- Hercule Poirot: You woke the bear from his sleep. You cannot cry when he tangos.
- Ariadne Oliver: That's not an expression in any language.
- Hercule Poirot: I must tell you, Madam, I have been all my life uncharmed by your kind.
- Mrs. Reynolds: My kind?
- Hercule Poirot: Opportunists who prey on the vulnerable.
- Mrs. Reynolds: You don't believe in the soul's endurance after death.
- Hercule Poirot: I have lost my faith.
- Mrs. Reynolds: How sad for you.
- Hercule Poirot: Yes, it is most sad. The truth is sad.
- Hercule Poirot: When a crime has been committed, I can, by application of order and method and the slow extinguishing of my own soul, find without fail or doubt, whodunit.
- Ariadne Oliver: You think the help had motive?
- Hercule Poirot: The help always have motive. Beginning with having to endure being called "the help".
- [last lines]
- Hercule Poirot: Your parents died one soon after the other, then your brother. Your trusted doctor is a beloved old friend to the family. Your brother was unmarried, as are you. No other relations. Your family is not cursed. I suspect your brother added a codicil to his will naming your doctor beneficiary should all the members of your small family perish, after which I suspect he then murdered them claiming natural causes at their deathbeds - and your life is next in danger. You may wish to sit...
- Hercule Poirot: I know only that we cannot hide from our ghosts, whether they are real or not, we must make our peace with them, and live life somehow.
- Ariadne Oliver: You're doing that thing where you pretend to know more than everyone else in the world.
- Hercule Poirot: I as yet know nothing. The truth does not come without a tax of effort.
- Ariadne Oliver: We can wait for the police.
- Hercule Poirot: I am Hercule Poirot, no?
- Ariadne Oliver: No... yes?
- Hercule Poirot: *Yes*. If the police can succeed where I cannot I will be next off the balcony into the canal.
- [spoiler]
- Vitale Portfoglio: Can I at least see you home safe before you turn me in for fraud?
- Hercule Poirot: In the daylight... neither appears necessary.
- Vitale Portfoglio: [nods] In the end it is you protecting me, Dottore.
- Maxime Gerard: [outraged on learning Alicia's true fate] You took her from me?
- Rowena Drake: [venomously] To keep her away from *you*!
- Rowena Drake: [Poirot reveals her guilt in her daughter's death] How dare you!
- [her last words]
- Rowena Drake: I couldn't let her go... she was my whole world!
- Ariadne Oliver: I am the smartest person I ever met, and I cannot figure it. So I came to the second.