Alpha (The Evil of the Daleks)

Alpha was a genetically altered Dalek, created by the Doctor. He isolated the Human Factor from Jamie McCrimmon and implanted it in three Daleks. If he hadn't done this the Daleks would have destroyed the TARDIS. (DW: The Evil of the Daleks)

Alpha later lead a group of survivors of the Dalek civil war to a distant planet where they survived and bred. However they were manipulated by Kata Phobus a telepathic parasite and destroyed themselves to prevent it from feeding off of them. (DWM: Children of the Revolution)