Drachee

The Drachee were an imp-like species with mind control abilities. They were the children of the living moon Erys.

A group of them kidnapped the Sixth Doctor's companion Flip Jackson from the TARDIS. The Doctor tracked down Flip, helped heal the mentally damaged Erys, and convinced it to let its children leave and explore the universe on their own. (AUDIO: The Brood of Erys)