Introduced on Star Trek: The Next Generation, the Duras sisters became a thorn in the side of Captain Jean-Luc Picard (Patrick Stewart) and the United Federation of Planets. Lursa (Barbara March) and B'Etor (Gwynyth Walsh) Duras made their debut in Tng's "Redemption" two-parter that bridged seasons 4 and 5. Their brother, Duras (Patrick Massett), had already appeared as an enemy of Lt. Worf (Michael Dorn) in a couple of Tng episodes. Although the House of Duras held sway within the Klingon Empire, they gained notoriety for their dishonorable tactics.

Ja'rod, the father of Duras, Lursa, and B'Etor, betrayed the Klingons by providing the Romulans with the means to attack the Klingon colony on Khitomer. This resulted in the Khitomer Massacre and the deaths of 4,000 Klingon colonists. Although the Klingon High Council learned of Ja'rod's duplicity, they allowed Worf's father Mogh to take the blame to avoid a Klingon civil war. The Duras...