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Season 1 - Sep. 28, 1987
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Season 3 - Sep. 25, 1989
Season 4 - Sep. 24, 1990
Season 5 - Sep. 23, 1991
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Season 7 - Sep. 20, 1993
Star Trek: The Next Generation Season 4 Episode 15
HD
Overview:
Riker is abducted by a xenophobic race of aliens during a first contact mission. They believe the Enterprise is a scout for an invasion.