Peter: Are you okay?
Walter: Yes. Although when I mentioned that the poison would kill me within the hour, did either of you happen to notice the time?

Walter: I need to tinkle. Could either of you direct me to the facilities?
Peter: The facilities? You're in the sewer, Walter. You're knee-deep in the facilities.

Hey, Walter. Think we can wait down here to be mauled in silence, please?

Peter

Walter: Could you carry these, son?
Peter: Sure thing.
Walter: Be careful. We must be very gentle with them.
Peter: Right, 'cause we wouldn't want to hurt the monster babies.

Olivia: You mean that these are baby monsters?
Walter: Yes. We must collect them. Peter, a petri dish. (the larvae grow larger) Make it a bucket.
Astrid: I'm gonna be sick.
Walter: Two buckets!

Olivia: Walter, I need you to tell me what exactly you would need to create a genetic hybrid. Like, specific items, so I can see if Robert Swift bought any of it.
Walter: I would need some sodium bicarbonate and a house in he country, a place to be alone in my thoughts. Some Mahler for the late nights. And time. A lot of time.
Peter: I know. It's like he's on another planet.

Astrid: So this thing has the claws of a lion and the fangs of a snake?
Walter: It reminds me of a woman I once knew in Cleveland.
Peter: Walter, these punctures are over four inches apart. And that would make this snake eight-feet long.
Walter: Her name was Harriet something.
Olivia: How is everything?
Peter: Well, apparently you're looking for a lion-snake named Harriet.

Walter: This is quite delicious.
Peter: Where did you get that?
Walter: In the car, uneaten.
Peter: What is the matter with you?
Walter: Oh, forgive my son. He's been in a mood all day.
Peter: I just figured "don't eat the evidence" goes without saying.

Walter: How interesting.
Peter: Some would say disgusting.

Peter: It's an omelet.
Walter: It's not an omelet!
Peter: Oh, my...ugh! Walter, why is there an ear in the omelet?
Walter: It was an experiment. It was a protein-rich incubator. It was growing.
Peter: It was growing? That's perfect.
Walter: No, it's not perfect. You just ruined it.

Walter: The spread of the digits, V-shaped. It's too wide for one of those creatures. Configuration closer to that of an eagle. Of course much, much larger.
Peter: Hey, we're looking for Big Bird.
Walter: Don't be ridiculous. Perhaps a pterodactyl.

Walter: Check in on Agent Francis. Let's look in on our little friends.
Astrid: It didn't work.
Walter: Ever the pessimist. (pauses) Look.
Olivia: They're dying.
Charlie: What happens now?
Walter: Now you crap 'em out.

Fringe Season 1 Episode 16 Quotes

If my theory is correct and the bat traits are dominant in the creature, then yes, I believe we can successfully lure it. Whether we can survive the encounter is the more intriguing question.

Walter

Olivia: Walter, have you got any idea what kind of animal would be in a lab that could do this?
Walter: Well, judging by the wounds, I'd say two or three different ones, actually.
Peter: Right, a motley crew of lab animals got together and decided to exact their revenge on mankind.