During the interview between Poirot and Allerton on the top deck, the shots of Poirot show the boat is moving along the river. In the shots of Allerton, there is no movement at all.
Gwyneth Paltrow was originally rumoured to be playing the part of Linnet Doyle, but Emily Blunt replaced her.
Agatha Christie said of Death on the Nile: "The book is one of the best of my foreign travel ones. I think the central situation is intriguing and has dramatic possibilities, and the three characters, Simon, Linnet, and Jacqueline, seem to me to be real and alive."
Poirot: Has life been unfair to you mademoiselle?
Rosalie Otterbourne: You've met my mother.
Cornelia Robson: I'd love someone to dance with me.
Miss Van Schuyler: But who on this planet would want to dance with you?
Ferguson: A spoiled brat, a domestic parasite, and a drunken old bat: who cares whether they're dead or not?
Cornelia Robson: You really are the rudest young man.
Ferguson: It's the future that matters, woman, not the past.
Cornelia Robson: Did you ever consider for one moment that someone out there might be grieving for that poor maid? Or how distraught Rosalie might be? And as for Linnet Doyle, well, she was just so beautiful.
Ferguson: Do you know that Cornelia's father was practically ruined by Linnet's old man, and all she can say is how beautiful she was!
Cornelia Robson: I thought you said it was the future that mattered, not the past.
Ferguson: Touchee. Will you marry me?
Cornelia Robson: What?
Ferguson: It's against all my principles, I know, but I think you should, so how about it?
Cornelia Robson: It is a disgusting idea. You are opinionated, unreliable, and utterly, utterly irritating!
Ferguson: Well, apart from that?
The Murderer: It's terribly easy, killing people, Monsieur Poirot. You begin to think it doesn't matter.
Ferguson: Amazing, isn't it? Millions unemployed, a lunatic about to take power in Germany, and all we read about is how some spoiled brat stole her best friend's fiancé.
Rosalie Otterbourne: Linnet Doyle's very beautiful, and very rich. I don't think I've ever hated anyone so much on first sight.
Jacqueline de Bellefort: I want to hurt her. To put my gun against her head and gently pull the trigger.
Colonel Race: We'll get to the bottom of it.
Poirot: Oh, I know I will.
Joanna Southwood: Isn't it awful when one's friends fall on hard times? One simply has to drop them.
Poirot: Love is not everything, mademoiselle.
Jacqueline de Bellefort: Oh, but it is, it is! You must know that. Surely you understand?
Poirot: It is terrible, mademoiselle, all that I have missed in life.
This episode is based on Agatha Christie's book Death on the Nile (1937). Eight years later, Agatha turned Death on the Nile into a stage play called Murder on the Nile, but (as with the other three Poirot books she adapted for the stage) Poirot himself was cut out of the story!
Salmoe Otterbourne: God, it's a floating Tube!
The "Tube" is a popular word for the London Underground system.