Sontaran Special Space Service

The Sontaran Special Space Service was a branch of the Sontaran armed forces. It consisted of special forces troops that were deployed for operations requiring specialist talents. One such operation was the planned Sontaran Invasion of Gallifrey. A Special Space Service unit under Commander Stor was to seize the Capitol and widen the gap in the Transduction Barrier, allowing the rest of his battle fleet to land. Though there were only a handful of Sontarans, they were more than a match for the Gallifreyan security forces and their allies, as both stasers and K9's blaster were ineffective against the Sontaran armor. The invasion failed when Stor and is remaining troopers were killed by the DeMat Gun wielded by The Doctor. (DW: The Invasion of Time)