Well, I can't say anything about the entire third season. The thing is, the show stopped airing for summer over here right when George's father died. That was episode 12 and I tried so hard to dodge the spoilers and all. I finally found this awesome site and I must admit I watched episodes 13-17 today.
Seriously? Seriously! I am usually not the most emotional person but I was sobbing at the end of episode 17. MOst of all because of seeing Denny again and that moment of him almost touching Izzy. I just lost a family member and this was quite an emotional one for me but I loved the way they were dealing with it all. From the short episode recaps I saw I expected some of the usual "afterlife scenarios" but there were quite a few twists I enjoyed.
I know bits and pieces of what is to come and well, I can't wait to really SEE it and not just read about it. So far, I really like the season.