Why is it that we have to have this continuing theme that someone might be somebody else?
I mean how often has that actually happened since 2005?
Face of Boe hinted at being Jack... Not confirmed since
Derek Jacobi's professor turns out to be the Master (in the same episode)
Let's face it, the whole 'this character is really that character' doesn't really happen does it?
River Song was always a mystery, left up in the air up until a few weeks ago. She wasn't a character who turned out to be a different character.
Why are we so obsessed with the idea that a character is really someone else? where has it come from?