I had no idea that everyone was coming back - I get very spoilerphobic during the run - so my biggest fear for S4 was what they might do to Donna.

And we all know how that turned out :-(

I think that I'd be less nervous if there hadn't been this big break, oddly. I still can't put into words why the big break has made me nervous for the new season because it's irrational, but there you go.