Pureblood (comic story)

Summary
Despite a satellite defense system programmed to block out any Rutan electrical signatures, an alien fleet has managed to attack and destroy the Sontaran homeworld. Marshal Stave evacuates with the Sontaran racepool and takes it to the Lauren Corporation's genetic research facility, in orbit around the planet Pandora, to breed a new generation of Sontaran warriors. The Doctor and Benny show up just in time to be taken prisoner with the rest of the station's crew, but when the Sontaran's geneticist is killed in a freak accident, Stave is forced to turn to the humans for assistance. The Doctor discovers that one of the "humans" is a Rutan agent in disguise, but convinces Stave to interrogate the Rutan rather than killing him outright. The Rutan reveals that a survey team recently located an ancient colony of Sontaran purebloods which had been cut off from the homeworld before the conflict with the Rutans began; they were able to convince the purebloods that the Sontarans had turned their back on its martial past and tainted their bloodline through cloning, and the outraged purebloods thus attacked and destroyed their "weakling" descendants.

The purebloods track down Stave's fleet and prepare to attack, but the Doctor convinces Stave to give him a chance to negotiate. He sends Benny to the brig to speak with the Rutan and takes the TARDIS to the fleet leader's ship. There, he shows Admiral Vorn a transmission from the station, and Vorn watches in horror as Benny tricks the Rutan into admitting that his species intends to wipe out the purebloods once they have destroyed the racepool and outlived their usefulness. Vorn contacts Stave, begs forgiveness and places his forces under Stave's command. In gratitude for the Doctor's services, Stave agrees to release his prisoners back to Terran space and to erase all knowledge of the human race from the racepool, sparing them the Sontarans' martial ambitions.

Characters
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Continuity
to be added