Star Trek: 10 Things You Didn’t Know About The Duras Sisters

10. The Romulan Connection

The family's dark association with the Romulans stretches back to the Khitomer Massacre where Ja'rod, father of Lursa and B'Etor, would meet his end alongside Mogh, father of Worf.

Ja'rod provided the defence codes to the Romulans. The evidence of a traitor would take many years to finally appear. Due to the family's prominence in the Empire, his misdemeanors were covered up, leading to the dishonouring of Worf and the House of Mogh. This was in an attempt to stop a civil war from erupting however once Gowron was installed as Chancellor the stability of the Empire fell apart.

That war would lead to the House of Duras taking on Gowron, secretly backed by the Romulans and more specifically Commander Sela, daughter of one Tasha Yar. 

Ironically both on this occasion and in Generations the sisters of Duras would find their plans foiled by the interference of a certain android from a certain Federation flagship. In Redemption this would be through Data's choice to not follow orders and reveal the presence of the Romulan fleet while in Generations he was responsible for jury-rigging the Enterprise so that they could order the sisters' Bird of Prey to cloak and lower its shields. Mr Data...nicely done.