E1 - Earth: The Secret History

Aired: March 20, 2018

Astronaut Mike Massimino uses the latest science to reveal the strange secrets of planet earth, and explores whether alien earths exist elsewhere in the universe.

E2 - Alien Planets: Cosmic Nightmares

Aired: March 27, 2018

Astronaut Mike Massismino uncovers the violent secrets of the most deadly planets outside our solar system.

E3 - Milky Way: The Monster Inside

Aired: April 03, 2018

Astronaut Mike Massimino explores the dark secret of the Milky Way, the home to both Earth and a terrifying supermassive black hole.

E4 - Ends of the Solar System: Strange Frontiers

Aired: April 10, 2018

Astronaut Mike Massimino uses the latest NASA discoveries to explore the dark and mysterious frontiers of our solar system.

E5 - Ice Giants: The Frozen Aliens

Aired: April 17, 2018

Astronaut Mike Massimino journeys to Uranus and Neptune, the farthest planets from the sun and the home to some of the solar system's strangest mysteries.

E6 - Alien Galaxies: The Strange Secrets

Aired: July 24, 2018

Astronaut Mike Massimino explores the universe's strangest alien galaxies, strange places that could be home to extraterrestrial life and deadly supermassive black holes.

E7 - Mercury: The Cursed Planet

Aired: July 31, 2018

Astronaut Mike Massimino explores Mercury, a deadly and tiny planet that faces constant attacks from the Sun, and which might one day pose a threat to all life on Earth.

E8 - Comets: Mysteries from the Deep

Aired: August 07, 2018

Astronaut Mike Massimino reveals the alien secrets of comets, strange visitors from deep space that might be responsible for life on Earth.

E9 - The Sun: Secrets of Our Star

Aired: August 14, 2018

Astronaut Mike Massimino journeys to the sun, revealing the secrets of Earth's star and how it will one day destroy the planet.

E10 - The Solar System: Alien Origins

Aired: August 21, 2018

Astronaut Mike Massimino uncovers the strange and violent birth of the solar system, and reveals how its planets were built from the wreckage of bygone alien worlds.

E11 - Dwarf Planets: Aliens Among Us

Aired: August 28, 2018

Astronaut Mike Massimino explores dwarf planets, mysterious worlds like Pluto that are too small to be a planet, but are home to some of the universe's biggest secrets.

E12 - Alien Stars: Mystery of the Monsters

Aired: September 04, 2018

Astronaut Mike Massimino journeys to the deadliest stars in the universe, where terrifying suns can rip apart planets but may be integral to life on Earth.

E13 - Alien Volcanoes: Life in Hell

Aired: September 11, 2018

Astronaut Mike Massimino uses the latest science to explore the alien volcanoes of distant worlds and reveals if they are hotbeds for extraterrestrial life.

E14 - Alien Moons: The Next Earth

Aired: September 18, 2018

Astronaut Mike Massimino journeys to the alien moons of the solar system and discovers if these strange worlds could be habitable for life beyond Earth.

E15 - Alien Oceans: Search for Life

Aired: September 25, 2018

Astronaut Mike Massimino explores the mysterious oceans of the solar system, where the latest discoveries provide new clues in the search for alien life.