*But, since I covered the bottom of the screen when they listed the guest stars...*

Haha! Sweety, you never fail to amuse me! Loved your review, as always!

I kinda loved Dean in Purgatory. I'm not spoiled, but I think maybe it gave Dean an option. If they fail to remove the Mark and it starts to overwhelm him, I can see Dean returning to Purgatory - a place where he can safely surrender control without casualties.

*This doesn't look like a lot of blood. Not enough to almost kill Sam, anyway*

I'm thinking the box absorbed the blood. See those three little blood trails in your cap? They are leading up into the box.