I just had a thought. You know how Dean tells Garth to essentially stop hunting because somebody has to tell the story? What if that's where Supernatural came from, Garth changing his name and making it into a tv show? < thats what i thought!
His brother is the most important thing to him. I love that he finally tells Sam how he really feels which is what Sam desperately wanted. "I want you to drop the act and be my brother again.">>> Didn't need my heart anyway.