!!Books
* MoneyDearBoy: Child has said of writing the first book, "I wasn't one of these people that felt compelled to write. It had to keep a roof over our heads, so it was totally, totally 110% commercially motivated."
* TechnologyMarchesOn: In the first novel, ''Killing Floor'', which was first published in 1997, it's a plot point that cell phone numbers don't have area codes. [[{{AsYouKnow}} As anyone can tell you]], that is not the case with modern cell phones.

!!TV Series

* See [[Trivia/{{Reacher}} here]].

!!Films
* AbilityOverAppearance: Jack Reacher in the novels is 6'5" and muscular. Creator/TomCruise is 5'7" and slender, but utterly nailed the role, to the approval of author Lee Child.
-->'''Child:''' With another actor, you might get 100% of the height but only 90% of Reacher. With Tom, you'll get 100% of Reacher with 90% of the height.
* AwesomeDearBoy: Creator/WernerHerzog took the role of the Zec because he'd always wanted to play the villain in an action film.
* TheCameo: Lee Child himself has a bit role as the desk sergent at the police precinct, who shrugs affirmatively to Helen when Reacher gives his "There are three things cops never do" line.
* DistancedFromCurrentEvents: The film's New York premiere in was cancelled due to the Sandy Hook Elementary School shooting the day before.
* FakeAmerican: Brits Creator/RosamundPike and Creator/DavidOyelowo, Australian Creator/JaiCourtney and Creator/JoshHelman and Canadian Alexia Fast all play Americans.
* HideYourPregnancy: Creator/RosamundPike was pregnant during filming.
* MissingTrailerScene: For some reason, the trailer for the movie [[http://www.dailymail.co.uk/news/article-2304013/Missing-Jack-Reacher-explosion-earns-sharp-eyed-cinema-fan-refund-Paramount-Pictures.html featured an exploding cliff.]] Regardless of the exploding cliff having something to do with the movie, not one explosion ever occurred in the movie.
* NoStuntDouble: Creator/TomCruise did all of his own stunt driving.
* OnSetInjury: During a fight scene, Creator/TomCruise had to kick an opponent. It took nearly fifty takes to get right and by the end Cruise's foot was extremely swollen, to the point he had to have his boot cut off to remove it.
* PlayingAgainstType:
** ''Creator/WernerHerzog'' plays the villain.
** Creator/TomCruise doesn't do any sprinting.
* ReleaseDateChange: The film was moved from a February 2013 release to Dec. 21, 2012 as a result of ''Film/WorldWarZ'''s TroubledProduction, which caused that movie's release to be moved to June 21, 2013.
* ThrowItIn: When Jack Reacher's car crashes into some barrels, the car accidentally stalled upon the impact, but Creator/TomCruise was luckily able to restart the car before driving off again. Rather than do a retake, Creator/ChristopherMcQuarrie decided to leave it in the film, as he felt it added to the suspense of the scene.
* WhatCouldHaveBeen:
** Creator/NicolasCage, Creator/JimCarrey, Creator/RussellCrowe, Creator/JohnnyDepp, Creator/CaryElwes, Creator/ColinFarrell, Creator/HarrisonFord, Creator/JamieFoxx, Creator/MelGibson, Creator/HughJackman, Creator/StephenLang, Creator/DolphLundgren, Creator/EdwardNorton, Creator/RonPerlman, Creator/BradPitt, Creator/KeanuReeves, Creator/KurtRussell, Creator/ArnoldSchwarzenegger, Creator/WillSmith, Creator/SylvesterStallone, Creator/JohnTravolta, Creator/JeanClaudeVanDamme, Creator/VinceVaughn, Creator/DenzelWashington and Creator/BruceWillis were all considered for Jack Reacher. Creator/DwayneJohnson, a fan of the books, pursued the role around 2007.
** Creator/HayleyAtwell, Creator/AlexaDavalos and Creator/BritMarling screen-tested for the role of Helen Rodin. Creator/ChristopherMcQuarrie later cast Atwell in ''Film/MissionImpossibleDeadReckoning''.
* WordOfGod: Creator/ChristopherMcQuarrie stated in a 2015 interview that the scars referenced and shown on Jack Reacher's body during the introduction to the character, were scars earned from his encounters in other Jack Reacher books.
* WorkingTitle: ''One Shot'', which is the name of the original novel.
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