Last time we saw Dean and Sam they were living rather different lives, what with Dean being stuck in purgatory and all. Of course, they couldn't leave him there for too long, so they've brought him back to the land of the living just in time for Season 8. Sam's been getting on with his life: He has a girlfriend and a dog now y'see, but he's still delighted to see his brother. And sure isn't it only a matter of time before some loon ends up with the key to the gates of Hell, prompting the lads to spring back into action...