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- 1Earth The Secret HistoryMarch 20, 2018 · 8.5
- 2Alien Planets Cosmic NightmaresMarch 27, 2018 · 8.5
- 3Milky Way The Monster InsideApril 3, 2018 · 8.3
- 4Ends of the Solar System Strange FrontiersApril 10, 2018 · 8.0
- 5Ice Giants The Frozen AliensApril 17, 2018 · 8.3
- 6Alien Galaxies The Strange SecretsJuly 24, 2018 · 7.8
- 7Mercury The Cursed PlanetJuly 31, 2018 · 6.4
- 8Comets Mysteries from the DeepAugust 7, 2018 · 7.8
- 9The Sun Secrets of Our StarAugust 14, 2018 · 7.5
- 10The Solar System Alien OriginsAugust 21, 2018 · 6.5
- 11Dwarf Planets Aliens Among UsAugust 28, 2018 · 7.3
- 12Alien Stars Mystery of the MonstersSeptember 4, 2018 · 6.3
- 13Alien Volcanoes Life in HellSeptember 11, 2018 · 7.3
- 14Alien Moons The Next EarthSeptember 18, 2018 · 7.0
- 15Alien Oceans Search for LifeSeptember 25, 2018 · 8.5