New discoveries reveal the secrets of the most distant and mysterious worlds in the solar system. This episode of is a mashup of "How the Universe Works" S05E03 "Secret History of Pluto" and S05E01 "Mystery of Planet 9."
Cast Appearances
Mike Rowe
voices Himself (Narrator)Episode Discussion
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Retitled, this episode re-aired on 12/17/2018 at 2100 as "Pluto & Beyond: The Alien Mysteries" with a summar of "New findings reveal the secrets of the mysterious worlds at the edge of our solar system."