Well, what can I say. Very little compared to what has been said before. This was a very best series finale. It went from making me laugh out loud to making me want to cry.
The thing I love about the Supernatural series is the fact that they don't feel the need for bigger and better special effects as they build up to their finales. Don't get me wrong, the special effects are top-notch. But it seems that Kripke and co. depend more on plot and story to sell their series.
This is, of course, absolutely fine. In fact, it's better then fine. It's the way it's supposed to be. Please Kripke and co. talk to Micheal Bay, you could probably point out to him what's wrong with Transformers 2. Always before, Hollywood has relied on increasing special effects to sell their ongoing story lines. Supernatural does not do that, but increases it's storyline instead, and this finale proves it.
Right now, I think Kipke and co. could teach Hollywood a very big lesson (take a look between MIB and MIB2). All I can say, is thank you Kripke and co. you've done us all proud. You've taken us out of the range of idiots to the intelligent audience again. And I know, I'm reviewing the finale of the fifth series before it even comes out here in the UK, but I'm not sharing it, and I will damn well buy the box set when it comes out, so that negates any indiscretion. I know your doing a sixth series, I hope to heaven and hell that your keep the same philosophy in story telling, though I'm sure you will.