It came to pass that the Doctor and all his selves traveled to the end of everything.

All there knew of the warrior, the ruler, the hero. Of his companions - the one who almost choked on a seed of evil and the one who grew old and gray. Of the evil Master, who sometimes joined the Doctor only to betray him.
He came to return the time travel stolen by Omega, for the cosmos no longer proved challenging.
"No," the last arrival brandished his umbrella at himselves, all facing him. "Somewhere, there's injustice! Elsewhere, tea is getting cold!"
Recognising a true hero, his other selves stole each other's Tardis, leaving for other universes to do doctoring in.