Fringe, Season 4

Peter:
[answers the door, smiling] Hey.

Olivia:
Hey. [smiles] Um, this might be a little weird, but I was wondering if I could just come in and have a look around.

Peter:
Yeah, of course. How you feeling?

Olivia:
[looks toward the couch] That's where Walter used to sleep.

Peter:
How did you know that?

Olivia:
[turns to look at him] We had that case, that couple in apartment 6B, the woman who lost her husband. After I came back here and then we went upstairs. I remember.

Peter:
That's not possible.

Olivia:
Peter, I remember William Bell. I remember crossing over to bring you back. I remember Jacksonville and seeing you shimmer the first time we kissed. I remember you walking to the machine and getting inside and being scared that you were going to die.

Peter:
I don't know what's going on, but something must be going on.

Olivia:
I remember. I remember us. I remember everything.