Skree

Lieutenant Skree of the Tenth Sontaran Battle Fleet was the operations officer on board General Staal's Sontaran Warship in 2009. He was identical in appearance to his superior, Commander Skorr. He was killed when Luke Rattigan activated his Atmospheric Converter on board the ship, destroying it. (DW: The Sontaran Stratagem/ The Poison Sky, REF: Doctor Who: Starships and Spacestations)