Here's the Polivia picspam on the episode 'The Arrival' (1x04):
OLIVIA: Well, your living arrangements are temporary. We’re finding you an apartment so that-
PETER: Olivia, don’t bother. I wanted to help. I felt bad. I still feel bad about what happened to you. But the truth is, you don’t need me here.
OLIVIA: That isn’t the truth.
PETER: It is. [..] You need him. I’m just a babysitter.
OLIVIA: Peter, you decipher what he says. Things that other people can’t even follow.
PETER: No, not any more. Anybody can do that. There’s nothing special about me.
OLIVIA: You’re his son.
PETER: That’s not the only thing. I don’t do well staying in one place. You know that. This isn’t the job for me.
OLIVIA: If you leave, so does he.
PETER: Really? You’re telling me that if the Federal government wants to get Walter Bishop out of a mental institution, they can’t do that without the consent of his son?
OLIVIA: It’s your father. He’s made it very clear that if you leave, he won’t cooperate with our investigations.
PETER: I don’t believe it.
OLIVIA: He would rather go back to St. Claire’s - than work here without you. He said that more than once.
PETER: (half seriously, half jokingly) Was he wearing clothes at the time?
OLIVIA: Thank you for staying.
PETER: (whispers) This is the last one, Olivia. Then I’m gone.
OLIVIA: (whispers) okay…
(it's so cute the way she was staring at him from far)
PETER: You think I did this to myself?
OLIVIA: No, I just - I was wrong to- to demand that you stay here. Walter is not your responsibility. As you’ve always said, this was just supposed to be temporary. You have your life.
PETER: Olivia, did you hear what I just said? I mean, I’m a fairly open-minded guy, but there are things happening here that I can’t even begin to explain. And I am not going anywhere until I can.
OLIVIA: In that case, you might want this. Your credentials have been approved. Civilian consultant to the Department of Homeland Security.
PETER: Does this mean I don’t need an escort to come into the Federal Building anymore?
OLIVIA: Yeah.
PETER: Will it get me out of speeding tickets?
OLIVIA: Maybe.