Probably the thing I'm most curious about, and looking forward to in "Death of the Doctor". I have a feeling that this time it might get played for laughs. We've had the emotional reunion in "School Reunion" which was probably one of the best moments of the series to date. But I can see this time round it might be a bit sillier. I reckon something like they'll run into each other in the middle of whatever adventure they are both having. He'll just say "Sarah! What are you doing here!" and she'll say "Who are you?" and he'll say "Oh Sarah don't be stupid, it's me!" and that'll be it.