Beasts of the Past by luckbringer [Reviews - 1]
The Doctor and Clara take a break from their search for Gallifrey to follow a suspicious asteroid heading for Earth...only to be hijacked by an intergalactic pest! But this creature means more to the Doctor than he knows, and he realizes that the universe has begun to move on from the terrible events of the Time War. Should the Doctor be doing the same?
Characters: Clara Oswin Oswald, The Doctor (12th)
Series: Beasts of the Past Story Arc