There he stands amongst the graves of those who once were and no longer will be. He is their unknown guardian - even to himself - a lone man standing with Disappear as his death witness. What would somebody do if they knew every step was another progression in their own death march? With every breath, it is one less.
To say goodbye to the ones you love would be cruel and deceitful; after all your soul lives on - just not you. Instead, the lone man does the one act he has always known would destroy his hearts. He says goodbye to who he once was and what he was represented. A final farewell to the brilliant unknown alien; the mysterious Doctor who could love all but one, to the best friend who was forgotten with a touch of a hand, to the man who loved so much he died because he was not fire and ice but was brave.
It is the only act the man could do with what remained. The march continues on carrying him into the safety of his oldest companion. All he achieved and all he will achieve will continue beyond him - as it always has. Only this time he truly does not want to go. He does not look forward to the unknown. Yet not even the man standing alone amongst the dead gets what he wants.
Instead with arms open and eyes burning he begins again, a new - alone.