Season1X18 something wicked
John: All right. You know the drill, Dean. If anybody calls, you don't pick up. If it's me, I'll ring once and then call back. You got that?
Young Dean: Mmhmm. Don't answer the phone unless it rings once first.
John: Come on, Dean, look alive. This stuff's important.
Young Dean: I know, it's just, we've gone over it, like, a million times, and you know I'm not stupid.
John: I know you're not. But it only takes one mistake, you got that?
(Dean nods)
John: All right, if I'm not back Sunday night?
Young Dean: Call Pastor Jim.
John: Lock the doors and windows, close the shades, and most important...
Young Dean: Watch out for Sammy.
(he looks over at Sam who is watching tv)
John: All right, if somethin' tries to bust in?
Young Dean: Shoot first, ask questions later.
(John puts a hand on his son's shoulder)
John: That's my man.
(John leaves, Dean locks the door behind him)