Nick Fury: Because I'm a spy. Just like you. Difference is, I'm old enough to know that you get more information when you work as a team.
Black Widow: I've been working with people.
Nick Fury: I know. My spies told me.
Black Widow: Tell them when I find out who they are, they won't be telling anyone anything for a long time. I'm gonna go find out exactly when your new snitch starts school, so I can tell her myself.
Black Widow: You're Fury's new pet?
Maria Hill: I'm Maria Hill. Who are you?
Black Widow: Black Widow. The girl Fury is gonna tell you to follow. And I'm telling you right now that's a bad idea.
Maria Hill: I'm here to learn from Director Fury, and train as an Agent of S.H.I.E.L.D. I'll only take orders from him, and I don't take threats from anybody. So you can save the tough girl act. I'm tougher.