- Dr. Walter Bishop: Why didn't you tell me Agent Dunham was here?
- Peter Bishop: I'm pretty sure I did.
- Olivia Dunham: Walter, the last time you used that thing, you drilled it into the guy's head.
- Dr. Walter Bishop: If you think he'll find it disagreeable... I suppose it could be modified.
- Peter Bishop: Really? You didn't think to mention that to the last guy?
- Dr. Walter Bishop: Pheromones. Undetectable chemicals that nonetheless affect our behavior, our sex drive...
- Peter Bishop: [points to Walter's open bathrobe] Hey, speaking of sex drive...
- Dr. Walter Bishop: Oh, Peter, don't be such a prude. I'm sure Agent Dunham knows what a penis looks like. Don't you, Agent Dunham?
- Peter Bishop: My father, ladies and gentlemen.
- Dr. Walter Bishop: The boy is obviously thinking, yes? Having thoughts. We just haven't been able to hear them.
- Peter Bishop: And I'm sure you can do that, can't you? Hear his thoughts?
- Dr. Walter Bishop: Perhaps I can.
- Nurse: You were on staff at St. Claire's Asylum?
- Dr. Walter Bishop: No, no, no. I'm not a medical doctor. I was a patient.