[[quoteright:348:[[ComicStrip/FoxTrot http://static.tvtropes.org/pmwiki/pub/images/cghtyuih_2504.jpg]]]]
[[caption-width-right:348:[[YouMeddlingKids And he would've gotten away with it too, if it weren't for you meddling kids.]]]]

->''"These two right now are just comic relief, but they play an important role later on. You'll see."''
-->-- '''D. R. [=McLeod=]''', ''[[http://wizdiaries.blogspot.com Wizard Diaries]]'' [[http://wizdiaries.blogspot.com/2008/02/character-sketch-7-donnchadh-and.html Character Sketch #7: Donnchadh and Conchobar]]

Any character who is innocuously and unimportantly introduced to the viewer, but who [[LawOfConservationOfDetail later proves to be important]] by the end of the episode.

In other words, they're a human ChekhovsGun.

For example, consider a poolboy in the ''Series/{{CSI}}'' mystery of the week who just happened to be at the scene of the crime just before the murder, where other leads overshadow that one until the last five minutes, when suddenly Grissom finds that one piece of evidence that conclusively proves it was him. (Of course, if the poolboy is played by Creator/GeorgeClooney, everyone and their mother [[NarrowedItDownToTheGuyIRecognize will know it was him the minute he appeared on screen]].)

Or, in an episode with TwoLinesNoWaiting, a character that seemed to be a BitCharacter in the B plot suddenly becomes a large player in the A plot. On most Cop Dramas, this usually means the two teams are WorkingTheSameCase.

According to RogerEbert, you can often [[GenreSavvy figure out]] who the murderer is (in a badly-written murder mystery, at least) by checking the LawOfConservationOfDetail: The ChekhovsGunman is the only character who doesn't seem to have any other reason for being in the story (see TheButlerDidIt). Compare to NarrowedItDownToTheGuyIRecognize, which is based more on the ''actor playing the role'' than on the character in itself.

In video games, such characters are always obvious because they [[YouALLLookFamiliar look conspicuously different from generic NPCs]], and usually [[NominalImportance have a name]].

When the ChekhovsGunman is hidden by shadows, you've got yourself a case of SinisterSilhouettes. If a character in an [[DerivativeWorks adaptation]] is transformed into a Gunman by appearing earlier than in the source work, that's an EarlyBirdCameo. If a character originally conceived as minor becomes important through later CharacterDevelopment, that's a DestinedBystander.

May overlap with TheDogWasTheMastermind. Sometimes used to refer to a writer who constantly uses and/or is particularly skilled with using ChekhovsGun or its variants (including the Gunman), such as Creator/EiichiroOda, author of ''Manga/OnePiece'', although this isn't the primary usage.

See also ConnectedAllAlong.

----
!!Example Subpages

[[index]]
* ChekhovsGunman/AnimeAndManga
* ChekhovsGunman/AnimatedFilm
* ChekhovsGunman/LiveActionFilm
* {{ChekhovsGunman/Literature}}
* ChekhovsGunman/VideoGames
* ChekhovsGunman/WesternAnimation
[[/index]]
----
!!Other Examples:

[[foldercontrol]]

[[folder:Comics]]
* Bunnie Rabbot of ''ArchieComicsSonicTheHedgehog'' first appeared in a pin-up in the original four issue mini-series before appearing in the comic proper some issues later. She also looked markedly different.
** Dr. Finitevus first appears during the "Return to Angel Island" arc as just another member of the Dark Legion. About 40 or so issues later, he joins the BigBadEnsemble by manipulating damn near ''everyone'' in order to ensure Knuckles becomes the new Enerjak.
*** Dr. Finitevus had been around earlier than that - when Knuckles first started showing signs of being "Chaos Knuckles", he was the echidna who used the Chaos Siphon to try to drain Knuckles' power.
* In the ''BlackestNight'' event, Tales of the Lantern Corps #3 gives Kilowogg some CharacterDevelopment by showing his own training as a rookie lantern by [[{{Expy}} Lantern Ermey]]. [[spoiler: In GreenLanternCorps 41, we see Ermey return as a Black Lantern]]
* The locust swarm that causes the Bone brothers to get separated in the first issue of ''{{Bone}}'' seem like just some natural, albeit random, occurrence. After the scene where the swarm separates the Bones the locusts disappear and don't seem to have been all that important. That is until later when we learn about who the BigBad is. [[spoiler: He's called The Lord of '''Locusts''']].
* Practically anyone who has ever appeared in the [[{{Webcomic}} Prelude]] but not in the graphic novel of ''{{Dreamkeepers}}'' is suspected to be one of these.
* ''Comicbook/{{Empowered}}'' has [[spoiler:Ocelotina]] a female hostage Emp tries (and fails) to save from [=ThugBoy=] in Volume 1 appears again in Volume 2 trying to kidnap Empowered for LesYay-related reasons. She then becomes a recurring character as a deliberate model for the fetish crowd that Emp keeps unintentionally feeding.
* In the ''ComicBook/FallOfCthulhu'' comics by BOOM! Studios, a character with no speaking lines at all who can be spotted in a lot of backgrounds throughout the whole story turns out to be the final overmind (though not a villain per se) who orchestrated the whole story through a GambitRoulette.
* SelfDemonstrating/TheJoker during ''InfiniteCrisis''. First seen torturing King and asking him why he wasn't invited to join the Society. Is told that he's considered too unpredictable, and kills King out of anger. Not seen for the next hundreds of pages or so. [[spoiler: Guess who kills Alexander Luthor Jr.?]]
* Before appearing as one of the lead villains in the ''Captain America Corps'' mini-series, Bright Star first appeared as an unnamed reporter in an issue of Creator/EdBrubaker's ''ComicBook/CaptainAmerica'' run.
* A zombie {{Deadpool}} appeared in ''MarvelZombies'', but only as an extra without dialogue. Later on, he plays a main role in the series. Similarly Black Bolt appeared numerous times in the series, but doesn't get an actual role until much later.
* ''ScottPilgrim'' volume 3 features a cameo of a mystery man who then turned out to be [[spoiler:[[BigBad Gideon Gordon Graves]]]].
* In ''Franchise/SpiderMan'', NormanOsborn was originally introduced as a nameless member of Mr. Jameson's club, and got upgraded to nameless friend of Jameson a while later. While he got a good deal of mostly non-speaking background appearances, he was barely noticed until he was revealed to be Harry Osborn's father about 2 years after his first appearance. 2 issues later he was revealed as the Green Goblin, who had been an active villain in the series for years.
* The first and second volumes of ''Comicbook/UltimateSpiderMan'' are peppered with casual references to Tandy Bowen, one of Peter's [[HeWhoMustNotBeSeen unseen schoolmates]]. She finally shows up in volume 3 as one half of the superpowered duo Comicbook/CloakAndDagger.
** As a bonus gag, Ty Johnson (Cloak) is revealed to have been the teenage manager of the burger joint Peter worked at.
* [[ComicBook/{{Hellblazer}} John Constantine's]] official first appearance is in ''Comicbook/SwampThing'' #37. But in #25, there's a background character in a crowd scene who looks suspiciously similar to Constantine.
* The first page of ''Comicbook/{{Watchmen}}'' features a red-haired man holding a sign that reads "TheEndIsNigh." He appears a few more times and doesn't seem very important--[[spoiler: until Rorschach's mask comes off halfway through]].
* In issue 2 of ''ComicBook/{{Earth 2}}'', [[TheFlash Jay Garrick]] passes by a [[TalkativeLoon rambling man]] in a back alley. In issue 9, that man turns out to be [[DoctorFate Khalid Ben-Hassin]].
* ''ComicBook/MyLittlePonyFriendshipIsMagicIDW'': [[spoiler:Pinkie finds the cave troll and has him save the others from a group of giant spiders]].
* ''The Manhua/RavagesOfTime'' uses this trope so, ''so'' much: For example, the little kid who made a one-page appearance alongside Shan Wuling and some shady types at the end of a chapter in Volume 6 but who's quickly forgettable once the rest all take up much more prominent roles? When he appears as a grown up in Volume 33 and moves out, his identity is hinted at by his new traveling companions are identified as Xu Sheng and Pan Zhang[[note]]officers of the future "kingdom" of Wu[[/note]], then confirmed when he identifies himself as [[spoiler:Zhongmou]], the courtesy name of [[spoiler:Sun Quan]].
* ''ComicBook/{{Diabolik}}'' uses this rather often, with a minor character becoming suddenly important at the end of the story or a few issues later, but, being a LongRunner (continuously published since 1963 and running) also set the record for this with Margot Hammer, first appearing in the 1963 WhamEpisode "The Arrest of Diabolik" as an unimportant character and an UnwittingPawn of Eva in the rescue of Diabolik and then returning in ''2001'' in "The Shadow of the Avenger" as [[spoiler: the title character, convinced the police is letting Diabolik go and ''carrying on terrorist attacks'' to force them to arrest and execute the man who indirectly got her husband imprisoned]]. They then ''broke the record'' with Walter Dorian and "the greatest smuggler of all times", the first a man whose identity had been used by Diabolik in the first three stories and the latter mentioned in passing in "The Phantom Murderer", also published in 1963, and then told their story (and their importance in Diabolik's backstory) in the ''2006'' story "The Years Lost in Blood", [[spoiler: with Dorian showing up in person]].
[[/folder]]

[[folder:Fanfiction]]
* In Fanfic/{{Downfall}}, [[spoiler: Zommari shows up in chapter 16, casually mentioned: "The most senior of these artificial Arrancar, a bald, dark-skinned, sinister-looking man, was kneeling on one knee, silently, at the perimeter of the force."]] -he goes on to be a pivotal fighter in the subsequent battle, never mentioned by name. This is especially notable, as [[RescuedFromTheScrappyHeap it gives him a much needed moment of true badassery]].
* In ''Time Braid'', [[spoiler:[[SuperpoweredEvilSide Demon Sakura]]]] is this. You think she's gone after a forced merge early on, but then she's discovered in a kind of 'inactive aspects' area of Sakura's MentalWorld, and Sakura uses her to guard the box containing the memories she doesn't want [[BigBad Sasuke]] to see. Later, [[spoiler:her mastery of the Sharingan is used to give Sakura the chance at her HeroicSacrifice, and afterwards she becomes half of Sakura's new [[AGodIAm demon/kami split axis]]]].
* In ''FanFic/HogyokuExMachina'', after [[Manga/{{Bleach}} Ichigo's]] [[PeggySue time traveled]], he and other characters try to avoid future crisis' by planning ahead and/or making peace with would-be enemies. This includes [[{{Filler}} anime filler arcs]] and [[NonSerialMovie movie continuities]], so it wasn't unusual to see [[spoiler: Muramasa]] involved. At the [[spoiler: final battle, though, he saves Ichigo's life which completely thwarts Aizen's plans. Without him there, [[TheBadGuyWins the bad guy would have won]]]]. Yep, a [[spoiler: [[FillerVillain former filler villain]]]] was ''that important''.
* In ''Fanfic/{{Forward}}'', Ashley Frye bumps into a drunk man in a bar while looking for information about her sister Kaylee. This later turns out to be John Garis, an agent of the Academy who's after River, and he saves Ashley from [[spoiler: Jubal Early]].
* In ''FanFic/CalvinAtCamp'', Calvin throws a water balloon at Sally, early on in the episode "Champion Charlie Brown." [[spoiler: She comes back later and has him arrested by the Urban Rangers for it, playing right into Lucy's hands.]]
* In ''WhiteRain'', the kid who gets punched in the face back in Chapter 1 [[spoiler: shows up in Chapter 11 and helps out.]]
* Calvin's dad nearly runs over a skunk in ''Fanfic/CalvinAndHobbesTheSeries'' while on the way to a courtroom. Shortly after they arrive, it reappears and [[SmellySkunk sprays him]] in revenge, forcing Calvin to take his place.
* [[Literature/SherlockHolmes Dr. Watson]] and his wife have a baby girl in the finale for ''Fanfic/ChildrenOfTime''. The baby turns out to be a ''[[Series/DoctorWho Time Lord]]'', having been conceived in the TARDIS, and her regenerative abilities become instrumental in putting things to rights in the last episode.
* ''FanFic/ThePowersOfHarmony'': Vigil at first just seems to be a SixthRanger there for no reason other than giving the group of Royal Guards enough members. Then it turns out he's [[spoiler: [[PoweredByAForsakenChild Horizon]]'s brother (last seen, unnamed, in the flashback Blair and Piro show Twilight) and linked to him the same way as the Echoes.]]
* Played with in Fanfic/JusticeSocietyOfJapan. Given how [[CodeGeass Lelouch Lamperogue]] and the Black Knights appear early one, one would expect that Zero would be one of the founding members of the titular team. [[spoiler: Subverted in that he isn't. Shirley Fenette is. But double subverted in that Lelouch himself plays an important role.]]
* In ''[[Fanfic/PokemonMysteryDungeonReflectingBalance Pokémon Mystery Dungeon: Reflecting Balance]]'', it is mentioned in a couple of conversations between Blitz the Shinx and his mentor, Hercules the Heracross, that Blitz has a younger sister. Said younger sister eventually comes to visit Blitz in Chapter 21, and ends up indirectly spurring revelations about Blitz's past.
* In ''Fanfic/MegaManRecut'', some humans Mega met during previous episodes appear, aged-up, in Future Shock.
** Bright Man is mentioned early in the first part of "The Beginning", several parts before his actual appearance in the next episode.
* ''Fanfic/MegaManReawakened'' has Darian Darhk, who plays a minor role at first before helping Mega in later chapters.
* ''FanFic/CrownsOfTheKingdom'' has the Queen of Hearts, Jiminy Cricket, and Hypatia, all of whom are mentioned early on and return to play key roles later.
* ''FanFic/TheFifthAct'' has younger Cloud Strife, whom the elder [[PeggySue Cloud Strife]] convinced while posing as the kid's uncle to stay in Nibelheim instead of joining Shinra in the early chapters. The kid comes back [[spoiler: when he goes to Midgard with the escaped Kunsel in tow]] trying to find his "uncle" and give Zack the means to [[SpottingTheThread find the holes]] in the elder Cloud's cover story.
** Another is Vincent, who is quickly ditched by Cloud when he doesn't support Cloud's plan to kill Sephiroth. He come back [[spoiler: when he shoots Hojo in the head.]]
* Aldev from ''Fanfic/WarriorsOfTheWorldSoldiersOfFortune'' turns out to have been [[spoiler:possessed by the villain in an attempt to divide the party.]]
* In ''[[https://www.fanfiction.net/s/6501165/19/Enemy-to-Love Enemy to Love]]'', Orihime doesn't have much screen time early on, but she is the one to [[spoiler: A. destroy the Hogyoku so [[BigBad Aizen]] couldn't use it, and B. use it's power to bring Ulquiorra [[BackFromTheDead back to life]], who kills Aizen himself]].
* In ''Fanfic/TravelsOfTheTrifecta'' there is a part where Conway and Paul are traveling on Route 216 and come across a Smoochum swarm, and Conway wants to catch one but Paul thinks they're uselessly weak Pokemon and they leave the swarm alone. One Smoochum takes a moment to watch them out of curiosity. Later on, that Smoochum ends up helping Conway when he's in danger.
[[/folder]]

[[folder:Live Action TV]]
* In {{Friends}}, "the girl from the Xerox place" is mentioned in multiple episodes starting in the second season. Later, [[spoiler: Ross sleeps with the girl, ending his and Rachel's relationship.]]
** THEY WERE ON A BREAK!
* In the first season of Series/{{Dexter}}, [[spoiler: Rudy]] is introduced in a justified manner but then given strange amounts of attention, developing his character until it is revealed that he is [[spoiler: the BigBad known as the Ice Truck Killer]] and, ultimately, also [[spoiler: Dexter's brother, Brian]].
* Lots of characters in ''TheWire'', most notably Clay Davis.
* Just who the heck was that no-name crewman on ''Series/StarTrekEnterprise''?? Nobody important, just a time-agent from a thousand years in the future who's secretly defending the ''Enterprise'' and its crew from interference from other time-agents trying to alter the timeline. Nothing really big...
** Though this is a particularly inept version as he'd never actually appeared in the series before, so his sudden prominent role was a big tipoff that something was going on.
* ''Series/ICarly'': Jeremy aka "Germy", a student who always coughs and sneezes is the prime example in Season 1. In "iNevel", after Nevel gave iCarly a dishonest review, the trio employs Jeremy to force Nevel to tell the truth, knowing his hate of germs. In "iWill Date Freddie", he also appears early in the episode, and later gets recommended by Freddie "who knows tech stuff" as his replacement when he left iCarly.
* ''Series/{{NCIS}}'' is a bit of a repeat offender on this one. If someone gets a line but doesn't seem to be contributing to the main plot otherwise, they did it. (If the writers try to hide their non-involvement by stuffing them into a romantic subplot with a main character, they ''definitely'' did it.)
** Subverted in one episode, where the villain of the romantic subplot had not done it, even though he was suspected by a majority of the cast.
*** Oh, ThePrimeSuspectNeverDidIt. (Unless the prime suspect changes before the final ad break, in which case it was definitely the original suspect what done it.)
** This can also be used in reverse... if there ARE no outstanding single line characters, the villain MUST be one of the major characters for the week. This is easily seen in a first season episode where the villain turned out to be [[spoiler:David Keith, the sympathetic father and husband of the kidnapping victims and the very target of the plot!]]
* This is the easy way to spot the murderer in ''Series/{{CSI}}''. In the first 10 minutes or so there will be a completely unimportant background character, often who has one unimportant line. They add nothing to the plot, and would not be missed. Example: in one episode the owner of a diner is being questioned in her own establishment. Halfway through the chat she turned to tell the "short order chef" to get on with his work. I turned to my wife and said "It's the cook." It was.
** The Miniature Killer, anyone? She appeared for about three seconds at the end of an episode, cleaning the floor in the lab, and later went on to be revealed as the killer.
* Likewise on ''Series/{{Elementary}}''.
* ''Series/CriminalMinds'' loves this trope so much they pulled it ''twice''. ''In the same episode''. The villain in Mayhem [[spoiler: is actually two villains: the young teenage citizen who calls 911 to help Hotch, and the paramedic who comes to save them, violating the FBI's direct orders not to interfere.]]
** Not to mention the second episode of the first season. [[spoiler: the very innocent looking chemistry girl who explains the chemicals that could be used in arson is the one who actually stole the chemicals to commit the crimes.]]
* Like Harry Potter, ''Series/{{Lost}}'' loves casually mentioning random names who become important characters years later. Probably the most notable is Jacob, first mentioned in an offhand line of dialogue and who becomes mentioned dozens of times over the years as the Others' godlike figure. After numerous possible sightings, he finally appears in full for the first time in the season 5 finale. Radzinsky, Kelvin's former hatch partner who shot himself, became an important character three seasons later (due to [[spoiler:time travel]]).
** Ethan Rom, who had a brief appearance in a season one episode before the next episode revealed him [[spoiler: as one of the Others]]. He then makes several other appearances throughout the series (despite [[spoiler: being dead]]).
** Ilana. She's introduced as merely a bounty hunter apprehending Sayid who crashes onto the Island. Turns out she knew where they were really headed, she works for Jacob.
** Richard Alpert first appeared as little more than a background character. Then, we see him at several different times [[spoiler: with decades between each appearance, yet he doesn't have so much as a single gray hair or wrinkle to show for it.]] And you begin to realize that something's up with this guy...
* The same thing happened to some random {{Mook}} of Apophis' in the ''Series/StargateSG1'' pilot. He didn't even get any lines until he saves all of the main characters near the end. Teal'c went on to join SG-1, and become one of only two characters to remain a main character for all ten seasons.
** This was intended with the introduction of Cameron Mitchell at the end of season seven, during the battle over Antarctica, rather than at the beginning of season nine, when he joined the team. This didn't pan out, though, and he instead was simply {{retcon}}ned [[RememberTheNewGuy into existence without ever having been mentioned before]], which was somewhat jarring for some fans.
* Meanwhile on ''Series/StargateAtlantis'', the Ancient that becomes known to SG-1 as Merlin (Moros) slips in a cameo appearance nearly ''three years'' before he's even alluded to on ''SG-1''.
** In the ''Atlantis'' pilot "Rising", O'Neill's pilot (pun not intended) initially seems like a throwaway character... until he waltzes into the Antarctic outpost and it turns out that he possesses the Ancient gene, and is immediately recruited into the Atlantis Expedition. Turns out the pilot, Major Sheppard, is TheHero of the new series.
* In later seasons of ''[[Series/BattlestarGalacticaReimagined Battlestar Galactica]]'' a main plot point became that Starbuck had drawn a "mandala" religious symbol in her room which was visible in early season 2; they would then see this symbol on ruins they found, or in clouds as a "sign from God" and Starbuck would state she'd been doodling it since she was a child. However, in behind the scenes interviews, the writers admitted that the ring-shaped mandala symbol in her room in season 2 was just something the art department doodled, even they didn't think it was a "mandala" (just three rings), and the writers came up with the idea by rewatching old episodes and used it as a justification for major changes in the storyline...which in fact, were never planned out from the beginning. Fans eventually realized there was no over-arcing "Plan" to the series...
** Another example from this show is the character Helo, who was meant to be a one-shot character in the pilot movie. He was well-received by fans, and there were enough inquiries about the fate of the character that they decided to keep him alive. He ultimately became an important character in the overall mythology of the series.
*** This might be evidence of a complete lack of planning, or just a willingness to change course based on feedback or spontaneous ideas that crop up later, while keeping other previously planned details intact. WordOfGod was generally quite open about explaining in the podcast when something was spontaneous rather than planned, even down to changing the script based on actor improvisation.
** In the season 2 episode "Final Cut", D'anna Biers films a number of seemingly innocuous pilots in the ships barracks. One of these pilots turns out to be the person who had been threatening Saul Tigh, and attempts to kill him later in the episode.
* Weeks before Dominic Monaghan was confirmed to be joining the cast of ''{{Flash Forward|2009}}'', his character Dr. Simon Campos makes an appearance in [[http://www.youtube.com/watch?v=dhgDiS1wzv8 this installment]] of ABC's "[[FakeCrossover ABC House]]" ad campaign, complete with an ActorAllusion to ''Series/{{Lost}}'' (a show that Monaghan previously starred in).
* Early episodes of ''TheSarahConnorChronicles'' often showed someone watching the Connors, although usually all we could see was an arm with a barcode tattoo. Derek Reese (and, yes, he is related to Kyle) eventually became one of the series leads.
* Frasier Crane's first appearance on ''{{Cheers}}'' (Season 3, Episode 1: "Rebound, Part 1") was as a nameless bar patron, until Diane sprung it on Sam that her shrink happened to be at the bar, observing them the whole time! Frasier (Kelsey Grammer) eventually stayed on long after Diane (Shelley Long) left the show, and eventually got his own spin-off.
* Lampshaded in an episode of ''Series/MontyPythonsFlyingCircus'', when intergalactic blancmanges attempt to win Wimbledon. Two characters are introduced as "not the kind of people to be the centre of one of the most astounding incidents in the history of mankind... So let's forget about them and follow instead the destiny of this man." The couple then prove to be key to the resolution of the plot, and complain to the camera at the end of the sketch: "We tried to tell you at the beginning of the film but you just panned off us."
* Subverted by the "Man in Members Only Jacket" in the last episode of ''Series/TheSopranos''.
** Maybe not, considering [[spoiler:how many people think he actually shot Tony]].
*** Apparently, Steve Perry only let the show use "Don't Stop Believing" [[spoiler:if no one died]] so in a way, Word of God says [[spoiler:Tony survived.]]
** Played straight by Tony's cousin, Tony Blundetto, whose actions in the fifth season are arguably the main catalyst for the New York-New Jersey War in the last season.
* In the first episode of ''{{Firefly}}'' we see advertisements for the Blue Sun Corporation. A little bit later on, we see the characters using various products from them. It turns out that Blue Sun is one of the {{Big Bad}}s that are peppered throughout the show, and their agents are a serious threat to our favorite crew.
** Blue Sun was one of the results of Executive Meddling. Fox wanted a BigBad, Fox got a big bad. They put the Blue Sun logo on the cargo containers in the pilot post-production.
* Eagle-eyed viewers of the classic ''Series/DegrassiJuniorHigh'' will spot numerous "extras" milling around the school that would later go on to play a major role in the series. One of whom was Spike, who wasn't even named for some time despite evolving into the crux of the drama at the end of the first season and turning into one of the franchise's longest running characters. You can see her at the school dance in the ''second episode'' as a throwaway character... making out with the guy who would later be the father of her child.
** ''Series/TheOC'' did the same thing with Taylor Townsend, who didn't become important until the third season but was clearly present in a number of earlier school scenes.
* In the first half of ''Series/PowerRangersTurbo'', there was "A Drive to Win", which featured a soccer match. It unusually focused on a player named Carlos and a cheerleader named Ashley. A few episodes later, in "Passing the Torch", we are introduced to Cassie and T.J. who were riding a bus to Angel Grove, and later on we meet Carlos and Ashley again, and at the end of the two-parter, all four replaced the veteran rangers. It was revealed in an unproduced script called "Rangers in Concert" that Tommy, Kat, Tanya, and Adam did see the Millennium Message, thus knowing who their replacements are.
** Similarly back in Season 2, Rocky, Adam, and Aisha were introduced long before they ended up becoming the new Red, Black, and Yellow Rangers.
* In ''Series/KamenRiderKabuto'', for a good half-dozen episodes, a "tricked-out" rider, bearing a strong resemblance to Kabuto appears and even assists in fights (by out-doing the other riders' own Clock Up). We find out a bit later that this mystery rider is, in fact, Kabuto after his MidSeasonUpgrade.
* In the fifth season of ''Series/{{Angel}}'', Wolfram and Hart's mailman is inexplicable wearing a Mexican wrestling mask at all times. A few episodes in, we learn that he was a member of a team of demon-hunting luchadores who fought an Aztec demon and a robot built by the Devil.
* Very common in ''Series/{{Monk}}''. The office episode has to be a particularly {{egregious}} example: [[spoiler:the guy didn't even ''talk'' before Monk suddenly singled him out as the killer]]. The baseball episode is a pretty extreme example as well, considering that the killer turns out to be [[spoiler: someone Monk had seen appearing in an advertisement for a few seconds, not speaking, earlier in the case]].
** Another episode pulled this with the "gunman" being beneficial to the heroes. Monk and the detectives are investigating a bank robbery when Randy questions a living statue who was working outside the bank. Randy then is inspired to become a living statue himself and practices the trade throughout the episode, thus implying that the statue's role in the story is over. Later, the heroes are [[spoiler: locked in the vault by the perpetrators. They later open a box which turns out to contain the controls for the electronic message board on the front of the bank. They use it to request help. Guess who relays the message to the police.]]
* In ''Series/SpaceSheriffGavan'', during one episode Gavan manages to get to the victim of the day before the monster of the week kills him and gets him to safety. He'll live, but only if he gets medical treatment at Gavan's home planet. So he's shipped off to Planet Bird and never spoken of again, until he shows up during the final battle in a BigDamnHeroes moment as Sharivan the newest Sheriff. Turns out DaChief of the Space Sheriffs approved of his toughness and had him inducted into the Sheriff [[spoiler:(actually it was because they found out while treating him that was really the ChosenOne for a supposed lost race of people)]]. He would go on to be the hero in the next series ''Series/SpaceSheriffSharivan''.
* The Observer in ''Series/{{Fringe}}'' appears as a bald [[TheMenInBlack Man In Black]] in the background of every episode that nobody seems to notice. In Episode 4 we learn more about him, and that he's somehow connected to the odd incidents that the main characters are investigating.
* The season two finale of ''Series/{{Chuck}}'' had [[ChekhovsGunman Chekhov's]] ''[[ChekhovsGunman Assault Squad]]'', which was important both for a BigDamnHeroes moment and to introduce some new villains.
* "Doctor Saunders" in ''{{Dollhouse}}''. [[spoiler: Not only do we find out that she's a doll, but when she reappears in "Getting Closer", she closes the episode by shooting Bennett Halverson (SummerGlau). So she's literally a gunman.]]
* ''Series/BuffyTheVampireSlayer'':
** A one-off villain who tries to get Angel to off himself in the third season, plus its minions who live under a Christmas tree lot, seems like a relatively innocuous villain of the week, until it all comes back four seasons later as the BigBad. The astute viewer probably should have been suspicious, though, since the baddie in question is apparently the "first evil", and you don't get to be the source of all evil without having something going for you.
** Early in the series, there's Jonathan, a RecurringExtra who appears repeatedly around their high school. He's usually in some sort of distress and needs to get rescued. He later makes some prominent appearances in "Earshot" where Buffy prevents his suicide, and "Superstar" where he gets ADayInTheLimelight. In season 6, he [[spoiler: falls in with Warren and becomes part of the trio of villains for that season]].
** Jonathan's season 6 cohorts, Warren and Andrew, count too. Warren was seemingly a one-shot character who apparently left town during his brief second appearance. Although Warren's first appearance was in Season 5, which was supposed to be the last season and he didn't come back as a major villain until the show was revived on UPN. Andrew is the [[RememberTheNewGuy till-then unseen]] brother of Tucker Wells, who was the antagonist in season 3's "The Prom". Tucker would've actually been there instead of Andrew and fulfilled Warren's role, but actor Brad Kane was unavailable.
** Doc, the old man who gave Dawn the spell to bring Joyce back to life in Season 5. Turns out he's a Glory worshipper and he is the one who opens the portal.
** In Season 7, Amanda, the first student Buffy talked to in her job as councilor was a potential slayer.
** Andrew answers a call (for Willow) from a guy with a girly voice called Fred in Season 7. In the next episode Willow comes back with Faith.
** Severin is seen in one panel in the last issue of Season 8.
** Veruca had bit parts in "Living Condition" and "Beer Bad" before making a full appearance.
** The Buffybot appeared mirroring the real Buffy much more closely than her last appearance to decoy and weaken Glory.
* An early episode of ''Series/BabylonFive'' introduces a LoveInterest for [[spoiler: Londo Mollari]] who leaves him to work out her personal life. Two ''seasons'' later, [[spoiler: she reappears and is summarily killed as part of a plot by [[TheChessmaster Morden]] to manipulate Londo into [[FaceHeelTurn resuming his alliance with the Shadows]]. It works -- meaning that a character who appears in three episodes (and spends one episode as a ''corpse'', and another as a [[DeadPersonConversation ghost]]) turns out to be critical in shaping the entire second half of the story.]]
** Another very literal example is [[spoiler:Jack, Garibaldi's second in command, who is present in his minor role through much of the first season. At the end of season 1 he is revealed to be involved in a plot to assassinate the President when he shoots Garibaldi in the back to prevent him from warning anyone.]]
* Lucy Saxon from ''Series/DoctorWho'', [[spoiler:quite literally]]. For almost two full episodes, she's nothing more than one of Harold Saxon's assets. [[spoiler: Then she picks up the gun.]]
** We first meet Wilfred Mott as he's running his newsstand on Christmas Eve during ''Voyage of the Damned'', and only many episodes later do we learn that he's Donna's grandfather. He plays a vital part at the end of the Tenth Doctor's run.
** In the episode that introduces Martha Jones, an old lady keeps appearing in the background, asking various people for help while aliens are causing chaos, making the audience think she's just a confused and clumsy old lady. Then it's revealed that [[spoiler: she's actually the blood-sucking villain the aliens are looking for.]]
* ''Series/{{Supernatural}}'' viewers may remember Adam Milligan, a boy that Sam and Dean meet who is teased at in Season 4 promos to possibly be their half-brother. [[spoiler: Turns out, even though he [[LongLostSibling '''was''' their brother]] he was DeadAllAlong and the boy the Winchesters meet is a Ghoul trying to kill them.]] Very few people expected to hear from him again... until a Season 5 episode reveals that [[spoiler: even though Dean is the ArchangelMichael's preferred vessel, he is not his ''only'' vessel. Being a vessel is InTheBlood... and Dean just happened to inherit the trait from his father. Since Dean won't consent to possession (and he apparently has to, to be used by Angels), guess who is suddenly brought BackFromTheDead?]] HINT: It's not John.
*** [[spoiler:It's also implied that the only reason that this worked at all was because the time period was so short.]]
** Crowley is referenced in passing by another crossroads demon in Season 3's "Bedtime Story" when she mentions her (male) boss to Sam. [[spoiler:Season 5 revealed that Crowley had been the one Bela gave the Colt to in the third season. He gets mixed up in an EnemyMine in Seasons 5-7 before becoming the BigBad of Season 8.]]
** Another Gunman for ''Supernatural'' would be the Trickster. He appeared in the second and third seasons as an antagonist with god-like powers and a veiled interest in the Winchester brothers, before the fifth season revealed that [[spoiler:he is actually the ArchangelGabriel, who fell from Heaven when he couldn't stand his family's fighting anymore]].
* ''Series/{{Sherlock}}'': Molly Hooper introduces her new boyfriend, Jim, early in "The Great Game". In the last scene, [[spoiler:he is revealed to be Moriarty.]]
--> "Did I really make such a fleeting impression? But then, I suppose...that was rather the point."
** In ''The Reichenbach Fall'', John finds Mrs. Hudson with a repairman after getting a report that she has been hurt. Later on, we find that the repairman is [[spoiler:the hitman sent by Moriarty to kill Mrs. Hudson if [[EvilPlan Sherlock does not commit suicide]].]]
* ''Series/{{Merlin}}'' includes a straightforward ChekhovsGun with Excalibur, which is burnished by dragon's fire during the episode and thrown into a forest lake at its conclusion. The next season introduces a MysteriousWaif called Freya, who dies during the course of the episode and taken by Merlin to the same lake where he sets her body adrift in a small boat upon the water. The episode in question is called "The Lady of the Lake." You connect the dots.
* ''Series/{{Castle}}'' used to be in love with this trope. The killer was ''always'' the one person they didn't interrogate (especially if it was the grief-stricken relative). It's gotten better in the third season, though.
* ''Series/{{Charmed}}'''s third season had the background character of Abbey who worked in Piper's club who was there for about five episodes. Then in the episode ''Sight Unseen'' she is revealed to be Prue's stalker.
* ''Series/{{Eureka}}'' has a minor example in the episode 'Minor Nobel'. Two elderly scientists shown trying to explain nuclear fission to Zoe later turn out to be members of the protagonist's team, without which he cannot save the world from an accidentally activated particle cannon.
* In ''Series/{{Community}}'' episode "[[Recap/CommunityS2E08CooperativeCalligraphy Cooperative Calligraphy]]", it turns out Troy's pet monkey, who was seen in one episode the previous season, was the thief stealing Annie's pens.
* In the ''Series/{{Leverage}}'' episode "Girl's Night Out", the guy in background being a terrible waiter turns out to be [[spoiler:the guy that planted the bomb]].
* In ''Series/OnceUponATime'', there was an unnamed man introduced in the first episode of the second season. It wasn't until episode 6 that we find out [[spoiler: his connection with Emma and Henry]]. And we don't find out that [[spoiler: he is Baelfire, Rumpelstiltskin's son]] until episode 14.
* DisneyChannel stars often make one-off or minor appearances in their shows and films before getting heavily featured in their own. SelenaGomez had a guest spots on ''TheSuiteLifeOfZackAndCody'' and HannahMontana while David Henrie made a few appearances on ''ThatsSoRaven'' before both of them were placed as the leads in ''WizardsOfWaverlyPlace''. Similarly Orlando Brown who played Eddie in ''ThatsSoRaven'' previously appeared in ''LizzieMcGuire''. Vanessa Hudgens and Monique Coleman also had recurring roles in ''The Suite Life'' before they starred in ''HighSchoolMusical''.
** Sterling Knight appeared in HannahMontana before starring in SonnyWithAChance.
* US television has done this too. Jeffrey Donovan (Michael Westen) from Series/BurnNotice and Frederick Weller (Marshall Mann) from InPlainSight both had an appearance on Series/{{Monk}} before starring in their own series'.
* ''Series/BreakingBad''. Oh boy, Gustavo "Gus" Fring, Mike Ehrmantraut, Hector Salamanca, Todd Alquist, Todd's uncle Jack, [[spoiler:Elliott & Gretchen Schwartz]] and those are just the really big examples.
* In the season 6 opener of ''Series/SonsOfAnarchy'', the episode starts with an unknown young boy getting ready for school, and making sporadic appearances throughout the episode. [[spoiler:He's a very literal example. At the end of the episode he's shown to have committed self-harm, despises his classmates, and commits a shooting spree at his school with a gun he stole from his mom's boyfriend, a member of Nero's crew.]]
* ''TheThickOfIt'':
** Steve Fleming mostly wars against Malcolm at the end of Series 3, but Nicola's negative attitude towards him ends badly for her in Series 4. Fleming makes the front page of the Guardian in episode 4 with claims that Nicola is unelectable, which causes Malcolm to realise that the time is right for her political demise. By the end of the episode, he's succeeded in forcing her to resign.
** Tara Strachan, the economist Adam and Fergus talk to in episode 3 of Series 4. There's a couple of blink-and-you'll-miss-it shots of her with a concerned look on her face as she takes a phonecall and looks into the office in which the group are reacting to the news of disgruntled and mentally ill nurse Mr Tickel's suicide. She quickly ends the call when they come out, which doesn't come up again until the huge enquiry into leaking that covers the events surrounding Tickel's death and engulfs the entire cast. It turns out she was reporting the inappropriate response (including elation from Phil), which bites the group hard when they're called on it.
* ''Series/{{Arrow}}'' has a few.
** John Diggle, Oliver's bodyguard who he sneaks away from and humiliates every chance he gets when he gets back on the island is the first person Oliver breaks the secret to, in an attempt to get him to join Oliver on his crusade. He does.
** The girl who was on the boat with Oliver turns out to be Laurel's sister, and her death is what causes tension with the Lance family. [[spoiler:She's also very alive, and comes back as the Black Canary.]]
** Odd example with Felicity Smoak. She was never intended to be more than a minor one-off extra to help Oliver recover data from a computer. She quickly became an EnsembleDarkhorse and as a result, became this as a recurring major help to Oliver. [[spoiler:She eventually joins Team Arrow as a very essential key member.]]
[[/folder]]


[[folder:Music]]
* The ''Franchise/EvilliousChronicles'' "Daughter of Evil" by the Vocaloid Kagamine Rin gives us this example: Early on, the song mentions that the princess has a "servant with a like face". In the sequel, "Servant of Evil" by Kagamine Len, it turns out that [[spoiler:the servant in question, the princess's twin brother, changed clothes with her so he could die in his sister's place.]]
** Fans waited years for the song representing [[SevenDeadlySins Wrath]] to come out. A FandomBerserkButton was to say that "The Last Revolver" was the Wrath song. [[HilariousInHindsight Come 2014]], and "The Last Revolver" turns out to be the backstory for the Wrath song, "The Muzzle of Nemesis". The Wrath sinner was staring everyone in the face for four years and no one knew it. Bonus points for being an actual gunman.
* ''Music/RedHotChiliPeppers'' released "Dani California" in 2006. The title character was soon revealed to be the same "Dani the girl" from the chorus of "By the Way" (2002) and also the "teenage bride with a baby inside" from "Californication" (1999).
[[/folder]]

[[folder: Newspaper Comics]]
* Eugene from ''{{Foxtrot}}'' was this, as the page image suggests. He started out as a minor character in the 1997 Camp story arc, but 3 years later, the Wus, including him, returned, but aside for one strip early on, he never appeared. That is, until [[spoiler:it turned out that he was the one who stole Phoebe's camp journal, and left a bunch of fake clues from everyone, setting up the events of the arc.]]
[[/folder]]


[[folder:Professional Wrestling]]
* Also happens in ProfessionalWrestling as companies will use local talent or developmental wrestlers as crowd plants for heels to attack or other roles as police officers or security. Also happens if wrestlers have matches on the B-Shows before having a proper debut on A Shows.
** Wrestling/CMPunk can be seen among the gangsters during Wrestling/JohnCena's WrestleMania 22 entrance two months before his proper debut on ECW.
** MVP had a role as one of Wrestling/KurtAngle's security guards protecting his Olympic medals on an episode of WWESmackDown.
** Wrestling/{{Sheamus}} and Wrestling/WadeBarrett appeared as security guards on a 2006 episode of Raw, with Sheamus taking a [[FinishingMove Pedigree]] from Wrestling/TripleH.
* Wrestling/MollyHolly actually made two appearances on episodes of WWF Heat back in 1998 under the name Starla Saxton. This was before she joined WCW and later WWE permanently.
* Candice Michelle was introduced as a backstage make-up artist late in 2004 and appeared in random backstage segments for a while before becoming a prominent character on TV.
* Another one that shows how well WWE creative team can plan stories in advance is the character of [[Wrestling/TerriPoch Tori]] (not Wilson). She was introduced as an obsessed Wrestling/Sable fan at the 1999 ''Royal Rumble'' helping Sable win a match and eventually feuding with her going into ''[=WrestleMania=] XV''. Watching old Sable matches will show Tori sitting in the front row of the audience regularly for at least two months before she actually debuted on TV.
* In 2003 the La Résistance stable was your typical ForeignWrestlingHeel team and one episode had them make their way to the ring and insult a man who appeared to be a US pilot. Later on in the match, the pilot jumped out of the crowd and entered the ring to help La Résistance win their match. Next week he was added to their stable as Rob Conway.
* The NXT rookies from season 1 could count given that when the season was over, they rampaged WWE and formed TheNexus. Then Wrestling/DanielBryan was released almost immediately, but brought back as an enemy of TheNexus.
* Even the [=McMahons=] followed this trope. From [[Wrestling/VinceMcMahon Vince]]'s announcing days before the Wrestling/MontrealScrewjob outed him as the WWF/WWE's owner, to [[ShaneMcMahon Shane's]] refereeing and appearances as a backstage official, to [[Wrestling/StephanieMcMahon Stephanie]] appearing as a random passer-by in a StoneColdSteveAustin segment months before debuting as Vince's daughter.
[[/folder]]

[[folder:Tabletop Games]]
* In RolePlayingGames, most RPGA tournament events followed this trope in that if someone was introduced passively, [[NominalImportance but by name]], then that person would return by the end of the event either with the Superweapon or as the Big Bad. One player was heard saying at Gen Con: "Of course I knew he was the bad guy. He was the first NPC we met who was an ass to us."
* Amara Li was named as a random museum donor in ''TabletopGame/{{Pathfinder}} Society's'' 2nd season. In the 3rd season, she is the leader of a major faction.
[[/folder]]

[[folder:Theater]]
* In NoelCoward's ''Theatre/BlitheSpirit'', the one who called the ghosts into the house and is keeping them tied there turns out to be [[spoiler:[[TheButlerDidIt the maid]], an overeager girl who for most of the play has just been your typical simple servant played for laughs]].
* Early on in ''DirtyRottenScoundrels'', Chief of Police Andre warns Lawrence, a master conman, that there is an infamous con artist even more skilled than him in town, known as the Jackal. This is promptly forgotten about for most of the show until "The Reckoning," at the climax of the story: [[spoiler:after Ms. Colgate, Lawrence and Freddy's con target whom both men had fallen in love with, leaves the scene, having supposedly been swindled out of $50,000 by Freddy, Lawrence and Freddy find that ''they'' are the ones swindled out of $50,000, with the lone suitcase they have remaining to them merely containing Freddy's clothes and a note from Ms. Colgate that says "Goodbye, boys; it was fun! Love, ''The Jackal.''"]]
** Not quite. Lawrence is on the lookout for the Jackal in the beginning and once he sees Freddy conning some tourists, he assumes he's the Jackal. [[spoiler:However, it was never officially confirmed that he was.]]
* In ''Theatre/{{Hamlet}}'', Laertes is introduced briefly as a character in the first act, before departing for most of the play's storyline. He returns in the fourth act and plays a major role at the end of the play.
** There is also Fortinbras, who is briefly mentioned but not seen early in the play, then makes his first appearance at the end of the play to assume control over Denmark in a DarkHorseVictory now that all its royal family is dead.
* In ''Theatre/{{Pippin}}'', the torch-wielding player who will play a part in the grand finale makes a false entrance at the beginning of the play, when the Leading Player promises to present "a climax never before seen on a public stage."
* Played with a bit in Tom Stoppard's mystery parody ''Theatre/TheRealInspectorHound'', where both the murderer ''and'' the victim are Chekhov's Gunmen.
* ''RehearsalForMurder'' [[spoiler:the killer is the man in the back of the auditorium.]] Also true in the TV movie it's based on.
* Inverted in the play ''{{Rumors}}'' when the two biggest players in the show never actually appear on-stage, with one of them only showing up with one line from off-stage at the end.
* In ''Theatre/SweeneyToddTheDemonBarberOfFleetStreet'', the crazy old Beggar Woman is primarily a side character whose interactions with the main cast are primarily for comic relief. [[spoiler:She's actually Sweeney's thought-to-be-dead wife, Lucy Barker, who spent fifteen years [[GoAmongMadPeople Going Among Mad People]] after surviving her attempt to kill herself with poison after [[RapeAsDrama what happened to her]] at Judge Turpin's masked ball]].
* Dr. Lyman Hall in ''Theatre/SeventeenSeventySix'' starts as a new delegate whose need to be introduced to his fellow Congressmen is a convenient way [[AudienceSurrogate to introduce them to the audience as well]]. He foreshadows his role when he says that while Georgia is against independence, he himself is for it. [[spoiler:After witnessing Adams' ElevenOClockNumber, Hall changes his vote to yea.]]
[[/folder]]

[[folder:Web Comics]]
* Mike from ''WebComic/BobAndGeorge'' made a brief appearance [[http://www.bobandgeorge.com/archives/index.php?date=010717 at the very end of Mynd's introductionary storyline]]. In a [[http://www.bobandgeorge.com/archives/index.php?date=010728 later animated strip]], he and Chadling make an appearance as potential characters Proto Man could be teaming up (who turned out to be Roll). Both characters are [[http://www.bobandgeorge.com/archives/index.php?date=010904 properly introduced]] in the second storyline featuring Mynd.
* [[http://ozyandmillie.org/1998/04/29/ozy-and-millie-2/ The very first strip]] of ''WebComic/OzyAndMillie'' features background characters who would become important later.
* Jones from ''Webcomic/GunnerkriggCourt''. [[http://www.gunnerkrigg.com/archive_page.php?comicID=161 Her first mention in the comic]] was so subtle that no one noticed it at the time. Then she was introduced standing next to the Headmaster at the parlay, watching the proceedings silently. As it turns out, she's responsible for training the future Medium, and she's a valuable source of information.
* In ''TalesOfTheQuestor'', there is a small story where Linneaus, a Raccoonan pastor learns that the Alligator people in the swamp were looking for information about God and he volunteers to go to them as a missionary. While that story seems like a postscript story to the strip's first major continuity, there is a later story where a wizard tells of a boy with a powerful talent for magic who goes half-crazed in horror of his power and the people who tried to exploit him and he was last seen running into the swamp, never to be seen again. These stories may be unrelated, but given the religious allegory nature of the strip, it would seem that the boy is inadvertently heading for the one Raccoonan who can help him.
* ''Webcomic/GirlGenius'': Krosp the emperor of all cats is in the last panel of [[http://www.girlgeniusonline.com/comic.php?date=20031210 This page]] among Dr. Demitri's teddybears.
** Moloch von Zinzer at first appears to be just a throwaway enemy. In just a few short pages, he comes back to play a larger role. The clank in the time window doesn't actually come into being until years (our time and comic time) later. Von Zinzer's true importance is hinted at when Dupree gives her phenomenon report to Klaus.
** Merlot is of minor importance, when we first meet him, and then one last time years later.
** The Geisters... they first appear in the above-mentioned phenomenon report from Dupree.
** Otilia, the Muse of Protection, appears [[spoiler:in another body]], then in a flashback cameo, then we see her somewhat worse for wear.
** Franz, a huge lizardlike monster who lives in the sewers of Mechanicsburg was introduced trying to have a nap in june 2008. In december 2011, he awoke, and came to the defense of the Heterodynes.
* During the Sister arc of ''Webcomic/ElGoonishShive'', Tedd and Elliot found the diary of the wizard who created the diamond that had "created" Ellen. [[spoiler:Guess who the antagonist of the arc Sister II is, six years later.]]
* In an early ''[[Webcomic/TheOrderOfTheStick Order of the Stick]]'' strip, [[DarkActionGirl Sabine]] mentions that she is a servant of "the archfiends" sent to aid (and get sex from) [[EvilTwin Nale]]. Later on, we see a brief flashback of her in the Lower Planes, where she receives orders from three rather ominous looking cloaked figures. These three figures were eventually reintroduced as characters in their own right, the Inter-Fiend Cooperation Commission, and look to be shaping up as ''very'' important villains...
** And now we have [[spoiler:Elan and Nale's father Tarquin, who only appeared in a ''single panel'' of a ''cutaway gag'' in one of the early strips.]]
** For his early appearances in the story, Blackwing is the subject of jokes about how DND players neglect their familiars when playing as arcane casters. [[spoiler:Then he plays a crucial role in O-Chul and Vaarsuvius' plan to destroy Xykon's phylactery, and gets a promotion to major character.]]
** Hel, the dwarven goddess of the dead, was shown in a couple throwaway gags arguing with Thor over whether dead dwarves counted as having died in battle. [[spoiler: But then it was revealed that after being turned into a vampire, the dark spirit that now controls Durkon is a servant of Hel.]]
* In ''Webcomic/EightBitTheater'', [[spoiler:the little kid who is orphanized by the Light Warriors]] is introduced and makes some minor appearances, until it's revealed that [[spoiler:it's Sarda's past self.]]
* Incidental characters in ''Webcomic/TheInexplicableAdventuresOfBob'' usually wind up with something more significant to do later on. [[GentleGiant Rocko Sasquatch]] is probably the best example, being introduced as just a quick joke--the huge scary guy Bob has to share a jail cell with for a couple of strips--and then returning two years later as a major character.
* In ''Webcomic/MenageA3'', [[BuxomIsBetter one of the many passer-bys who are impressed by [=DiDi=]'s assets]] shows obvious ACupAngst in the first panel [[http://www.menagea3.net/d/20090926.html here]]. She returns as a psych student who thinks she can treat [[DoesNotLikeMen Yuki's problems]]. The author uses a BrickJoke to establish that she's the same person. When first we [[http://www.menagea3.net/d/20100527.html see her again]], she's reading a pamphlet about breast enlargement.
* ''Webcomic/{{Drowtales}}'' has been running since 2001 so naturally has plenty of these, but perhaps the best example is [[spoiler:Sha'sana, who narrates the prologue and is seen for one page, and [[http://www.drowtales.com/mainarchive.php?order=chapters&id=40 was implied to have been killed]] by Snadhya'rune, until 25 chapters later when she's [[http://www.drowtales.com/mainarchive.php?order=chapters&id=1274 revealed to have survived]]]].
* In ''Webcomic/{{Homestuck}}'', from very near the debut of the first troll it was revealed that there were twelve of them, and in some panels of the kids' Pesterchum chumlists you can see their trolltags. All were introduced later; some stayed minor characters, others... ''[[AscendedExtra didn't.]]''
** Then there's [[spoiler: the alternate John who Terezi tricked into flying to his death. His death led to the Dave in his timeline going back and becoming Davesprite, but after that he was completely forgotten until dead Vriska meets him with a dream bubble, and thinking he's "her" John, takes him on a tour/date.]]
** Oh look, it's a little guy walking across the desert. Oh, he's found something with a [[ArcSymbol spirograph]] on it, hey, is that John? Oh, this Wayward Vagabond guy was the one talking!
** John is described early on as having a deep-seated hatred for Betty Crocker. It's mostly played for laughs, until the Doc Scratch intermission of Act 5 Act 2, where it's revealed that [[spoiler: Betty Crocker wasn't human, and is the Troll Empress, working for Lord English.]]
*** [[spoiler: The Empress herself is also a ChekhovsGunman, having been referred to in Feferi's introduction.]]
** In Act 6, we meet [[http://www.mspaintadventures.com/?s=6&p=006015 Jane Crocker]], [[spoiler: Nanna's teenage alternate]]. Her appearance was first previewed [[http://www.mspaintadventures.com/?s=6&p=003822 back in Act 4]], two thousand pages and about a year and a half prior.
** In [[spoiler: Jake]]'s letter to John, all the way back at the Act 4 epilogue, he mentions that somebody had to twist his arm to get him working on John's birthday present. Fast forward to Act 6, and [[spoiler: Jake talks to Calliope]], who mentions giving him some more arm twisting.
* In one strip of ''Webcomic/{{Shortpacked}}!'' a nameless woman working at a supermarket shows up. A while later she begins dating one of the main characters and became one herself. When the author went back and titled some of his earlier strips he called the one she appeared in "She'll Show Up More Later".
* In one of the first story arcs of DemonEater, we see a white giant. Later on, she's revealed to be a member of one of the strongest Demon Societies in the story.
* In ''Webcomic/ProphecyOfTheCircle'' this happens to a couple of tekk characters, mostly because the first chapter is told from the perspective of the tikedi, who are their enemies and can't communicate with them.
** Renn'tekk, who first appears as a random, nameless tekk wrecking havoc in a tikedi village, but becomes an important character after the first perspective-flipped chapter.
** Shan'rekk too doesn't get a proper introduction when he first appears, although in his case it's plainly visible that he's important, or at least [[MySpeciesDothProtestTooMuch a very unique tekk]].
* Like the ''FoxTrot'' example, in a ''Webcomic/PvP'' murder mystery arc, Francis is briefly shown, then fades as suspicion shifts to "Tom Bolero." Francis turns out to be the murderer.
* In ''{{Spacetrawler}}'', the apex speaker (and apparent BigBad) Kuu-Drahc is accompanied by an unnamed personal assistant when he heads a meeting of the GOB. Later, the protagonists learn that Kuu-Drahc is ''not'' the big bad, but takes orders from a ManBehindTheMan named Qwahntoo. Then they find out that Kuu-Drahc's "personal assistant" from earlier was actually Qwahntoo.
* ''Webcomic/TheOtherGreyMeat'' has a character named Chekov, who happens to be one of the few survivors of a failed raid on the BigBad.
* Robespierre in ''Webcomic/RustyAndCo''
* In ''{{Narbonic}}'' there's a young, cute blonde woman wearing round glasses. We see her a couple times in a bar where Dave is doing something bizarre. She plays the 'straight man' character in the scenes. We don't know anything about her. Until the final arc of the webcomic, when her identity is absolutely critical.
* "Webcomic/OctopusPie" is practically made by this trope. Hardly a single character gets introduced without getting back to the comic later.
* ''Webcomic/SplitScreen'': The bartender Jan meets at the beginning of the comic turns out to be Jeremy's old girlfriend, whom she didn't recognize after not seeing her for a decade (Natalie didn't bring it up because she thought Jan didn't like her that much). Natalie manages to bring Jan up to speed on what happened the night she (Jan) left town and what was really going on between her and Jeremy (Answer: [[TheBeard Nothing.]])
* ''Webcomic/{{Inverloch}}:
** In the first chapter, Shiara calls out to someone named Eron, thinking that he's followed her. He appears in Volume 4, revealed as Kayn'dar's brother [[spoiler:and the one who thought of sending Acheron on the quest, finding him expendable]].
** Eron goes on to gripe about an "unsightly half-elf" living in the city. [[spoiler:We don't find out until the very end that it's Varden's sister Marynn.]]
[[/folder]]

[[folder:Web Original]]
* Cockroach Jesus, introduced in the introductory post in ''[[TheRaptureLogs OH GOD THE RAPTURE IS BURNING]]'' was originally just a throwaway character meant to be a little warmup to all the craziness. Turns out [[spoiler:he is the BigBad, the emissary to [[BiggerBad The Rapture]], and destroyer of universes.]]
* Iron Liz makes her first appearance in the ''WebVideo/AtopTheFourthWall''[=/=]''WebVideo/TheSpoonyExperiment'' Crossover [[http://atopfourthwall.blogspot.com/2010/05/warrior-2-and-3.html Warrior #2 and #3]], saying "Wait. Who am I?", She made her first official appearance in the WebVideo/AtopTheFourthWall review of [[http://atopfourthwall.blogspot.com/2010/06/chain-gang-war-1.html Chain Gang War #1]]
** During a Christmas review, Linkara refuses to do YetAnotherChristmasCarol, even though the spirits keep arriving. The Ghost of Christmas Yet to Come gets a reaction from him... "Is that a robot hand?" It's the first appearance of [[spoiler:Mechakara]] within the reviews.
* Two of them in ''BrokenSaints''. The first is [[spoiler:the hobo Raimi meets near the alleyway, who seems to be nothing but another one of his hallucinations]]. The second is [[spoiler:the supposedly dead Lear Dunham, one of the co-founders of BIOCOM.]] In the end, [[spoiler:they turn out to be the same person. The freakin ''BigBad''.]]
* Many, many people in ''Literature/WhateleyUniverse'' works. Given that the stories center around the 600 or so students at the [[SuperHeroSchool Whateley Academy]] and their connections (plus the fact that the number of novels, novel chapters, short stories, novelettes, and vignettes now numbers over a hundred) it is sort of inevitable that characters seen in passing can become major players in later stories. Examples: Beltane (Kendall Forbes) gives the protagonists the campus tour on day one... and much later gets her own leading role in "For Whom the Belle Tolls", as well as other appearances. The Headmistress gives a speech on the first day of classes... and then turns out to also be the greatest superheroine around (in her spare time).
** One of the hot blondes that Phase sees in the cafeteria on her first day at Whateley Academy - the one who really stares angrily at her -- turns out to be an old enemy. Who then in later stories turns out to be the blackmailer. And then in a ''later'' story actually gets people to try to kill Team Kimba. And then in a '''later''' story takes over the Alpha clique and runs the student body, so she can ''really'' go after the heroes.
** At first, Cavalier and Skybolt only get mentioned to show how dangerous The Don really is, and why The Don runs the campus. They're central to the Fey and Generator story "Christmas Elves". And then what they do next drives a lot of the plots for Winter Term.
** One of the throwaway jokes early in the universe is about some girl at school who has the spirit ''of the squirrel'' and is a campus joke. She has now become a protagonist with her own stories, and in her combat final, she managed to beat one of the most dangerous bullies at Whateley in a simultaneous CrowningMomentOfAwesome and CrowningMomentOfFunny.
* [[http://www.youtube.com/watch?v=SeqZ6yMCZUM&feature=rec-HM-fresh+ div This]] five minute skit uses it twice! (Pay attention to the chaos that effects 2 characters...)
* During TheIrateGamer's review of ''VideoGame/SuperMarioBros2'', he makes a joke about the game only having one player by having another Irate Gamer briefly appear, asking if he could play. Towards the end of his review, he comes back, revealing that he's an EvilTwin.
* Two in ''ThereWillBeBrawl''. [[spoiler: Game and Watch]] had been seen around the city doing various tasks. [[spoiler: He actually is an EldritchAbomination, and is the "End of Days" meant to bring about the end of the world.]]
** [[spoiler: Ness and Lucas]] were seen playing in an alley, and served to remind Luigi of his motivation for fighting. [[spoiler: Then it gets turned on his head when he discovers ''[[CreepyChild they]]'' are the murderers.]]
*** [[spoiler: And that feeling of hope Luigi got from seeing them was artificially planted by their telepathy to keep Luigi fighting - which they found entertaining.]]
* From the ''GlobalGuardiansPBEMUniverse:'' The tall, impressive looking woman standing just behind and to the right of crimelord Baron Samedi in the early story that introduced Samedi as a DiabolicalMastermind? Yeah, it turns out that she's more than just Samedi's [[TheDragon Dragon]]. It turns out she's Battle, the mother of Stone, the former Global Guardian.
* Literature/TheDescendants does this a lot: Elizabeth von Stoker is introduced in Volume 1 as a GirlOfTheWeek and becomes recurring villainess Freaque in volume 2. Callie Kreiger is first seen as an almost faceless part of a GirlPosse in Volume 2, becomes an IneffectualSympatheticVillain in Volume 3 and finally helps save the city in Volume 4. Finally, Jay Willis starts as a random GangBanger in Issue three and becomes the Descendants version of TheJuggernaut in Issue 48!
* [[spoiler: Lance M Donovan]] who had made appearances earlier in ''ImAMarvelAndImADC'' before his significance showed up. In literal terms, we also have [[spoiler: the Punisher]] who shot the Joker when he was [[spoiler: holding Harley hostage to use as his escape.]] You know when [[spoiler: he said "I'm waiting for an opportunity to present itself"]], it was going to be awesome.
* Averted with the Professor in ''RomancingSaGa3''. They have a unique sprite, are conspicuously introduced, and have two different quests associated with them. Most other characters with all these traits can join your party... but the Professor is just a minor NPC with no relevance outside their associated quests.
* TheQuestportChronicles: So, that mage who shows up in the first quest of the third year? Yeah, turns out that [[spoiler:he was responsible for the destruction of Questport.]]
* ''SurvivalOfTheFittest'': Evolution has Khalid Shamoun, a "winner" of a previous experiment run, who first appeared [[spoiler:in the prologue, being shot by the scientists after mouthing off to show that they won't allow rebellion]]. Later he's put on the island as a player for the second time partway through. Another example, this time from the main site, would be Yelizaveta "Bounce" Volkova, who first appeared as a character in the in-universe chat and later made a appearance in the main game.
* Eric Rosethorn from ''TheQuestForGeekdom'' makes a brief appearance as a one shot character. Later he becomes [[spoiler: the big bad.]]
* Early in ''Film/ProjectMillion'', [[DiamandaHagan Diamanda]] pops the balling of a little boy at Disneyland, then steals his lollipop. [[spoiler: He later shows up to club her over the head and save Robert. Though he's really only after his lolly.]]
* In ''VisualNovel/LittleBusters'', Mio is the last girl to be formally introduced, but she makes a cameo only a couple of days in when Rin sees a girl while searching for members. After Rin1 is finished Rin will recognise her, but the first time around only her voice makes it clear who she is (though [[InterfaceSpoiler the fact that she's voiced at all makes it obvious she's someone important, anyway]]).
* ''Series/{{Noob}}'' introduced top player Fantöm in the ad that made early AudienceSurrogate Gaea buy the game in which the series is set. She enventually runs into him in-game and his team ends up being the series {{Deuteragonist}}. The younger brother Spararap mentions having in an early episode becomes essential in Season 1 finale [[spoiler:and is the healer of Fantöm's team]]. Minor character Castörga was briefly introduced in Season 3 finale and appeared in the Season 4 three-parter with a bigger role.
* In ''Literature/{{Worm}}'', Oliver is a minor character with a [[WhatKindOfLamePowerIsHeartAnyway seemingly useless power]] who has probably less than ten lines in the entire story. [[spoiler:His power ends up being instrumental in defeating the last BigBad.]]
* ''WebAnimation/{{RWBY}}'' silhouettes background characters, making it clear who's relevant to the plot. So when we see a fully-coloured stranger[[note]]Pyrrha[[/note]] watching Jaune in Episode 3, we know she's going to be important.
[[/folder]]

[[folder: Real Life]]
* Most Literal Example Possible: The assassination of the Archduke Franz Ferdinand was the last straw that led to UsefulNotes/WorldWarOne, which led to the TheGreatDepression, which led to Hitler's rise to power, which led to UsefulNotes/WorldWarII, which led to the Allies dividing Europe, which led to the Cold War, which led to the Russians invading Afghanistan, which led to the United States [[YourTerroristsAreOurFreedomFighters backing some unsavory types]], which ultimately led to 9/11. Not often does one assassination get to define a whole century.
** It may have happened anyway, Franz Ferdinand was just the excuse. Austria was going to invade the Balkans anyway. It is well documented, and public knowledge at the time, that the Balkans were a powder keg just waiting for a spark to set it off.
* Way, way back in TheRoaringTwenties, there was an unimportant art student which had been rejected from the Academy of Fine Arts in Vienna. He served in the German Army during WWI, and reached the unimportant rank of Lance Corporal. He joined a small, two-bit political party that was deemed dangerous by the police (he was originally a police spy, before the party won him over), but otherwise not even a blip on the political radar. This man's name? AdolfHitler.
** Made even creepier when you have a look at [[http://history1900s.about.com/library/holocaust/blhitler14.htm this photograph]] taken in the Munich Odeonsplatz when the First World War was declared. [[AdolfHitler Yes, he's back.]]
* Following the Russian Revolution and the establishment of the Soviet Union, there was a low level enforcer in the Bolshevik Party with the almost unpronounceable name of Iosef Besarionis dze Jughashvili. He managed to quickly rise through the ranks and changed his name to the much easier to pronounce, JosephStalin.
* A librarian at the University of Peking spent most of his free time reading and discovered some books by a guy named Karl Marx. This avid reader was named MaoZedong.
* There was also the carpenter from Galilee, as well as the Arabian merchant and the shepherd with the speech impediment. Both of them end up shaping the conflicts for the last 1500 years and continuing.
* Some obscure French officer name Napoleon, a prince from the backwater of Macedonia named Alexander, and this Asian guy who had a horde or something. What's a khagan?
* A 1916 newspaper printed a photograph of a little boy donating five cents to a fund for war orphans. That little boy was UsefulNotes/RichardNixon.
* In 1948, a no-name lawyer from the small city of Grand Rapids, UsefulNotes/{{Michigan}}, won a congressional seat in a surprise upset. Almost two decades later, this obscure Congressman--a fellow by the name of UsefulNotes/GeraldFord--became House Minority Leader, mostly because the Republican Party had suffered a huge defeat in 1964 and was outnumbered more than two-to-one by the Democrats; most people hadn't heard of him well into his term. Ford was introduced to the nation a little while later thanks to a speech he gave on the House floor in which he criticized the UsefulNotes/VietnamWar, as well as the numerous insults President UsefulNotes/LyndonJohnson hurled at him in response. A few years later, he was the 38th President of the United States. Bonus points for getting there without ever being elected President or Vice-President (he first replaced Vice-President Spiro Agnew after Agnew got involved in a tax evasion scandal, and then he got tapped for President after Watergate).
* The vast majority of elected officials, especially those from notably humble origins such as UsefulNotes/AbrahamLincoln and UsefulNotes/BarackObama, although humble origins are not a requirement: UsefulNotes/JohnFKennedy and UsefulNotes/GeorgeWBush were less important sons of powerful men who did not carry the weight of expectations that their siblings did... at least, not at first.
* After the assassination of President Abraham Lincoln on April 15, 1865, his funeral procession would travel from Washington, D.C. to his (almost) final resting place in his hometown of Springfield, Illinois (since his coffin has been exhumed numerous times afterward). One of the procession's stop would be on 14th Street and Broadway in New York City, on April 24, 1865. [[http://stolf.wordpress.com/2010/11/18/stolfs-blog-11182010/ A picture was taken of this procession]], and an open window is shown in the left-hand side of the photo. You can barely see, but two little boys are leaning out the window watching the procession go by. Those two little boys? They're future President Theodore Roosevelt and his brother Elliott Roosevelt, father of Eleanor Roosevelt.
* In 1919, a Vietnamese pastry chef (or dishwasher, sources are unclear) and student in Paris named Nguyễn Ái Quốc wrote a letter to the [[UsefulNotes/WorldWarOne Paris Peace Conference]] asking for French colonial domination of Vietnam to end. He was completely ignored. He then became a Communist, and traveled to the USSR to further his political education. He later returned to Vietnam to become a leader of the Vietnamese nationalist movement under the name he had assumed in Moscow--UsefulNotes/HoChiMinh. After World War II, he beat the French out of the country, and then led it as it slid into [[UsefulNotes/TheVietnamWar the famous war with the United States]].
* Mitt Romney started off as the [[http://en.wikipedia.org/wiki/United_States_Senate_election_in_Massachusetts,_1994 Republican candidate for Massachusetts' Senate seat in 1994]]. Jump ahead 18 years, and he's now the Republican candidate for President of the United States.
* One scary example comes in the form of Ted Bundy's background before he became one of the most infamous serial killers in modern American history. Years before his spree, he was a lowly intern lawyer who got caught up in a political scandal. Bundy gave an interview to the local media smiling, laughing, and denying any involvement in the scandal.
* In 2010, the San Fransisco Giants claimed outfielder Cody Ross for the sole purpose of keep him away from the division leading Padres, who were in desperate need of an outfielder. They planned on using him as a late inning defensive replacement. But he managed to make the postseason roster and become a pivotal part of their World Series team, winning NLCS MVP
* In a 2005 episode of The Simple Life, the farm family of the week, the Seberts, introduced us to their daughter "who is really into music": {{Kesha}}.
* A 1985 TV commercial for Kellogg's "Just Right" breakfast cereal featured an unnamed [[FieryRedhead redheaded]] woman playing the piano. We now know her as multiplatinum musician Music/ToriAmos.
* Some of the most famous generals of UsefulNotes/WorldWarTwo fought during UsefulNotes/WorldWarOne (George Patton, Charles de Gaulle, Bernard Montgomery, Erwin Rommel, among others).
* A lot of famous movie directors' could be described as this. Case in point, in 1953 a little-known photographer who had made a few short films and documentaries released a somewhat cheesy feature film titled ''Fear and Desire''. That man later went on to direct ''Film/TwoThousandOneASpaceOdyssey'', ''Film/AClockworkOrange,'' and ''Film/TheShining'', amongst other incredible films.
** In 1959, the director of the now-forgotten Roman epic ''Gli ultimi giorni di Pompei'' (''The Last Days of Pompeii'') fell ill and another man, some guy named Sergio Leone was brought in to replace him at the last second. Several years later, Leone was given a simple job- create a simple, low-budget Spaghetti Western re-using an old set to make up for the failure of a previous project. Looking for a cast he hired an actor at that point best known for his role in the tv series ''Series/{{Rawhide}}''. They worked together on this project, using what little they had, and created a film that turned out to be a surprising box office success, so the studio gave them a bigger budget for a sequel. They worked together once more, and created a second film that was even better, and got an even bigger budget to create yet another film- and they made ''Film/TheGoodTheBadAndTheUgly'', considered now one of the greatest movies ever made. The actor's name? Creator/ClintEastwood, who would go on to direct a number of movies himself and win a number of Academy Awards.
** In 1974, bad marketing resulted in the failure of college short-turned-feature ''Film/DarkStar''. The writer, disappointed about the results, decided to retool the script using the simple idea of a spaceship's crew chasing an alien. He ended up giving the script to an unsuccessful director who re-wrote the protagonist into a woman and decided to cast a young stage actress- and in 1979, the film was released under the title of ''Film/{{Alien}}'', propelling Ridley Scott and Sigourney Weaver to stardom.
*** At the same time, the director of ''Film/DarkStar'' started working on a few scripts of his own and went on to create classics such as ''Film/EscapeFromNewYork, Film/TheThing1982, Film/{{Christine}}, Film/{{Starman}}, Film/InTheMouthOfMadness'', and many others.
* [[TheHouseOfPlantagenet King Edward III of England]] had four sons: Edward of Woodstock (aka Edward, the Black Prince), Lionel of Antwerp, John of Gaunt, and Edmund of Langley. None of these sons became king after him, but are nonetheless extremely important because their progeny ended up fighting each other in the UsefulNotes/WarsOfTheRoses.
* In the Mexican–American War (1846–48), among those who distinguished themselves were a military engineer named Robert and a young quartermaster born Hiram. Both had a difficult time during the 1850s, but made a serious comeback in the 1860s, when Robert (E. Lee) rose to be general-in-chief of Confederate forces, and Hiram (Ulysses Grant) became Commander of the Union Army.
* In a way, most friends you make, especially in school, can be this trope. Think about it. How many of your friends were little more than "extras" in your life, sitting in the background at school or work, until they said or did something that made you want to befriend them? (And many of your friends can probably say the same for ''you''.)
[[/folder]]

----