In other words, months before The War Games, The Mind Robber has quietly given us an origin story for the Doctor that is almost, but not quite, what we eventually get from the later "official" version. (After all, it is not as though no writer in the first six years had a guess on where the Doctor came from. If I could dig up David Whitaker and ask him one question, in fact, it would be what he thought the Doctor's origin was.) The Doctor fled from a position of responsibility, stole a spaceship (or, in this case, storytelling medium), and ran off to have adventures. Except that instead of being a Time Lord from Gallifrey, he is the designated Master of the Land of Fiction - the writer and creator of all stories. And he's gone on the run to live the stories instead of simply writing them.