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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 24
HD
Overview:
Stardate: 46915.2. Riker discovers that eight years ago, an exact clone of him was created when he beamed through a planet’s surface while returning to his starship. This clone, named Thomas Riker, has secretly remained on the planet for the past eight years, and still has romantic feelings for Troi.