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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
Season 6 - Sep. 21, 1992
Season 7 - Sep. 20, 1993
Star Trek: The Next Generation Season 5 Episode 4
HD
Overview:
Stardate: 45122.3. Picard attempts communications with the Crystalline Entity – a life form responsible for hundreds of deaths throughout the Alpha Quadrant. However, a scientist on board the Enterprise has plans of revenge over the death of her only son at the hands of the Entity.