With no explanation for how or why, Dean and Sam find themselves with a fallen angel on their hands.

Everyone needs to have faith in something, or in Dean's case... someone. Dean needs for Cas to stay as he is, because he's the only thing Dean belives in right now. Cas can't keep doing what he's doing. Dean thinks he'll fall apart if he does. Spoilers

With everything that was going wrong in Dean's life, it took him a while to realize that the person close to him that really needed the most help was Castiel.

Slash... Just how I think the movie should have ended, the conversation between Zoe and Drake largely different...

Based on the movie Hannibal Rising. Possible slash depending on how you look at it, I personally like to see it but hey... If more follows though it definately will be! Hannibal Lecter and Pascal Popil have a brief interlude.