It slams into him, even though he knows what Andrew's doing -- hell, he's even using the same words, and Sam's sure deep down that he's doing it deliberately.

But what Andrew doesn't know, can't possibly know, is that there's something else, too.

"Looks like I was right... Andy's a killer after all."

"No, he's a hero. He saved his girlfriend's life, he saved my life."

"Bottom line, Dean-- last night, he wasted somebody."

"What's your point, Sam?"

"Right circumstances, everyone's capable of murder. Everyone."

He looks down and away, back at the book, and doesn't say a word.