When Eccleston left the series was still new and they wanted to reassure people that his departure didn't mean the show was going down the tubes. Now we've seen that they can keep it up with a different Doctor there's no need to reveal anything and they're building suspense to increase viewership.

I don't necessarily think it's the Christmas episode that'll reveal who the new Doctor is, but I do think they're waiting for a specific strategic time, whatever it may be. Could be they're waiting till the end of ALL the special eps. Tennant will be in all of those, right?

How likely do you think it'll be Paterson Joseph?