Board Thread:The Panopticon/@comment-24894325-20170121220436/@comment-24894325-20170124194041

The Pilot maybe either the Doctor piloting his own TARDIS or somebody else piloting the Doctor's TARDIS after gaining control over it. However, the latter would have been so narratively significant that it would have to be explicitly explained.

If it helps the stubborn part, the Pilot is not his name but a nickname given to him by Lolita. If Time Lords personalize their TARDISes by calling them the Ship, or Old Girl, so can a TARDIS personalize a Time Lord.