Star Trek: Deep Space Nine: Season 5, Episode 19

5 - 19: Ties of Blood and Water

Takeny Ghemor, who considers Kira to be his daughter, arrives on DS9 and confesses that is dying. Ghemor wishes to commence the Shri-tal with Kira, a Cardassian ritual in which a dying person reveals their closest secrets to the rest of the family. But the experience dredges up Kira's memories of her own father, who suffered a fatal injury during the Occupation of Bajor.