Walter: About my former colleague and his son. It's one of the inherent pitfalls of being a scientist, trying to maintain that distinction...between God's domain and our own. Sometimes I forget myself. But then, you already know that.
Olivia: What do you mean?
Walter: If you've read my file, then you know the truth about Peter's medical history. I've been meaning to ask you-
Olivia: Walter. There was no mention of any medical history. Just his birthday.
Walter: Oh. Uh-I was going to ask you to keep it between just the two of us, but-uh-I suppose then there's no need.