I think One identifies himself as "the first. The original, you might say" in The Five Doctors, but that's all that springs to mind.I've just watched the final scene again and I have a question, if anyone knows... Clara explicitely tells the Doctor "You're the eleventh Doctor". I know the "11" motif has been used since Matt Smith took over, and of course calling him "the eleventh Doctor" is very common among fans, but I have the impression that it's quite rare in the show itself. Has it happened before, someone calling the Doctor "the nth Doctor"?