(Dean decides not to shoot Jack and throws away the gun...)
Chuck: No! Pick it up! Pick it up.
Dean Winchester: The hell, Chuck?
Chuck: This isn't how the story is supposed to end.
Castiel: The story?
Chuck: Lookit, the... the... the gathering storm, the gun, the... the father killing his own son. This is Abraham and Isaac. This is epic!
Dean Winchester: Wait. What are you saying?
Sam Winchester: He's saying he's been playing us. This whole time.
Chuck: Come on.
Sam Winchester: Our entire lives. Mom, Dad... everything. This is all you because you wrote it all, right? Because... Because what? Because we're your favorite show? Because we're part of your story?
Dean Winchester: And you're here because...
Castiel: Because of Jack.
Chuck: Listen, you guys know me. I'm hands-off. I built the sandbox... you play in it. You want to fight Leviathans? Cool. You got that. You want to go up against... what was it?... the "British Men of Letters"? Okay. Little weak, but okay. But when things get really bad, like the Apocalypse or the Other Apocalypse, that's when I have to step in.
Sam Winchester: So You're saying Jack is Apocalyptic?