"All I ever do is hurt people," Sam agreed, "It's all I've ever done. Maybe all I can do. But I didn't want to hurt Harry. I wanted to save him."

He had to smile at that, in the way that brought tears to his eyes again. Instead of engaging with that, he looked at his watch once more, then back at Harry. "You get an injection once every hour. Eight in total. Purified blood, since I've just confessed. Demon curing ritual."

Figured that Harry would be too insignificant to know about these things. "It's what happened to Aleister."