Air date: 2018-03-20

Runtime: 43 min

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.

Air date: 2018-03-27

Runtime: 43 min

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

Air date: 2018-04-03

Runtime: 43 min

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

Air date: 2018-04-10

Runtime: 43 min

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

Air date: 2018-04-17

Runtime: 43 min

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.

Air date: 2018-07-24

Runtime: 43 min

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

Air date: 2018-07-31

Runtime: 43 min

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.

Air date: 2018-08-07

Runtime: 43 min

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

Air date: 2018-08-14

Runtime: 43 min

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

Air date: 2018-08-21

Runtime: 43 min

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.

Air date: 2018-08-28

Runtime: 43 min

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.

Air date: 2018-09-04

Runtime: 43 min

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.

Air date: 2018-09-11

Runtime: 43 min

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

Air date: 2018-09-18

Runtime: 43 min

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.

Air date: 2018-09-25

Runtime: 43 min

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