History Trivia / AndThenThereWereNone

* ScienceMarchesOn: Improvements in forensic science since 1939 may have allowed the police to figure out that [[spoiler:Wargrave's actual time of death was significantly later than what it was reported to be in the diaries of the guests who lived long enough to find the 'body'.]]
** [[spoiler:Not Necessarily. His time of death was reported to be around 6:20, but the guests might not have written ''when'' he died, so much as the fact that he did. Also, it was almost a full day after he died before his body and the others were recovered, so enough time certainly could have passed.]]

* ReferencedBy: The name of the ''Franchise/TouhouProject'' song "U.N. Owen Was Her", used as a bonus stage theme in multiple games, is a nod to the name given to the killer. The boss who originally used the song, Flandre Scarlet, also has a spellcard that references the book's title.

* PostReleaseRetitle: The novel was originally titled ''Ten Little Niggers'' in the UK. The initial US edition used the now-current ''And Then There Were None'' title, but subsequent paperback reprints from 1964 to 1986 used ''Ten Little Indians''. The original US title was adopted for the UK reprints starting in 1985 and is now the official title. The translations that used the original UK title are slowly but surely switching to less offensive titles; the most recent one was the French version in 2020(!) and some languages have yet to change.

* WhatCouldHaveBeen: Vera's original motivation was poisoning her husband's lover. That was deemed much too bland and Cyril was born. [[ThrowItIn The movies use it anyway.]]

* NamesTheSame: [[Series/MisterRogersNeighborhood Mr. Rogers]] and [[UsefulNotes/DouglasMacArthur General MacArthur]].

* ScienceMarchesOn: Improvements in forensic science since 1939 may have allowed the police to figure out that [[spoiler:Wargrave's actual time of death was significantly later than what it was reported to be in the diaries of the guests who lived long enough to find the 'body'.
** Not Necessarily. His time of death was reported to be around 6:20, but the guests might not have written ''when'' he died, so much as the fact that he did. Also, it was almost a full day after he died before his body and the others were recovered, so enough time certainly could have passed.]]

* RenamedToAvoidAssociation: The stage adaptation changed General [=MacArthur=]'s name to General [=McKenzie=], as by that time General UsefulNotes/DouglasMacArthur was playing a prominent role in the Pacific Theater of UsefulNotes/WorldWarII.
* ScienceMarchesOn: Improvements in forensic science since 1939 would have allowed the police to figure out that [[spoiler:Wargrave's actual time of death was significantly later than what it was reported to be in the diaries of the guests who lived long enough to find the 'body'.]]
** Not Necessarily. His time of death was reported to be around 6:20, but the guests might not have written ''when'' he died, so much as the fact that he did.

* HidingInPlainSight: In one adaptation [[RewatchBonus you can actually see the killer poison Marston's drink.]]
* MarketBasedTitle: Possibly the only example in the Agatha Christie canon where the American title is the one used by publishers in both the US and the UK and Commonwealth (for obvious reasons).

* ReferencedBy: The name of the VideoGame/{{Touhou}} song "U.N. Owen Was Her", used as a bonus stage theme in multiple games, is a nod to the name given to the killer. The boss who originally used the song, Flandre Scarlet, also has a spellcard that references the book's title.

* PostReleaseRetitle: The novel was originally titled ''Ten Little Niggers'' and then ''Ten Little Indians'', both of which had to be changed due to the ValuesDissonance regarding the titles in question.

* ReferencedBy: The name of the VideoGame/{{Touhou}} song "U.N. Owen Was Her", used as a bonus stage theme in multiple games, is a nod to the name given to the killer.

* WhatCouldHaveBeen: Vera's original motivation was poisoning her Husband's lover. That was deemed much too bland and Cyril was born. [[ThrowItIn The movies use it anyway.]]

* WhatCouldHaveBeen:
** Vera's original motivation was poisoning her Husband's lover. That was deemed to bland and Cyril was born. [[ThrowItIn The movies use it anyway.]]

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* Market-BasedTitle: Possibly the only example in the Agatha Christie canon where the American title is the one used by publishers in both the US and the UK and Commonwealth (for obvious reasons).

* ReferencedBy: The name of the VideoGame/{{Touhou}} song "U.N. Owen Was Her", used as a bonus stage theme in multiple games, is a nod to the name given to the killer.