Oliver and Diggle in “Unfinished Business”

Oliver

It's been months, man. And I don't know how many apologies in which you're a forgiving person.

Diggle

Oliver, this isn't about forgiveness, man. I don't know how to move forward with this, us. Doing what what we do.

Oliver

We've worked fine since I got back.

Diggle

We got lucky. Oliver, there was a time when I would've taken a bullet for you. And I don't know if I would do that now. Which means that when we're out there, we are not out there together. You crossed a line, man. And the fact that you could do that again sits in the back of my head somewhere.

Oliver

I get it! I get it. I understand that I crossed a line. I understand that I lost your trust. What I don't understand is why you won't give me a chance to earn it back.