New discoveries have experts on the hunt for extraterrestrial life in our solar system and elsewhere in the cosmos. This is a mashup of "Space's Deepest Secrets", S03E07, "Expedition Extraterrestrial" and S03E04, "Search for Alien Earths".
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******As of 12/11/17 this show has not aired! Last aired October 10, 2017 Season 3 Episode 8.*******