NaN/100 votesLoading...#1 - Race to Planet 9
Season 2 Episode 7 - Aired 5/23/2017
Scientists believe that there is an undiscovered massive planet lurking at the edge of our solar system. Join researchers as they hunt for this mysterious world, an investigation that could reveal the secret history of the solar system's formation.
Director: N/A
Writer: N/A
NaN/100 votesLoading...#2 - Finding Alien Moons
Season 6 Episode 4 - Aired 4/9/2019
New discoveries are helping experts in their search for the first alien moon outside our solar system, which could be Earth-like worlds with the potential for life. So far, they haven't found any, but twenty-first century methods might change everything.
Director: N/A
Writer: N/A
NaN/100 votesLoading...#3 - 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.
Director: N/A
Writer: N/A
NaN/100 votesLoading...#4 - Hunt for the Missing Black Holes
Season 6 Episode 8 - Aired 5/7/2019
New discoveries might finally reveal how supermassive black holes are made, and using the latest technology, experts are on the verge of understanding how these monsters grow and how they affect life on our planet.
Director: N/A
Writer: N/A
6.9/1014 votesLoading...#5 - Alien Oceans
Season 1 Episode 4 - Aired 5/17/2016
A soaring quest through the solar system’s exotic and hidden water realms, from the deep seas below the icy crust of Europa to the vast prehistoric oceans that once existed on Mars billions of years ago.
Director: N/A
Writer: N/A
7.2/108 votesLoading...#6 - Attack of the Space Junk
Season 1 Episode 7 - Aired 6/7/2016
The efforts of the U.S. government and others to combat the threat posed by space junk, which could derail the future of space travel if left unchecked.
Director: N/A
Writer: N/A
7.3/1017 votesLoading...#7 - Hunt for Dark Energy
Season 1 Episode 2 - Aired 5/3/2016
World scientists are searching for Dark Energy, the biggest challenge of physics; In Europe, a multi-billion dollar satellite will map the sky from space.
Director: N/A
Writer: N/A
7.4/1010 votesLoading...#8 - Quest for the First Star
Season 1 Episode 8 - Aired 6/14/2016
The search for the first stars of the universe.
Director: N/A
Writer: N/A
7.5/108 votesLoading...#9 - Mission to the Red Planet
Season 4 Episode 2 - Aired 5/22/2018
The latest science reveals what it would take to build colonies on Mars, and how our future on the Red Planet might be closer than we think.
Director: N/A
Writer: N/A
7.5/1023 votesLoading...#10 - Bermuda Triangle of Space
Season 8 Episode 4 - Aired 4/21/2021
Scientists have detected a region of space they have yet to understand.
Director: N/A
Writer: N/A
7.6/1010 votesLoading...#11 - The Time Travel Enigma
Season 4 Episode 1 - Aired 5/15/2018
Time travel is less impossible than we think, and the newest discoveries in space and theoretical physics have us on the brink of cracking one of the universe's greatest puzzles.
Director: N/A
Writer: N/A
7.6/105 votesLoading...#12 - Mars: The Next Frontier
Season 4 Episode 7 - Aired 6/26/2018
Modern-day explorers are competing in a new space race to send the first people to Mars, and cutting-edge technology might make the Red Planet the next home for humans life.
Director: N/A
Writer: N/A
7.7/107 votesLoading...#13 - 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.
Director: N/A
Writer: N/A
7.7/106 votesLoading...#14 - 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.
Director: N/A
Writer: N/A
7.7/1010 votesLoading...#15 - 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.
Director: Tom Ranson
Writer: N/A
7.7/107 votesLoading...#16 - Mystery of the Alien Asteroid
Season 6 Episode 1 - Aired 3/19/2019
When a strange alien object is discovered speeding through our solar system, experts race to uncover if it's real evidence of extraterrestrial contact or a deadly asteroid on a collision course with planet earth.
Director: N/A
Writer: N/A
7.7/1010 votesLoading...#17 - 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.
Director: N/A
Writer: N/A
7.8/105 votesLoading...#18 - The Truth Behind Parallel Universes
Season 1 Episode 12 - Aired 8/13/2016
Scientists are working to determine if parallel universes exist.
Director: N/A
Writer: N/A
7.8/105 votesLoading...#19 - 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.
Director: N/A
Writer: N/A
7.8/108 votesLoading...#20 - Secret History of the Big Bang
Season 2 Episode 10 - Aired 6/13/2017
Scientists are on a race to find the beginning of time and space: the Big Bang. Cutting-edge technology helps astronomers look back in time to uncover the mysteries of our universe's creation, revealing hat happened in the first moments of the cosmos.
Director: N/A
Writer: N/A
7.8/108 votesLoading...#21 - 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 the secrets of the greatest enigmas in the cosmos, from giant black holes to supernovas.
Director: N/A
Writer: N/A
7.8/108 votesLoading...#22 - 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.
Director: N/A
Writer: N/A
7.8/106 votesLoading...#23 - 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.
Director: N/A
Writer: N/A
7.8/109 votesLoading...#24 - Mystery of the Dead Planets
Season 8 Episode 1 - Aired 3/31/2021
Astronomers unmask the truly destructive nature of the cosmos.
Director: N/A
Writer: N/A
7.9/1015 votesLoading...#25 - The Plot Against Gravity
Season 1 Episode 6 - Aired 5/31/2016
The story of how a large aerospace company, BAE Systems, began a secret project to counter the force of gravity while NASA simultaneously ran a similar ‘Breakthrough Propulsion Physics’ program.
Director: N/A
Writer: N/A
The Worst Episodes of Space's Deepest Secrets
Every episode of Space's Deepest Secrets ranked from worst to best. Explore the Worst Episodes of Space's Deepest Secrets!
A new breed of explorer has taken space travel beyond the moon to unlock and reveal first-ever views of alien worlds and cosmic bodies far...
Genre:Documentary
Network:Science
Worst Episodes Summary
"Race to Planet 9" is the worst rated episode of "Space's Deepest Secrets". It scored N/A/10 based on 0 votes. Directed by N/A and written by N/A, it aired on 5/23/2017. This episode scored NaN points lower than the second lowest rated, "Finding Alien Moons".