The Planets and Beyond
Season 1, Episode 5: Planet 9: The Lost World
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Astronaut Mike Massimino investigates the possibility of a giant ninth planet at the edge of the solar system; using the latest technology, he reveals the incredible secrets of this mysterious world.
All Episodes - Season 1
Episode 1
Jupiter: King of the Planets
Episode 2
Mars: The Definitive Guide
Episode 3
Venus: The Hell Planet
Episode 4
Saturn: Mysteries Among the Rings
Episode 5
Planet 9: The Lost World
Episode 6
Pluto: The Secret Science
Episode 7
Alien Worlds: Stranger Than Fiction
Episode 8
The Moon: Earth's Guardian Angel