As our initial discussion of frozen tundras suggests, we recorded this one a while ago, which, yes, sorry about that. But hey, this is pretty timeless stuff! (We think. It's been a while.) All of our wonderful listeners have filled our inbox to the brim, so we take another hour and read through your missives. We ponder a thought experiment in which the 10th and 11th Doctors swap regeneration stories. We assess how much Gallifrey really played into the 12th Doctor's story. We consider a frankly brilliant idea for a regeneration where you don't know who the new Doctor is. And we close with a wonderfully bonkers plan to reveal the true identity of Bradley Walsh's new companion.