Cats and Dogs (short story)

Summary
I knew it would be a weird day when my cat, Biggles, started talking to me.

Apparently he isn't really a cat. Apparently he's an alien from across the universe, trapped in a cat's body. And, apparently, he's looking for a man called the Doctor.

Characters

 * Tenth Doctor
 * Martha Jones
 * Biggles
 * Sampson
 * Mary
 * The Ageless

Continuity
to be added