[s2e1] Sins Of The Father -

In the Star Trek: The Next Generation episode " Sins of the Father ," Worf discovers his brother, Commander Kurn, has arrived with news that their deceased father, Mogh, has been falsely accused of treason by the Klingon High Council. Worf travels to Qo'noS to fight the charges, discovering that Duras, the true culprit's son, is behind the plot to ruin his family name. To prevent a civil war that would destroy the empire, Worf is forced to accept public disgrace, allowing Duras to frame his innocent father.