Sam couldn't have been more than five when he started asking questions. How come they didn't have a mom, why'd they always have to move around, where'd Dad go when he'd take off for days at a time? Dean had begged him, "Quit asking, Sammy. Man, you don't want to know."

Sam had to hold his brother as he died, had to carry his brother to that bed as his heart broke. But this isn't the first time he's had to do that. This isn't new.