All Seasons

Season 1

  • S01E01 The Universe's Greatest Hits

    • April 26, 2016
    • Science Channel

    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.

  • S01E02 Hunt for Dark Energy

    • May 3, 2016
    • Science Channel

    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.

  • S01E03 Death of the Solar System

    • May 10, 2016
    • Science Channel

    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.

  • S01E04 Alien Oceans

    • May 17, 2016
    • Science Channel

    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.

  • S01E05 Secret History of the Voyager Mission

    • May 24, 2016
    • Science Channel

    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.

  • S01E06 The Plot Against Gravity

    • May 31, 2016
    • Science Channel

    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.

  • S01E07 Attack of the Space Junk

    • June 7, 2016
    • Science Channel

    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.

  • S01E08 Quest for the First Star

    • June 14, 2016
    • Science Channel

    The search for the first stars of the universe.

  • S01E09 When the Sun Attacks

    • June 21, 2016
    • Science Channel

    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.

  • S01E10 Inside NASA's Mission to Mars

    • June 28, 2016
    • Science Channel

    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.

  • S01E11 Secret History of the Solar System

    • August 6, 2016
    • Science Channel

    The discovery of exoplanets pushes scientists to reexamine the origin of the Solar System; the evidence infers a tale of unrestrained collisions and chaos.

  • S01E12 The Truth Behind Parallel Universes

    • August 13, 2016
    • Science Channel

    Scientists are working to determine if parallel universes exist.

  • S01E13 Dark Secret of the Universe

    • August 20, 2016
    • Science Channel

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

  • S01E14 Inside a Monster Black Hole

    • August 27, 2016
    • Science Channel

    Inside the supermassive black hole that sits in the middle of our galaxy.

Season 2

  • S02E01 NASA's Greatest Moments

    • April 11, 2017
    • Science Channel

    Counting down the greatest moments in NASA's nearly sixty year history, revealing the incredible stories behind the missions and discoveries that have remade our understanding of the Final Frontier

  • S02E02 Strangest Alien Storms

    • April 18, 2017
    • Science Channel

    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.

  • S02E03 Black Holes: The Einstein Prophecy

    • April 25, 2017
    • Science Channel

    Researchers investigate the dark secrets of the mysterious phenomenon known as black holes.

  • S02E04 Secret History of Jupiter

    • May 2, 2017
    • Science Channel

    NASA's Juno mission reveals secrets about Jupiter, a strange world that is more like a star than a planet; learning what lies beneath the planet's violent storms provides scientists with a new understanding of the solar system.

  • S02E05 Mysteries of Alien Volcanoes

    • May 9, 2017
    • Science Channel

    New research into our solar system's alien volcanoes reveal shocking discoveries; many of these fiery wonders are similar to the volcanoes on Earth, and some might even have created the conditions for extraterrestrial life.

  • S02E06 Curse of Dark Matter

    • May 16, 2017
    • Science Channel

    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.

  • S02E07 Race to Planet 9

    • May 23, 2017
    • Science Channel

    Scientists believe that there is an undiscovered massive planet lurking at the edge of the 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.

  • S02E08 Rise of the Monster Stars

    • May 30, 2017
    • Science Channel

    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.

  • S02E09 Stranger Signals from Alien Worlds

    • June 6, 2017
    • Science Channel

    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.

  • S02E10 Secret History of the Big Bang

    • June 13, 2017
    • Science Channel

    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 the first moments of the cosmos.

Season 3

  • S03E01 Hunt for the Hidden Cosmos

    • August 22, 2017
    • Science Channel

    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.

  • S03E02 When Meteors Attack

    • August 29, 2017
    • Science Channel

    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.

  • S03E03 Inside the New Space Race

    • September 5, 2017
    • Science Channel

    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.

  • S03E04 Search for Alien Earths

    • September 12, 2017
    • Science Channel

    Astronomers and researchers are on the hunt for the groundbreaking discovery that confirms extraterrestrial life; using state-of-the-art technology like the Kepler telescope, scientists examine thousands of exoplanets in search of another Earth.

  • S03E05 Cassini's Grand Finale

    • September 19, 2017
    • Science Channel

    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.

  • S03E06 The Sun's Greatest Mysteries

    • September 26, 2017
    • Science Channel

    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.

  • S03E07 Expedition Extraterrestrial

    • October 3, 2017
    • Science Channel

    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.

  • S03E08 When Black Holes Collide

    • October 10, 2017
    • Science Channel

    An exploration of gravitational waves.

Season 4

  • S04E01 The Time Travel Enigma

    • May 15, 2018
    • Science Channel

    Scientists may be on the verge of cracking time travel, one of the universe's greatest puzzles, due to new discoveries in space and theoretical physics.

  • S04E02 Mission to the Red Planet

    • May 22, 2018
    • Science Channel

    The latest science shows what it would take to build colonies on Mars and why human colonization of the Red Planet may take place in the not-too-distant future.

  • S04E03 Hunt for the Edge of the Universe

    • May 29, 2018
    • Science Channel

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

  • S04E04 Journey to Alien Earths

    • June 5, 2018
    • Science Channel

    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.

  • S04E05 Wrath of the Black Hole

    • June 12, 2018
    • Science Channel

    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.

  • S04E06 New Race to the Moon

    • June 19, 2018
    • Science Channel

    New discoveries reveal that our Moon could be the next home for human life, triggering a new international space race to make it the home of humanity’s first space colony.

  • S04E07 Mars: The Next Frontier

    • June 26, 2018
    • Science Channel

    Modern day explorers are competing in a new space race to send the first people to Mars.

  • S04E08 Secret History of the Juno Mission

    • July 10, 2018
    • Science Channel

    NASA’s Juno mission explored Jupiter, and its images reveal the gas giant’s deepest secrets.

  • S04E09 Mystery of the Northern Lights

    • July 17, 2018
    • Science Channel

    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.

  • S04E10 Pluto's Strange Secrets

    • October 14, 2018
    • Science Channel

    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.

Season 5

  • S05E01 Dark Origins of the Moon

    • October 15, 2018
    • Science Channel

    New discoveries reveal that everything known about the moon could be wrong; investigators race to understand the mysteries of its dark and violent past.

  • S05E02 Mystery of the Alien Megastructure

    • October 22, 2018
    • Science Channel

    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.

  • S05E03 Journey to Saturn's Rings

    • October 29, 2018
    • Science Channel

    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.

Season 6

  • S06E01 Mystery of the Alien Asteroid

    • March 19, 2019
    • Science Channel

    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.

  • S06E02 Secrets of the Seven Earths

    • March 26, 2019
    • Science Channel

    The new discovery of seven alien Earth-like planets in a faraway solar system is a major milestone in our hunt for extraterrestrial life, and experts investigate the secrets of TRAPPIST-1's mysterious worlds to reveal if we're truly alone in the universe.

  • S06E03 Alien Hell Storms

    • April 2, 2019
    • Science Channel

    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.

  • S06E04 Finding Alien Moons

    • April 9, 2019
    • Science Channel

    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.

  • S06E05 Dark Secrets of the Solar System

    • April 16, 2019
    • Science Channel

    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.

  • S06E06 Is the Universe a Hologram?

    • April 23, 2019
    • Science Channel

    Shocking new evidence has convinced some of the world's greatest physicists that the universe is a hologram, and using cutting-edge technology, they investigate the secrets of black holes and space-time to build the case for this game-changing discovery.

  • S06E07 Curse of the Comets

    • April 30, 2019
    • Science Channel

    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.

  • S06E08 Hunt for the Missing Black Holes

    • May 7, 2019
    • Science Channel

    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.

  • S06E09 Wrath of the Sun

    • May 14, 2019
    • Science Channel

    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.

  • S06E10 Asteroid Apocalypse

    • May 21, 2019
    • Science Channel

    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.

  • S06E11 Mars' Alien Secrets

    • May 28, 2019
    • Science Channel

    The latest NASA missions to Mars might finally reveal if it is home to alien life, and using these brand-new discoveries, experts are rethinking everything they know about the Red Planet.

Season 7

  • S07E01 Pluto: Back From The Dead

    • September 8, 2020
    • Science Channel

    A spacecraft captures the first close-up images of the dwarf planet Pluto.

  • S07E02 Hunt for the Mars Aliens

    • September 15, 2020
    • Science Channel

    NASA's brand-new Mars rover is on the hunt for alien life, and with the help of cutting-edge engineering, scientists embark on a search for fossilized remains, which might prove the Red Planet was once home to a vast ocean and extraterrestrial life.

  • S07E03 Killing the Milky Way

    • September 22, 2020
    • Science Channel

    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.

  • S07E04 Jupiter: Mystery of the Solar System

    • September 29, 2020
    • Science Channel

    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.

Season 8

  • S08E01 Mystery Of The Dead Planets

    • March 31, 2021
    • Science Channel

    Astronomers are laying the groundwork to locate a new planet for the human race to inhabit, and the more alien worlds they discover and encounter, the more they unmask the mysterious and truly destructive nature of the cosmos.

  • S08E02 Space's Great Wall

    • April 7, 2021
    • Science Channel

    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.

  • S08E03 Curse of the White Holes

    • April 14, 2021
    • Science Channel

    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.

  • S08E04 Bermuda Triangle of Space

    • April 21, 2021
    • Science Channel

    Scientists have detected a region of space they have yet to understand.

  • S08E05 The Giant Ice Planets

    • April 28, 2021
    • Science Channel

    Astronomers finally unlock the mysteries of Uranus and Neptune.

  • S08E06 Secrets of the Asteroids

    • May 5, 2021
    • Science Channel

    One of NASA's most ambitious missions is investigating an asteroid in more detail than ever before, revealing how space rocks can kick-start life on other planets and how they could possibly hold answers to the secrets of the Solar System

  • S08E07 Space Force Declassified

    • May 12, 2021
    • Science Channel

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

  • S08E08 Secrets of the Hubble

    • Science Channel

    A secret history of life-or-death missions has been concealed to keep the Hubble Space Telescope working since its launch; now, NASA astronauts reveal the truth behind how this complex machine continues to make astonishing new discoveries.

Additional Specials

  • SPECIAL 0x1 Journey to Alien Worlds

    • October 16, 2017
    • Science Channel

  • SPECIAL 0x2 Stars from Hell

    • October 23, 2017
    • Science Channel

    New discoveries reveal the secrets of the most extreme stars in the universe. This episode is a mashup of S02E08, “Rise of the Monster Stars” and another Science Channel show “How the Universe Works”, S05E05, “Stars That Kill”

  • SPECIAL 0x3 Curse of the Black Holes

    • October 30, 2017
    • Science Channel

    New discoveries uncover the mysterious nature of black holes. This episode is a mashup of S02E03, “Black Holes: The Einstein Prophecy” and another Science Channel show “How the Universe Works”, S05E03, “Black Holes: The Secret Origin”.

  • SPECIAL 0x4 Riddles of the Sun

    • November 6, 2017
    • Science Channel

    New discoveries reveal the secrets of our sun. This episode is a mashup of SDS S03E06, “The Sun's Greatest Mysteries”, and an episode from another series, “Strip the Cosmos”, S01E06, “Hunting a Comet”

  • SPECIAL 0x5 NASA's Legendary Missions

    • November 13, 2017
    • Science Channel

    Untold stories from some of NASA's greatest and most legendary missions. This episode is a mashup of S03E05 and S01E06

  • SPECIAL 0x6 Mars' Greatest Mysteries

    • November 20, 2017
    • Science Channel

    This episode is a mashup of two other Science Channel shows: "Mars; The Secret Science", S01E01, "Race to the Red Planet" and "How the Universe Works", S05E07, "Life & Death on the Red Planet"

  • SPECIAL 0x7 Search for Alien Life

    • November 27, 2017
    • Science Channel

    This episode is a mashup of "Space's Deepest Secrets", S02E09, "Stranger Signals from Alien Worlds" and another Science Channel special, "Search for Alien Planets".

  • SPECIAL 0x8 When Space Attacks

    • December 4, 2017
    • Science Channel

    This episode is a mashup of "Space's Deepest Secrets", S03E02, "When Meteors Attack" and "How the Universe Works", S05E06, "The Universe's Deadliest".

  • SPECIAL 0x9 Mysteries of the Big Bang

    • December 11, 2017
    • Science Channel

    New discoveries uncover the true story of the universe's creation. This episode is a mashup of "Space's Deepest Secrets", S02E10, "Secret History of the Big Bang" and S01E08, "Quest for the First Star".

  • SPECIAL 0x10 Secret History of Dark Matter

    • December 18, 2017
    • Science Channel

    New discoveries shed new light on dark matter, one of the universe's biggest mysteries. This episode is a mashup of "Space's Deepest Secrets", S02E06, “Curse of Dark Matter” and another Science Channel show “How the Universe Works”, S05E08, “The Dark Matter Enigma”.

  • SPECIAL 0x11 Curse of the Hell Stars

    • May 7, 2018
    • Science Channel

    This episode is a mashup of "Space's Deepest Secrets", S02E08, "Rise of the Monster Stars" and "How the Universe Works", S05E05, "Stars That Kill".

  • SPECIAL 0x12 Big Bang: The Dark Secrets

    • May 14, 2018
    • Science Channel

    This episode is a mashup of S02E10, "Secret History of the Big Bang" and S01E08, "Quest for the First Star".

  • SPECIAL 0x13 Secrets of Alien Universes

    • May 21, 2018
    • Science Channel

    This episode is a mashup of S04E01, "The Time Travel Enigma" and S01E12, "The Truth Behind Parallel Universes".

  • SPECIAL 0x14 Rise of the Red Planet

    • June 4, 2018
    • Science Channel

    This episode is a mashup of "Space's Deepest Secrets", S04E02, "Mission to the Red Planet" and "How the Universe Works", S05E07, "Life & Death on the Red Planet".

  • SPECIAL 0x15 The Universe's Most Unknown

    • June 11, 2018
    • Science Channel

    This episode is a mashup of S04E03, "Hunt for the Edge of the Universe" and S03E01, "Hunt for the Hidden Cosmos".

  • SPECIAL 0x16 Hunt for Alien Worlds

    • June 18, 2018
    • Science Channel

    New discoveries uncover the secrets of the universe's strange alien worlds that could be home to extraterrestrial life. This special consists entirely of segments previously aired as part of the Space's Deepest Secrets episode "Journey to Alien Earths" (Season 4, Episode 4) and the How the Universe Works episode "Strangest Alien Worlds" (Season 5, Episode 8).

  • SPECIAL 0x17 Black Holes of Doom

    • June 25, 2018
    • Science Channel

    This episode is a mashup of S04E05, "Wrath of the Black Hole" and S02E03, "Black Holes: The Einstein Prophecy".

  • SPECIAL 0x18 Mysteries on the Moon

    • July 2, 2018
    • Science Channel

    This episode is a mashup of "Space's Deepest Secrets", S04E06, "New Race to the Moon" and "How the Universe Works", S04E06, "Secret History of the Moon".

  • SPECIAL 0x19 Mars' Darkest Secrets

    • July 9, 2018
    • Science Channel

    New discoveries reveal the mysteries and dangers on Mars, and if the planet is ready to support a human civilization. This special consists entirely of segments previously aired as part of the Space's Deepest Secrets episodes "Mission to the Red Planet"" (Season 4, Episode 2) and "Mars: The Next Frontier" (Season 4, Episode 7) and the Strip the Cosmos episode "Expedition Mars" (Season 1, Episode 4).

  • SPECIAL 0x20 Curse of Jupiter

    • July 16, 2018
    • Science Channel

    This episode is a mashup of S04E08, "Secret History of the Juno Mission" and S02E04, "Secret History of Jupiter".

  • SPECIAL 0x21 Mysteries of the Sun

    • July 23, 2018
    • Science Channel

    New discoveries reveal the dark power of the Sun and how its strange behavior affects life on Earth.

  • SPECIAL 0x22 Asteroids of Doom

    • July 30, 2018
    • Science Channel

    New discoveries reveal the dangers that asteroids pose to planet Earth, but also that these rocky worlds could be the next destination for human space colonization. This episode is a mashup of TBD and "How the Universe Works", S06E09, "War on Asteroids".

  • SPECIAL 0x23 NASA's Greatest Discoveries

    • October 13, 2018
    • Science Channel

    NASA's Voyager, Cassini, and Juno missions are groundbreaking scientific feats that changed everything we know about our universe, and testimony from the modern-day explorers behind these expeditions reveal the incredible secrets they discovered. This special consists entirely of segments previously aired as part of the Space's Deepest Secrets episodes "Secret History of the Voyager Mission" (Season 1, Episode 5), "Cassini′s Grand Finale" (Season 3, Episode 5) and "Secret History of the Juno Mission" (Season 4, Episode 8).

  • SPECIAL 0x24 Mysteries on Alien Earths

    • October 15, 2018
    • Science Channel

    Experts are discovering new Earth-like planets all over our universe, and using the latest science, they investigate the secrets of these strange worlds that could be homes for extraterrestrial life. This special consists entirely of segments previously aired as part of the Space's Deepest Secrets episodes "Search for Alien Earths" (Season 3, Episode 4) and "Journey to Alien Earths" (Season 4, Episode 4).

  • SPECIAL 0x25 Strangest Alien Stars

    • October 22, 2018
    • Science Channel

    New technology helps experts make startling discoveries about the origins of the universe's stars, revealing the secrets of how they transformed the cosmos. This special consists entirely of segments previously aired as part of the How the Universe Works episode "Extreme Stars" (Season 1, Episode 4) and the Space's Deepest Secrets episode "Quest for the First Star" (Season 1, Episode 8).

  • SPECIAL 0x26 NASA's Mission to Jupiter

    • October 29, 2018
    • Science Channel

    Cutting-edge technology developed at NASA reveals the hidden secrets and strange phenomena on the solar system's biggest planet, Jupiter.

  • SPECIAL 0x27 Monster Black Holes: Hawking's Giants

    • March 11, 2019
    • Science Channel

    Stephen Hawking changed everything we know about black holes, but even today, scientists don't know how the very biggest were formed. Now, new discoveries might finally solve the mystery of supermassive black holes and reveal the secrets of our galaxy.

  • SPECIAL 0x28 Alien Earths: The New Secrets

    • July 22, 2019
    • Science Channel

    This episode is a mashup of S06E02, "Secrets of the Seven Earths", and S06E04, "Finding Alien Moons".