In the mirror universe, Lieutenant Commander Stephen Klisiewicz was a Terran male who served in the Imperial Starfleet of the Terran Empire during the 23rd century. In 2277, Klisiewicz served as the first officer of the ISS Endeavour and was described as a very by-the-book officer. At this time, he was responsible for disciplining several crewmembers who questioned the authority of Captain Zhao Sheng. Later, he helped hide the activation of the ship's weapons during its attack run on Imperial Starbase 47. (VAN - Mirror Universe short story: "The Black Flag")