- Inspector Marcel Guillaume: [Interrupting Murdoch, who's been talking French] Let's do English, please. Allow me to massacre your language.
- Inspector Marcel Guillaume: [as Dr. Ogden enters the railroad car] Well, well, I am very impressed.
- Dr. Julia Ogden: That a woman can be a doctor?
- Inspector Marcel Guillaume: That a doctor can be so beautiful.
- Detective William Murdoch: [Referring to Dr. Ogden] She's engaged... to another man.
- Inspector Marcel Guillaume: Then it's a perfect situation.
- Detective William Murdoch: How so?
- Inspector Marcel Guillaume: Well, she can be your mistress.
- Detective William Murdoch: My mistress?
- Inspector Marcel Guillaume: Monsieur Murdoch, the marriage is about family. You make babies with your wife, but you make love to your mistress.