Stike
Group Marshall Stike fought in the Ninth Sontaran Battle Fleet on the Madillion Cluster. He joined his subordinate Major Varl in Seville where together, they worked with Dastari towards putting together a laboratory where Dastari could work towards perfecting the Kartz-Reimer module, a crude prototype space-time vessel to assist (as ever) in defeating the Rutans in the endless Sontaran-Rutan War. To this end, the two Sontarans had captured the second incarnation of the Doctor and kept him in the cellar of a mansion. In particular, they wished to find about the Doctor's Rassilon Imprimatur and enable the Kartz-Reimer module to work.
The long-suffering Stike first got stabbed in the leg by Jamie McCrimmon, attacked by coronic acid, and finally blown up by the time vessel, which the sixth incarnation of the Doctor had sabotaged. (DW: The Two Doctors).