Fringe, Season 4

Olivia:
I was thinking about that girl Jessica. One encounter with us and her child almost becomes an orphan. We deal with this every day. We're playing odds, Peter. What do you really think our chances are of having a normal life?

Peter:
Olivia, I know you're scared about what happened in the lab yesterday.

Olivia:
I don't know what's happening to me, what I'm becoming. I've got this power inside me that terrifies me because I don't understand it, and I just want it out.

Peter:
Okay. We'll figure it out. Together.

Olivia:
Is that a personal guarantee?

Peter:
[kisses Olivia and rests his forehead against hers] After all we've been through, I will not lose you again, Olivia.