Never-were

The Never-were were a race of humanoids that existed as an alternative reality that managed to invade the dreams and mind of Amy Pond whilst she was inside the TARDIS travelling through the vortex. They successfully managed to guide Amy into piloting the TARDIS to an alien planet were they intended to use Amy to destroy the Queen of an insect race that would prevent their world coming into existence but Amy’s will was too strong and she refused to kill an innocent creature. (DWA: Ghosts of the Never-were)