3.17 Sins of the Father

The Enterprise receives a Klingon first officer on the Federation exchange program who is actually Worf's brother. When Worf learns that their father has been charged with betraying the Khitomer Outpost, he sets off on a mission to clear his family name.

Sins of the Father
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TNG Season 3, Episode 17

Ronald D Moore, W. Reed Moran and Drew Deighan
Les Landau

First Aired Mar 19, 1990
Stardate 43685.2