- Into that silence came The Voice. Without warning, inhuman, penetrating...
There's a reason Agatha Christie is known as the grandmother of the slasher film and that reason is And Then There Were None.
- Vera goes up to her room alone and begins smelling the scent of the sea where Cyril drowned. Then she seems to feel a cold hand touch her neck. An incredibly effective use of seaweed (which was hung from the ceiling)!
- One of the surviving men references the rhyme, saying how it mentions one of the little Indians being killed in a zoo, which is absent on the island. Vera answers that they've all lost their humanity.Vera Claythorne: Don't you see? We're the zoo!
- Emily Brent's hallucination of the dead Beatrice Taylor walking towards her fits here too. Especially if you know what she has done to the girl.
- Made worse when you realize Emily saw Beatrice as a sinner who went to hell. What must have been going on in her head?
- A rather chilling line from the epilogue.I know what you're going to say sir. That it was Vera Claythorne. That she shot Lombard, pushed a block onto Blore and hanged herself. That's quite alright... up to a point. There's a chair with seaweed markings, same as her shoes and it looks like she stood on that chair, adjusted the noose, and kicked away the chair. But that chair wasn't found kicked over. It was, like all the other chairs, found neatly put up against the wall.
- The letter to the police, revealing who the real killer is. Among other things, there's an interesting line about how he knew Vera would kill Lombard and hang herself. It really hammers in how much of a Chess Master they are.
- Vera Claythorne, the original Final Girl. You thought she was the protagonist? She murdered a kid and hangs herself at the end
1987 USSR adaptation
- Differently from the Alan Towers adaptations, the Russian film plays the atmosphere of the book completely straight. This was the first version to show the aftermath of every murder.
- Apart from an eerie leitmotiv and a scare track, the film has almost no soundtrack. This, coupled with the frequent close-ups, creates a very claustrophobic atmosphere.
- Anthony Marston doesn't simply choke on his poisoned drink, he crashes face-first into a glass plate. And we are shown the aftermath.
- Emily Brent hallucinating about Beatrice Taylor knocking at her window during the second night. Emily breaks down and yells at the girl, throws the Bible at the window and then, suddenly, regains her calm and whisper to herself that she now knows who the killer is — Beatrice Taylor.
- The scene, absent from the book, in which Lombard rapes Vera. If there was any doubt about his sociopathic nature, that scene erases it.