Oliver: Do you want Lauton arrested?
Diggle: No.

Then let's talk about Helena. Oliver, if you didn't still have feelings for this girl you would have thought of a different solution than letting her extort you into killing someone.

Felicity: Where are we going to get our hands on a rare Spanish antiquity?
Diggle: You really have no idea how rich his family is, do you?

Diggle: Oliver, if this were anybody else you'd be hooded up right now on your way to have an Arrow side chat with them.
Oliver: This isn't anybody else. This is my mother, and I know her.

Diggle: Woah. That's a neat trick. You gonna teach me that someday?
Oliver: No.

Diggle: Find what you're looking for?
Oliver: Took down three Vertigo pushers tonight, Diggle. Last one finally knew a name. The Count.
Diggle: The Count. That's worse than The Hood.

I thought you took that book off your father's dead body. How could he have been so chatty?

So Laurel's on her own against a murderer who burns people alive?

They need the man in the hood.

So is this guy trying to frame you or call you out?

You're like a dope fiend who thinks he can deal with his own addiction by making another addict go straight.

Diggle [to Oliver]

It sounds like you have a narrow definition about being a hero.

Arrow Quotes

There is a prophecy. The man who doesn't perish at the blade of Ra'a al Ghul will become Ra's al Ghul. Ra's al Ghul doesn't offer, he orders. Oliver! Don't delude yourself into thinking you have a choice.

Malcolm

Laurel: Helena, you don't have to do this.
Helena: Yes, I do. Because once you let the darkness inside, it never comes out.