Star Trek: Deep Space Nine

Ties of Blood and Water (5x19)

Air date: Apr 14, 1997

Stardate: 50712.5 A Cardassian dissident opposed to the Cardassian/Dominion alliance asks Kira to pose as his daughter so that he may reveal his secrets to use against his enemies as is customary in his culture. Kira must overcome painful memories of her own father's death before she can face him and gain the information.