Yeah by now it's pretty obvious your knowledge of how British TV works is pretty non existent.
It averaged around 10m for each of its three series and won lots of awards, that doesn't happen often. He already had a good reputation but that opens a lot of doors.
And he had already created and been the main writer of a drama series before his Who work came along.
My knowledge is far from non-existent ta. I just don’t go in for the hyperbole of ‘most sought after’ nor indeed the idea that the move to Sunday evening was actually a great thing.