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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 6 Episode 5
HD
Overview:
Stardate: 46154.2. Members of the crew are secretly abducted from the Enterprise to be used in bizarre experiments where they are dismembered and re-assembled without anyone’s knowledge – including their own. The only signs that anything is wrong is a strange form of tiredness and no recollection of having slept well the night before.