The Return

David: I need to apologize.
Mary Margaret: Yes, you do. Keep going.
David: I didn't believe you. I didn't stand with you.
Mary Margaret: You know, I will never forget that moment. The moment the world sort of blows you backwards and the one person you thought would always be there to catch you, he isn't there.
David: Look at what was going on: it was your jewelry box, your fingerprints, knife in your apartment.
Mary Margaret: It was a setup!
David: And a really good one! I'm human. I fell for it. I'm sorry, but we have to move forward.
Mary Margaret: But we can't. It's like something in this world doesn't want us together.
David: Like what? Dark forces?
Mary Margaret: Maybe. I don't know, but it's like something keeps pouring poison between us, and what I don't want is to have all of those good memories replaced by moments like that, when I looked at you and I saw that you didn't believe me.