- Arthur Shelby: Yeah, well, why don't you think of it like... quarantine, Michael, eh? We'll treat you like a fucking dog, hmm? Smelly one. Stinking one. Until we know you're clean, hmm?
- Thomas Shelby: I had a dream about a black cat last night, Polly. A black-cat dream means there is a traitor close by. It was you told me that.
- Aunt Polly: A black cat can mean lots of things. Can mean you're hurting yourself. Betraying yourself. Are you seeing things, Thomas?
- Thomas Shelby: Yes, I am. Yes, I am. Very clearly. Coming from every fucking direction.
- Oswald Mosley: We have a mutual acquaintance. May Carleton. When I asked about you, she said, 'Oh, my goodness, where do I begin?'
- Thomas Shelby: And why were you asking after me?
- Oswald Mosley: Because, as I have said, I adore dangerous.