- Peter Salter: You've got to believe me, I am the thing that the security service fears the most. The spy who goes through Traitor's Gate willingly and embraces everything he's been trained to destroy.
- Maisie Simm: Do I have to call you Tom now?
- Tom Quinn: Do you mind?
- Maisie Simm: [shrugs] Why did you say you Matthew?
- Tom Quinn: Because Matthew is a secret name.
- Maisie Simm: It wasn't secret because I know it. Tom is secret.
- Tom Quinn: Once I tell you, there's no going back.
- Ellie Simm: So what are you? A gangster?
- Tom Quinn: I'm a spy. I work for MI5.
- Ellie Simm: MI5. Jesus!
- Tom Quinn: You can't expect me to go against my training, right.
- Ellie Simm: Your training!
- Tom Quinn: I am what I do.
- Ellie Simm: So, now you know that I'm not bin Laden's sister, you can tell me?
- Tom Quinn: I was scared that if I told you, you'd leave and everything flowed from that, I want to be with you.
- Ellie Simm: No, everything flows from 'can I trust you?'
- [pause]
- Ellie Simm: Is Matthew your real name?
- Tom Quinn: No.
- Tom Quinn: Anyway, a triumph.
- Peter Salter: You reckon?
- Tom Quinn: Yeah, I thought you were so off-piste, you weren't even on the mountain.
- Ellie Simm: What did you say you did again?
- Tom Quinn: Fell on a stapler.
- Ellie Simm: That's an industrial strength stapler then, isn't it?
- Tom Quinn: Yeah, it's a whopper.