No one was speaking to John Winchester. He had said it was probably better that Sam had died rather than become what ever the demon was making him into. John didn't understand, Sam was the only person who could make himself into anything.
Season 1 "Salvation" -- "we've been waiting a long time for this fight, now it's here and I'm not gonna be in it. It's your fight, you finish this. You finish what I've started, you understand? I'll see you later.
this episode killed me. they'd known each other for 6 weeks. and cas is telling dean secrets that not another soul can ever know about. he already trusted dean more than any other living thing in the universe. kill me now.