Olivia: Peter, I'm in love with you. I can't just turn that off and I don't want to lose you. Where are you going?
Peter: Home. I have to go home.

Peter I don't understand what's happening to me any more than you do, but that doesn't change what I do know, and what you know, that if you look into my eyes, then you can see that I'm her.

Olivia

I am called September, but that is a code designation given members of our scientific team.

September

Because of the cortexiphan, I don't remember certain aspects of our relationship. I can't remember things about us.

Olivia

Astrid: Wait, stop.
Peter: What, what do you see?
Astrid: I don't see anything, but I really have to pee and I don't want to miss anything.
Walter: I've had the same issue for the past ten minutes!

Walter: Whatever consciousness Olivia appears to be manifesting now, she is not who she appears to be.
Peter: You don't know that!

Philip, you know me. Do you honestly believe I have been dosing Olivia with cortexiphan. That I could have had anything to do with her kidnapping?

Nina

Observer: Do we know why he failed to carry out his instructions? Why he did not erase the lingering traces of Peter Bishop in this timeline.
Observer 2: No. That is a question only September can answer. As well as if he is responsible for Peter Bishop's return.

Olivia Dunham. I've waited so very long to meet you.

David Robert Jones

I don't know you that well, but I'd like to think you weren't ignoring her safety for personal reasons. And that you aren't ignoring me right now!

Lincoln

Peter: I'm thinking about it. It's all I've been thinking about. And I'm afraid. I'm afraid because I've made this mistake before. I betrayed the Olivia that I love. But what I'm really afraid of is that when I look in your eyes is I know it's you. I know it's you.
Olivia: I just gotta, um...I just gotta go pee.

Olivia: I'm confused too. I feel incredibly close to you. I feel like I know you better than anyone else in the world and then when you look at me it's like none of that is true.
Peter: Olivia, I don't know what you want from me.

Fringe Season 4 Quotes

You're the closest thing I have to a mother, and I love you.

Olivia

You know they did a study on sarcastic people, and they get more illnesses than other people. Something to do with negative energy.

Robert Danzig