Special Assault Squad The Special Assault Squad was a division within the Sontaran Empire . It was charged with engaging in covert assaults and its soldiers were skilled in fighting behind enemy lines , making use of cloaking technology . Members of the Special Assault Squad were assigned to various Sontaran units , regiments and fleets , such as Commander Kaagh , who was assigned to the Tenth Sontaran Battle Fleet ( TV : " The Last Sontaran " ) and others like Commander Tarx and Commander Lohr . ( PROSE : " The Last Sontaran " ) When flagship of the Tenth Sontaran Battle Fleet was destroyed , ( TV : " The Poison Sky " ) Commander Kaagh , a member of the Special Assault Squad , crashed in his Pod onto the planet Earth . Despite damage to the ship and exposure to G - force which might have killed him , Kaagh survived , suffering a large scar down the right side of his face . Kaagh hoped that he could make up for his fleet ' s failure to conquer Earth . He began a covert attempt at destroying Earth and making himself a hero , " Kaagh the Avenger " , then " Kaagh the Destroyer " . To this end , he used a neural control implant on Professor Nicholas Skinner and his daughter Lucy , both of whom ran Tycho , a radio telescope nearby . Kaagh planned to use the telescope to bring down Earth ' s many orbital satellites in a coordinated attack on the planet ' s nuclear power plants . This would have rendered the planet uninhabitable . His plan was discovered by Sarah Jane , her son Luke and their friends Clyde and Maria . Kaagh attempted to kill her and her young friends whom he considered as " half - forms " . However before his plan could come to effect , Kaagh was attacked in his probic vent by Maria ' s mother , Chrissie , and forced to return home to Sontar in his scout - ship . ( TV : " The Last Sontaran " ) Too ashamed to return to Sontar , Kaagh began working as a mercenary for the Bane , who had found the consciousness of Horath and used Kaagh as a go - between for its transportation from planet to planet . A few weeks after this he met Mrs Wormwood , a member of the Bane family whom had been cast out for her actions . He found that there was a high price on her head , but she persuaded him to help her control the universe . They both plotted to become Emperors of the Galaxy . Mrs Wormwood travelled to Earth , closely followed by Kaagh , who came in during a siege by the Bane Kindred . He found Mrs Wormwood and killed her attackers . They then stole Luke and the Tunguska Scroll , which would show them where Horath was buried . Luke escaped , but Kaagh managed to catch him . However , Mrs Wormwood was growing tired of him . In the end , she offered Luke a place at her side and double - crossed Kaagh , calling him a blundering idiot . Eventually he saw the light and in a last ditch attempt at honour he threw himself and Mrs Wormwood into the portal to Horath ' s body . ( TV : " Enemy of the Bane " ) Equipment . Members of the Special Assault Squad had more advanced technology than normal Sontaran troops . They had smaller , more compact blaster weapons , which seemed to have different settings . They housed their guns in a pocket which was connected to a leg . They had automatic helmets that could retract into their armour and a personal cloaking field . They employed the use of neural implants , as opposed to the more common hypnosis methods Sontarans tended to use . They also used drones that resembled large plasmic spheres to act as scouts , but also had attacking ability . ( TV : " The Last Sontaran " ) Their communicators could be used to control their drones and Neural control implant s . ( TV : " The Last Sontaran " ) These communicators could also power other electronic weapons such as sonic disruptor s . ( TV : " Enemy of the Bane " ) They also were able to tell their Sontarans if there is someone on their ship . ( TV : " The Last Sontaran " )