What are the best episodes of Space's Deepest Secrets?

The best rated episodes of Space's Deepest Secrets are: Quest for the First Star - S1E8 rated 8.7, Attack of the Space Junk - S1E7 rated 8.1, Mission to the Red Planet - S4E2 rated 8.1, Pluto's Strange Secrets - S4E10 rated 8.0, Mars: The Next Frontier - S4E7 rated 8.0, Journey to Alien Earths - S4E4 rated 8.0, Mystery of the Alien Megastructure - S5E2 rated 7.9, The Universe's Greatest Hits - S1E1 rated 7.9, Pluto: Back From The Dead - S7E1 rated 7.9, Dark Secrets of the Solar System - S6E5 rated 7.9

What are the worst episodes of Space's Deepest Secrets?

The lowest rated episodes of Space's Deepest Secrets are: Inside NASA's Mission to Mars - S1E10 rated 6.5, Hunt for the Hidden Cosmos - S3E1 rated 6.6, Dark Secret of the Universe - S1E13 rated 7.0, When Meteors Attack - S3E2 rated 7.0, The Sun's Greatest Mysteries - S3E6 rated 7.1, The Truth Behind Parallel Universes - S1E12 rated 7.1, Inside the New Space Race - S3E3 rated 7.2, Wrath of the Black Hole - S4E5 rated 7.2, Jupiter: Mystery of the Solar System - S7E4 rated 7.2, The Giant Ice Planets - S8E5 rated 7.2

Space's Deepest Secrets Episode Rating Graph

Apr 2016 - present

7.5

Space's Deepest Secrets Episode Rating Graph poster

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Browse episode ratings trends for Space's Deepest Secrets. Simply click on the interactive rating graph to explore the best and worst of Space's Deepest Secrets's 68 episodes.

Best Episodes of Space's Deepest Secrets

Quest for the First Star
S1 Ep8
8.7
14th Jun 2016
The search for the first stars of the universe.
Attack of the Space Junk
S1 Ep7
8.1
7th Jun 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.
Mission to the Red Planet
S4 Ep2
8.1
22nd May 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.
Pluto's Strange Secrets
S4 Ep10
8.0
14th Oct 2018
NASA's mission to Pluto gathered the first close-up pictures of this strange and distant world, and now, new discoveries and the latest science reveal the secrets of its alien features, which could point to extraterrestrial life.
Mars: The Next Frontier
S4 Ep7
8.0
26th Jun 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.
Journey to Alien Earths
S4 Ep4
8.0
5th Jun 2018
New discoveries of alien earths reveal vital clues in finding extraterrestrial life. Using the latest science and technology, experts reveal the strange landscapes and oceans of these distant worlds.
Mystery of the Alien Megastructure
S5 Ep2
7.9
22nd Oct 2018
A mysterious star hundreds of light years away might hold the hard evidence of extraterrestrial life, as experts speculate that its bizarre behavior points to proof of a massive alien-made megastructure.
The Universe's Greatest Hits
S1 Ep1
7.9
26th Apr 2016
From the mission that saw Pluto for the first time to the Mars rovers, a new breed of explorers are risking their careers, and even their lives, to lead humanity to worlds we have never seen and tackle the mysteries of life itself.
Pluto: Back From The Dead
S7 Ep1
7.9
8th Sep 2020
A spacecraft captures the first close-up images of the dwarf planet Pluto.
Dark Secrets of the Solar System
S6 Ep5
7.9
16th Apr 2019
New evidence is rewriting the history of our solar system, and using the latest discoveries and cutting-edge tech, experts are investigating if our cosmic neighborhood once featured oversized alien Earths and a second Sun.
Journey to Saturn's Rings
S5 Ep3
7.9
29th Oct 2018
New discoveries change everything known about Saturn's rings, revealing that they're newer and more mysterious than ever imagined, and that some day soon, they might disappear forever.
Secrets of the Asteroids
S8 Ep6
7.8
5th May 2021
NASA investigates an asteroid in more detail than ever before.
The Plot Against Gravity
S1 Ep6
7.8
31st May 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.
Secret History of the Solar System
S1 Ep11
7.8
6th Aug 2016
The discovery of exoplanets pushes scientists to reexamine the origin of the Solar System; the evidence infers a tale of unrestrained collisions and chaos.
Secret History of the Juno Mission
S4 Ep8
7.8
10th Jul 2018
NASA's Juno mission is the closest we've ever explored Jupiter, and its incredible images reveal the Gas Giant's deepest secrets and how this deadly world helped create our solar system.
The Time Travel Enigma
S4 Ep1
7.8
15th May 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.
Secret History of the Voyager Mission
S1 Ep5
7.8
24th May 2016
Thirty-five years after leaving Earth, the Voyager spacecraft is going to leave the Solar System to tell the incredible story of a mission that was only supposed to last five years but is still going today.
Hunt for the Missing Black Holes
S6 Ep8
7.8
7th May 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.
Inside a Monster Black Hole
S1 Ep14
7.8
27th Aug 2016
Inside the supermassive black hole that sits in the middle of our galaxy.
Asteroid Apocalypse
S6 Ep10
7.8
21st May 2019
New discoveries reveal the apocalyptic consequences of an asteroid strike, and using cutting-edge science, experts are racing to develop tech that can destroy these deadly killers before they unleash Armageddon.

Worst Episodes of Space's Deepest Secrets

Inside NASA's Mission to Mars
S1 Ep10
6.5
28th Jun 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.
Hunt for the Hidden Cosmos
S3 Ep1
6.6
22nd Aug 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.
Dark Secret of the Universe
S1 Ep13
7.0
20th Aug 2016
Scientists are finally on the hunt to finally crack the dark secrets of the atoms that make up the universe.
When Meteors Attack
S3 Ep2
7.0
29th Aug 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.
The Sun's Greatest Mysteries
S3 Ep6
7.1
26th Sep 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.
The Truth Behind Parallel Universes
S1 Ep12
7.1
13th Aug 2016
Scientists are working to determine if parallel universes exist.
Inside the New Space Race
S3 Ep3
7.2
5th Sep 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.
Wrath of the Black Hole
S4 Ep5
7.2
12th Jun 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.
Jupiter: Mystery of the Solar System
S7 Ep4
7.2
29th Sep 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.
The Giant Ice Planets
S8 Ep5
7.2
28th Apr 2021
Astronomers finally unlock the mysteries of Uranus and Neptune.
Mystery of the Northern Lights
S4 Ep9
7.2
17th Jul 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.
Curse of the White Holes
S8 Ep3
7.3
14th Apr 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.
Strangest Alien Storms
S2 Ep2
7.3
18th Apr 2017
New discoveries on alien planets reveal violent storms and strange weather.
Killing the Milky Way
S7 Ep3
7.3
22nd Sep 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.
Curse of the Comets
S6 Ep7
7.3
30th Apr 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.
Rise of the Monster Stars
S2 Ep8
7.3
30th May 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.
Cassini's Grand Finale
S3 Ep5
7.3
19th Sep 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.
Alien Hell Storms
S6 Ep3
7.3
2nd Apr 2019
Jupiter, Saturn, Uranus, and Neptune are homes to the deadliest storms in our solar system, and new discoveries reveal the secrets of this hellish alien weather, helping experts understand these alien worlds better than ever.
Stranger Signals from Alien Worlds
S2 Ep9
7.3
6th Jun 2017
New discoveries reveal radio bursts that may confirm life in the cosmos.
Hunt for the Edge of the Universe
S4 Ep3
7.3
29th May 2018
New discoveries are helping experts map the entire universe, and they are finding strange truths about the cosmos and its unimaginable size.

Space's Deepest Secrets Episode Guide

The Universe's Greatest Hits
S1 Ep1
7.9
26th Apr 2016
From the mission that saw Pluto for the first time to the Mars rovers, a new breed of explorers are risking their careers, and even their lives, to lead humanity to worlds we have never seen and tackle the mysteries of life itself.
Hunt for Dark Energy
S1 Ep2
7.6
3rd May 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.
Death of the Solar System
S1 Ep3
7.4
10th May 2016
An exploration of the dramatic fate of our future descendants, the technology they’ll need to survive the end of this world billions of years from now and our options for colonizing and starting again on a new planet somewhere far from Earth.
Alien Oceans
S1 Ep4
7.7
17th May 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.
Secret History of the Voyager Mission
S1 Ep5
7.8
24th May 2016
Thirty-five years after leaving Earth, the Voyager spacecraft is going to leave the Solar System to tell the incredible story of a mission that was only supposed to last five years but is still going today.
The Plot Against Gravity
S1 Ep6
7.8
31st May 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.
Attack of the Space Junk
S1 Ep7
8.1
7th Jun 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.
Quest for the First Star
S1 Ep8
8.7
14th Jun 2016
The search for the first stars of the universe.
When the Sun Attacks
S1 Ep9
7.7
21st Jun 2016
When the sun flares up, billions of tons of superheated gas and intense radiation are propelled toward Earth; experts are trying to predict what is coming toward the Earth and how to prepare for this threat.
Inside NASA's Mission to Mars
S1 Ep10
6.5
28th Jun 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.
Secret History of the Solar System
S1 Ep11
7.8
6th Aug 2016
The discovery of exoplanets pushes scientists to reexamine the origin of the Solar System; the evidence infers a tale of unrestrained collisions and chaos.
The Truth Behind Parallel Universes
S1 Ep12
7.1
13th Aug 2016
Scientists are working to determine if parallel universes exist.
Dark Secret of the Universe
S1 Ep13
7.0
20th Aug 2016
Scientists are finally on the hunt to finally crack the dark secrets of the atoms that make up the universe.
Inside a Monster Black Hole
S1 Ep14
7.8
27th Aug 2016
Inside the supermassive black hole that sits in the middle of our galaxy.

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 beyond anyone's imagination. "Space's Deepest Secrets" shares stories of the men and women who pushed their ingenuity and curiosity to uncover some of the most groundbreaking findings in the history of space exploration. Hourlong episodes cover NASA's New Horizons mission to Pluto, the Hubble Telescope, the twin Voyager explorations, and other past, current and future missions and projects.