History Trivia / TwentyEightDaysLater

* GenreKiller: Together with the American remake of ''Film/TheRing'' that same year, this film effectively read the obituary for the teen horror genre of the mid-late '90s, and arguably for the {{slasher|Movie}} genre as a whole. Both films were {{sleeper hit}}s featuring mostly adult protagonists and a lack of the usual slasher tropes that won acclaim from critics and horror fans, and teen horror, which was already on life support by that time, mostly faded out in the '00s.

* KeepCirculatingTheTapes: An increasingly literal example. It’s remarkably easy to find a DVD copy in a used book store these days. Want to find it streaming? Too bad - it was removed from all streaming services in the U.S. in late 2022.

%% Not sure if this shouldn't go under SeinfeldIsUnfunny instead

* KeepCurculatingTheTapes: An increasingly literal example. It’s remarkably easy to find a DVD copy in a used book store these days. Want to find it streaming? Too bad - it was removed from all streaming services in the U.S. in late 2022.

* KeepCurculatingtheTapes: An increasingly literal example. It’s remarkably easy to find a DVD copy in a used book store these days. Want to find it streaming? Too bad - it was removed from all streaming services in the U.S. in late 2022.

* CreatorChosenCasting: Megan Burns only had one previous film credit in ''Liam''. Creator/DannyBoyle selected her for the role of Hannah based on the strength of her performance in that film. She was his first and only choice.

** In his review, Creator/RogerEbert found the theatrical ending to be such a jarring shift in tone, he was outright expecting the fighter jet in the end opening fire at the survivors to fit the tone of the rest of the film.

* LoopingLines: Creator/CillianMurphy rerecorded all of his lines during Post Production, replacing a faux-British accent with his natural Irish accent because he thought the British accent sounded too fake.

* SparedByTheCut: The final cut uses a FocusGroupEnding where Jim recovers from his fight with the soldiers, but the director has said that the "true ending" is an alternate cut where he succumbs to his injuries. The latter is included as a DVD extra and is a point of contention among fans and even professional critics.

* AllStarCast: Subverted. The cast was intentionally made out of barely known or near-debutante actors. However, pretty much everyone involved in the film became a famous actor ''later'', creating a rather jarring contrast upon rewatch just few years after the premiere.

** The original script had a completely different second half, where the focus remains squarely on the four survivors as they hole up in the lab that started the whole mess. It was replaced by the story with the soldiers because of a problematic plot element of replacing every single drop of blood in the human body, in which Jim would offer to save [[spoiler: Frank]] and the scientist would cure him by swapping their blood around. In the storyboards of this ending included as a DVD bonus feature, it's explicitly noted that, given that the film had already established that just one drop of infected blood was enough to infect someone, it would never have worked.
-->"And that was the problem right there with this ending. We'd established that one drop in the eye will infect someone. Then how in the flying fuck are we gonna sell the idea that this blood transfusion idea is gonna work? What do you do, clean out every capillary and vein with bleach before making the transfusion?"

** The original script had a completely different second half, where the focus remains squarely on the four survivors as they hole up in the lab that started the whole mess. It was replaced by the story with the soldiers because of a problematic plot element of replacing every single drop of blood in the human body. Essentially Jim would offer to save [[spoiler: Frank]] and the scientist would cure him by swapping their blood around.

* DarkhorseCasting: Creator/DannyBoyle intentionally sought out unknown and obscure actors for the majority of the leading roles, as he wanted the film to be discovered and not rely solely on star power. Creator/CillianMurphy, Creator/NaomieHarris, Creator/NoahHuntley and Megan Burns were virtually unknown prior to the film production, with Murphy and Huntley having only had minor roles in films, Harris only having done British television, and Burns having only had one previous acting credit. The only famous actors of note that were cast were Creator/BrendanGleason and Creator/ChristopherEccleston. This also added to the tension of the plot, since viewers ''couldn't'' rely on star power to predict who's going to make it to another scene.

* DarkhorseCasting: Creator/DannyBoyle intentionally sought out unknown and obscure actors for the majority of the leading roles, as he wanted the film to be discovered and not rely solely on star power. Creator/CillianMurphy, Creator/NaomieHarris, Creator/NoahHuntley and Megan Burns were virtually unknown prior to the film production, with Murphy and Huntley having only had minor roles in films, Harris only having done British television, and Burns having only had one previous acting credit. The only famous actors of note that were cast were Creator/BrendanGleason and Creator/ChristopherEccleston.

** Creator/EwanMcGregor was the first choice to play Jim. Creator/RyanGosling was the second.

* FocusGroupEnding: Theoriginal ending had Selena and Hannah failing to save Jim in a hospital and then ended with the two women walking out alone. Test audiences found it too bleak and thought Hannah and Selena were certain to be killed soon. Interestingly, this ending was added to the theatrical cut in 2003 as a Post Credits Scene.

* SparedByTheCut: The final cut uses a FocusGroupEnding where Jim recovers from his fight with the soldiers, but the director has said that the "true ending" is an alternate cut where he succumbs to his injuries. The latter is included as a DVD extra and is a point of contention among fans.