If current server doesn't work please try other servers below.
Season 1 - Sep. 28, 1987
Season 2 - Nov. 21, 1988
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 20
HD
Overview:
Stardate: 45733.6. Deanna’s mother pays a surprise visit to the Enterprise with even more surprising news: she plans to marry a man she has never met. After destroying an asteroid, the ship becomes infected with parasites that eat away at the ship’s hull.