50
2 votes

#1 - Inside NASA's Mission to Mars

Season 1 - Episode 10 - Aired 6/28/2016

An in-depth look at how NASA is preparing for its most ambitious and dangerous mission yet; to land a human being on the surface of Mars.

Watch Now:Amazon
Hunt for the Hidden Cosmos
star
6.56
18 votes

#2 - Hunt for the Hidden Cosmos

Season 3 - Episode 1 - Aired 8/22/2017

New telescope technology has helped astronomers to explore the never-before-seen invisible universe. These modern marvels ushered in a new age of discovery, revealing secrets of greatest enigmas in the cosmos, from giant black holes to supernovas.

Watch Now:Amazon
Curse of the White Holes
star
6.94
16 votes

#3 - Curse of the White Holes

Season 8 - Episode 3 - Aired 4/14/2021

Einstein predicted strange cosmic phenomena known as white holes, but scientists have yet to prove they exist; as experts investigate the tiny black holes that hide in the most ancient parts of the universe, they might finally find the smoking gun.

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Dark Secret of the Universe
star
6.96
25 votes

#4 - Dark Secret of the Universe

Season 1 - Episode 13 - Aired 8/20/2016

Scientists are finally on the hunt to finally crack the dark secrets of the atoms that make up the universe.

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When Meteors Attack
star
7.00
17 votes

#5 - When Meteors Attack

Season 3 - Episode 2 - Aired 8/29/2017

Meteors are a deadly threat for our planet, but new technology may provide a way for Earth to fight back when they attack. Join experts as they uncover the mysteries behind these fascinating and terrifying celestial objects.

Watch Now:AmazonApple TV
The Sun's Greatest Mysteries
star
7.12
17 votes

#6 - The Sun's Greatest Mysteries

Season 3 - Episode 6 - Aired 9/26/2017

The latest discoveries reveal the mysterious and ever-changing nature of our sun; astronomers are only now beginning to understand the vast power of our giant star, and new ground-breaking investigations show it like never before.

Watch Now:AmazonApple TV
The Truth Behind Parallel Universes
star
7.14
29 votes

#7 - The Truth Behind Parallel Universes

Season 1 - Episode 12 - Aired 8/13/2016

Scientists are working to determine if parallel universes exist.

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Inside the New Space Race
star
7.15
20 votes

#8 - Inside the New Space Race

Season 3 - Episode 3 - Aired 9/5/2017

Space entrepreneurs are on a race to transform space travel to create a home for humans beyond Earth. In this twenty-first century Space Race, modern day visionaries as they plan regular rocket launches, space hotels, and colonies on Mars.

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Wrath of the Black Hole
star
7.15
13 votes

#9 - Wrath of the Black Hole

Season 4 - Episode 5 - Aired 6/12/2018

New discoveries change everything known about black holes, and using the latest science and technology, experts reveal secrets to the mysterious behind these strange and deadly places.

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Jupiter: Mystery of the Solar System
star
7.19
16 votes

#10 - Jupiter: Mystery of the Solar System

Season 7 - Episode 4 - Aired 9/29/2020

Generations of astronomers have attempted to solve the mysteries of Jupiter, the most fierce and extreme planet in the Solar System, and now experts reveal new evidence that could unlock the secrets of why this planet is so strange.

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Space Force Declassified
star
7.21
14 votes

#11 - Space Force Declassified

Season 8 - Episode 7 - Aired 5/12/2021

Discover the cutting-edge race to build the ultimate space weapon.

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The Giant Ice Planets
star
7.21
14 votes

#12 - The Giant Ice Planets

Season 8 - Episode 5 - Aired 4/28/2021

Astronomers finally unlock the mysteries of Uranus and Neptune.

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Mystery of the Northern Lights
star
7.24
17 votes

#13 - Mystery of the Northern Lights

Season 4 - Episode 9 - Aired 7/17/2018

The aurora borealis is one of Earth's most incredible sights, and new discoveries finally explain why these mysterious lights appear and what they reveal about the sun's sinister and deadly powers.

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Strangest Alien Storms
star
7.27
30 votes

#14 - Strangest Alien Storms

Season 2 - Episode 2 - Aired 4/18/2017

New discoveries on alien planets reveal the most violent storms and strangest weather in the universe including the possibility of raining rubies and diamonds, frozen wastelands and hellish infernos.

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Killing the Milky Way
star
7.31
26 votes

#15 - Killing the Milky Way

Season 7 - Episode 3 - Aired 9/22/2020

Across the Milky Way, galaxies are going dark, and scientists don't know why the stars are losing their shine; astronomers race against time to uncover the truth behind how galaxies are born and how they die before all of the lights go out.

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Curse  of the Comets
star
7.31
16 votes

#16 - Curse of the Comets

Season 6 - Episode 7 - Aired 4/30/2019

New discoveries reveal the dark secrets of comets, and using the latest tech, experts might prove that these mysterious alien visitors are the reason for all life on earth.

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Rise of the Monster Stars
star
7.32
19 votes

#17 - Rise of the Monster Stars

Season 2 - Episode 8 - Aired 5/30/2017

The most extreme stars in our universe could be the key to understanding life in the cosmos. These monster stars are among the oldest in the universe, and can be hundreds of times larger than our Sun and burn over million times brighter.

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Cassini's Grand Finale
star
7.32
22 votes

#18 - Cassini's Grand Finale

Season 3 - Episode 5 - Aired 9/19/2017

Go inside the final moments of NASA's Cassini mission, a 20-year project to explore Saturn and its moons; Cassini revealed the secrets of strange new worlds that could harbor alien life, changing everything we know about our Solar System.

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Wrath  of the Sun
star
7.33
21 votes

#19 - Wrath of the Sun

Season 6 - Episode 9 - Aired 5/14/2019

New discoveries reveal the apocalyptic threats that our Sun poses to life on Earth, and using the latest tech, experts are uncovering the deadly secrets of our solar system's star.

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Hunt for the Edge of the Universe
star
7.33
21 votes

#20 - Hunt for the Edge of the Universe

Season 4 - Episode 3 - Aired 5/29/2018

New discoveries are helping experts map the entire universe, and they are finding strange truths about the cosmos and its unimaginable size.

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Stranger Signals from Alien Worlds
star
7.33
24 votes

#21 - Stranger Signals from Alien Worlds

Season 2 - Episode 9 - Aired 6/6/2017

For decades, researchers have been scouring the universe for signals from extraterrestrials. New discoveries reveal mysterious fast radio bursts from space that may be the key to confirming life in the cosmos.

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Expedition Extraterrestrial
star
7.35
20 votes

#22 - Expedition Extraterrestrial

Season 3 - Episode 7 - Aired 10/3/2017

Scientists on the hunt for extraterrestrial life suspect that it might be closer than we think: our very own solar system; using the latest discoveries, experts might at last confirm that our neighbors might harbor alien life.

Watch Now:AmazonApple TV
Space's Great Wall
star
7.38
16 votes

#23 - Space's Great Wall

Season 8 - Episode 2 - Aired 4/7/2021

Astronomers make an extraordinary discovery when they uncover a cosmic mega-structure that's one billion light-years long, and now investigators race to decode the hidden forces that shape the most massive and mysterious structure known in the Universe.

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When Black Holes Collide
star
7.38
16 votes

#24 - When Black Holes Collide

Season 3 - Episode 8 - Aired 10/10/2017

An exploration of gravitational waves.

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Curse of Dark Matter
star
7.39
23 votes

#25 - Curse of Dark Matter

Season 2 - Episode 6 - Aired 5/16/2017

Recent discoveries have revealed vast clouds of dark matter in the universe; this mysterious matter could be proof that multiple universes exist; researchers investigate the secrets of dark matter.

Watch Now:Amazon