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Season 1 - Sep. 28, 1987
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Season 7 - Sep. 20, 1993

Star Trek: The Next Generation Season 2 Episode 18
HD
Overview:
Stardate: 42823.2. Picard must convince two dying civilizations that they must co-exist on the same planet to survive, however, they have other plans to ensure their survival: in the form of clones of the Enterprise crew.