Duras, son of Toral, was a Klingon soldier and commanding officer of the IKS Bortas in 2152.
In that year, Duras was commanded to locate and retrieve a group of rebels which had fled the Klingon protectorate at Raatooras, but was prevented from doing so by the intervention of Captain Jonathan Archer of Enterprise NX-01. For his failure to apprehend the rebels, Duras was demoted from captain to second weapons officer and assigned to the Ty'Gokor defense perimeter. Later, at a tribunal being held to determine the disposition of Archer for his role in assisting the rebels, Duras distorted the truth during his testimony, claiming that Archer was the aggressor in the conflict, and that he was attempting to instigate a rebellion against the Klingon Empire. Archer was eventually condemned to a life sentence on the penal colony Rura Penthe, although he was subsequently able to escape. (ENT: "Judgment")
Later that year, after the failure of a Tellarite bounty hunter to re-capture Archer, Duras was granted command of a Bird-of-Prey by the Klingon High Council for the purpose of apprehending Archer. Duras attempted to ambush Enterprise as it returned to the Sol system in the wake of a devastating attack on Earth, but was driven away by the intervention of three Earth starships which arrived to assist Enterprise. Duras later attacked Enterprise en route to Vulcan, but found himself unprepared for a series of upgrades Enterprise had received in preparation for its impending mission into the Delphic Expanse, including enhanced hull plating and the installation of photonic torpedoes. (ENT: "Bounty", "The Expanse")
Duras' next attempt to capture Archer occurred seven weeks later, as Enterprise was traversing the perimeter of thermobaric clouds surrounding the Expanse. Along with two other Birds-of-Prey, Duras attacked Enterprise within the clouds, but was eventually abandoned by the other ships, whose crews were unwilling to enter the Expanse. Unable to penetrate Duras' focused shields with their photonic torpedoes, Archer had his helmsman, Travis Mayweather, execute an L-4 maneuver to approach the Bird-of-Prey from aft, where Duras' shields were weakest. Duras was killed when Archer had his tactical officer fire a series of torpedoes, destroying the Bird-of-Prey. (ENT: "The Expanse")
