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Earth: The Secret History

Episode number: 1

Overview: 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.

Alien Planets: Cosmic Nightmares

Episode number: 2

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

Milky Way: The Monster Inside

Episode number: 3

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

Ends of the Solar System: Strange Frontiers

Episode number: 4

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

Ice Giants: The Frozen Aliens

Episode number: 5

Overview: 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.

Alien Galaxies: The Strange Secrets

Episode number: 6

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

Mercury: The Cursed Planet

Episode number: 7

Overview: 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.

Comets: Mysteries from the Deep

Episode number: 8

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

The Sun: Secrets of Our Star

Episode number: 9

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

The Solar System: Alien Origins

Episode number: 10

Overview: 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.

Dwarf Planets: Aliens Among Us

Episode number: 11

Overview: 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.

Alien Stars: Mystery of the Monsters

Episode number: 12

Overview: 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.

Alien Volcanoes: Life in Hell

Episode number: 13

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

Alien Moons: The Next Earth

Episode number: 14

Overview: 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.

Alien Oceans: Search for Life

Episode number: 15

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