He appears to simply no longer be within the TARDIS.
There is, however, a new occupant. A small, brown kitten. Some of you may have seen this kitten before, others may not.
He doesn't appear to be very amused.
[OOC: The sad of the last couple of days has finally eaten up the Doctor, and he's succumbed to the TM curse. Again. Goddamnit, Ten. You silly emo pup. He'll be a kitten for the next couple of days. All threads with him for the TM verse will be slowtimed as I attempt to keep him from scratching furniture.]