The BBC confirmed that after Season Four, the show will take a one-year break to allow Tennant the time to go do the Shakespeare thing. There will be three 90 minute specials starring Tennant's Doctor during this year gap, and RTD is writing all three. Then, Season Five will start back up again the next year in full force. No word on whether it will be Tennant or the next Doctor.

I've heard about the Davison thing, but I'll believe it when I see it.

Had NOT heard about the Brigadier/UNIT storyline. But, if they do it, I'll be all the fuck over it...