Fill your paper with the breathings of your heart. ~William Wordsworth

I don't even know what to think anymore. I definitely don't think it's Lucifer, if only because that's what everyone's expecting and I just can't see Show being that predictable. So I don't know if something's IN Sam, or if there's something NOT IN Sam, like his body made it to Earth but his soul or his conscience or something is still stuck in Hell. It would explain the emotional detachment, the apparent lack of love and concern for Dean (because we KNOW that shit ain't our Sammy), the downright morally bankrupt way he's been handling all their hunts lately... And he did ask for Cas' help when he first got back, but Cas didn't come. Maybe because he knows the part of Sam that really matters isn't in there? IDK, honestly. I'm just hoping we'll get a few answers next week.