Season 2 Episode
- Season 2 Earth: The Secret History
- Season 2 Alien Planets: Cosmic Nightmares
- Season 2 Milky Way: The Monster Inside
- Season 2 Ends of the Solar System: Strange Frontiers
- Season 2 Ice Giants: The Frozen Aliens
- Season 2 Alien Galaxies: The Strange Secrets
- Season 2 Mercury: The Cursed Planet
- Season 2 Comets: Mysteries from the Deep
- Season 2 The Sun: Secrets of Our Star
- Season 2 The Solar System: Alien Origins
- Season 2 Dwarf Planets: Aliens Among Us
- Season 2 Alien Stars: Mystery of the Monsters
- Season 2 Alien Volcanoes: Life in Hell
- Season 2 Alien Moons: The Next Earth
- Season 2 Alien Oceans: Search for Life
The Planets and Beyond - Season 2 Episode 8 Comets: Mysteries from the Deep
8.17 43 minutes Astronaut Mike Massimino reveals the alien secrets of comets, strange visitors from deep space that might be responsible for life on Earth.
