Dating an atmos clock
(PROSE: Timewyrm: Revelation) Travelling through the caves of the Death Zone to save Borusa from the Dark Tower, the War Doctor and Cinder found various cave paintings that depicted the Doctor throughout his life; the War Doctor noticed one of "a lanky man in a blue suit", and recognised it as one of his future incarnations.(PROSE: Engines of War) When the Ninth Doctor answered a call from Mickey Smith in San Francisco, he was told that the phone call was meant for "the other one", and quickly deduced that Mickey was talking about his next incarnation.He met his eventual end after he absorbed a huge quantity of nuclear radiation whilst saving the life of Donna Noble's grandfather, Wilfred Mott.
The forces of the time vortex began to destroy every cell in his body, and he had to regenerate to save his life.(TV: The Christmas Invasion) The Doctor lost his TARDIS on Serac to a Sontaran squad, led by Snathe.Trying to get his ship back, the Doctor allied with his old enemies on their mission to locate Thanatos the Worldbane, the greatest super-weapon in creation.When traveling without companions, the weight of being the last Time Lord became much more pronounced.If prodded too much, he would erupt in an almost righteous sense of fury.