Skree

Lieutenant Skree was the operations officer on board General Staal's Sontaran Warship in 2009. 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) Skree like most of his fellows apart from General Staal was identical to Commander Skorr.