Roger, in the new series of Doctor Who, the Master had transformed himself into a human (by placing his Time-Lordiness into a fob watch) and forgotten that he was the Master or a Time Lord.
Here's the big question: do you have a fob watch that has been with you for as long as you can remember but that you have never opened? You might be the Master without realising. (If you are, DON'T OPEN THE WATCH!)