Declan Keogh

Declan Keogh was a supporting character first introduced in the Star Trek: Deep Space Nine episode The Jem'Hadar. He was portrayed by . 
By the 2340s Keogh was a Federation Starfleet officer, and security chief on the USS Lexington. A hard partying womanizer during that time, Keogh came to strongly dislike Curzon Dax. After being too hung over to participate in an away mission he sent his assistant security chief in his stead. Tragically that assistant and the entire team were killed in that mission. This led Keogh to decide that he needed to shape up, and he became a much more serious officer. During the 2350s Keogh was married, however that marriage had ended prior to 2370.
After Jean-Luc Picard - who had been briefly considered for command of the USS Odyssey - was instead given command of the Enterprise, Keogh was named Captain of the Odyssey in 2365. Keogh was noted as a difficult Captain to work for, with none of his first officers lasting more than six months in the job. His final first officer was Lieutenant Commander Joseph Shabalala.
When the Odyssey arrived at Deep Space Nine in 2370 to assist with setting up a farming colony in the Bajoran system Keogh and Shabalala met with Commander Benjamin Sisko. After Sisko requested raktajino Keogh remarked that the drinking the Klingon coffee was like drinking an oil slick, to which Shabalala added without the tangy aftertaste, causing Sisko to laugh.
Later in 2370 Captain Keogh and the Odyssey arrived at Deep Space Nine, only to learn that Sisko had been kidnapped by the Jem'Hadar and the Dominion while on a trip to the Gamma Quadrant. Unloading most of the Odyssey crew on to the station he led a mission to rescue Sisko. During the battle that ensued between the Federation and Dominion forces, the Odyssey took a direct hit to one of her warp nacelles and was unable to go to warp. As the Starfleet forces began their retreat, a Jem'Hadar ship rammed the Odysssey's secondary hull. Captain Keogh and his crew died a few minutes later as the Odyssey exploded, making them the first of many Starfleet personnel to die in battle against the Dominion. 
Captain Keogh's sacrifice did allow for the successful retrieval of Sisko, who returned to Starfleet and became critical in defeating the Dominion in the war between the two galactic powers. 
==Trivia==
* Having Keogh die and his Galaxy-class ship be destroyed was a deliberate choice for DS9 producers, who wanted to graphically demonstrate how much of a threat the Dominion was, and that the Enterprise would have just as easily been destroyed had she been present.
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