[[foldercontrol]]

[[folder:A-D]]
* AbilityOverAppearance:
** The character Melinda May was originally going to be a white woman named Althea Rice. However, Creator/MingNaWen gave such a strong audition that the character was given a new name and rewritten to as Chinese.
** Daisy Johnson, who was depicted as a basic Caucasian woman in the comics, is portrayed by Chinese-American actress Chloe Bennet.
* ActingForTwo:
** In Season 2, Creator/ElizabethHenstridge plays both Simmons and [[spoiler:Fitz's hallucination of Simmons. The latter looks and acts more like her Season 1 self, but with occasional slips into Fitz's own personality.]]
** Also in Season 2, Ming-Na Wen plays both May and [[spoiler:Agent 33, who gets her May disguise fused to her face. Not only does she now play two roles, but one involves a quite complex makeup job for a while. And even when 33 gets the mask fixed, the voice remains broken so Wen continues to dub all her disguises.]]
** Creator/ChloeBennet also gets a brief turn at playing [[spoiler:Agent 33, as she tried to seduce Ward using Skye's appearance]].
** Alicia Vela-Bailey doubles as the stunt double for Mockingbird and as the actress for an Inhuman named Alisha Whitley (whose MesACrowd powers evoked this trope themselves).
** [[spoiler:Brett Dalton gets to play this in Season 3, as his character, Ward, gets possessed by Hive.]]
** [[spoiler:Ming-Na Wen plays both May and the Life Model Decoy of May, made by Aida, during the second arc of Season 4.]]
** [[spoiler:Creator/MalloryJansen has portrayed two separate bodies for Aida along with her human base, a woman named Agnes, and Madame Hydra in the Framework arc. The latter two share a scene together.]]
** [[spoiler:Radcliffe's actor has also portrayed an [=LMD=] version of Radcliffe.]] One could imagine that the list of examples of this trope is going to explode now that [=LMDs=] are a focus of the storyline.
** Creator/PattonOswalt played Eric Koenig ... then he played Billy Koenig ... then Sam Koenig ... then [[spoiler:Thurston Koenig, who's the last one. While Eric is dead, Billy; Sam; and Thurston have all been on screen at the same time in the episode "Hot Potato Soup".]]
** [[spoiler: At the end of "The Man Behind the Shield", Coulson, Mack, and Mace are all [=LMDs=] also. The next episode, "Self Control", reveals that there's also a Fitz LMD, and that there is also an ''entire room'' of Daisy [=LMDs=].]]
** [[spoiler: "The Devil Complex" gives us Iain De Caestecker playing two versions of himself, Fitz, and the Doctor as a figment of his conscience. Specifically, while Simmons was portrayed as a kind and mentoring illusion, the good angel; the Doctor wants nothing more than to solve the problems Fitz faces by any means necessary, the bad devil.]]
** In the Season 6 episode “Inescapable” Fitz and Simmons are trapped together in a shared mind prison where they relive memories and face personified versions of their own insecurities and issues. Iain de Caestecker plays both Fitz and [[spoiler:his Framework dark alter-ego, Leopold]], while Elizabeth Henstridge plays both Simmons and [[spoiler:a blood thirsty horror movie inspired version of her own Id, created by the feelings she’s repressed through years of multiple traumas.]]
* ActingInTheDark: In the first season, Creator/BrettDalton (playing Ward) [[spoiler:was only told when it was necessary for him to know that Ward was a HYDRA mole]], and the rest of the cast kept in the dark slightly longer. Creator/BillPaxton, on the other hand, was told right from the start that [[spoiler:Garrett was the Clairvoyant]] but none of the other cast was, allowing him the opportunity to play the LargeHam [[spoiler:BigBad pretending to be a good guy]] right from the start with the others in the dark.
* ActorSharedBackground:
** Daisy is half Chinese, half American. Creator/ChloeBennet is half Chinese, half American, only in her case her mom is American and her father is Chinese. To add to it all, Coulson serves as a father-figure, while May serves as a mother-figure to Daisy. [[spoiler:Their ethnicities coincidentally correspond to Daisy's birth parents, Calvin Zabo and Jiaying.]]
** A minor case; Fitz-Simmons both have the same birthdays and birth year as their actors, according to their ID badges and information given in the tie-in comics.[[note]]This slightly contradicts information given in the show, however; in a deleted scene from "Seeds", Simmons claims that Fitz is twenty-three days older than she is, while Iain De Caestecker is actually three months younger than Elizabeth Henstridge. So, while Simmons definitely shares her actor's birthday (as can be seen on her ID card in the show), the same may or may not be the case with Fitz. However, this seems to have been the subject of a minor {{Retcon}} in later tie-in comics, which make a point of having Fitz share his actor's birthday for the sake of a running in-joke [[ItMakesSenseInContext involving monkeys]].[[/note]]
** Creator/BrettDalton and his character Grant Ward share the same birthday.
** Melinda May is a first-generation Chinese-American like Ming-Na.
** Coulson says in "Laws of Nature" that Simmons' family are in Sheffield, which is Simmons' actress Creator/ElizabethHenstridge's home town.
** Agnes, the physical inspiration for the LMD Aida, is Australian like her actress.
** Like his character Mack, Creator/HenrySimmons is a devout Christian.
** Creator/GabrielLuna, like his character, grew up without his father and had to be the man of the house in his immediate family. He also has a brother who he was very close with.
* ActorInspiredElement:
** Fitz's love for monkeys was inspired by [[Creator/IainDeCaestecker Iain De Castecker]]'s own love for monkeys.
** DIANA, the brain implant that Simmons uses to supress her memories in Season 7 to protect her mind from the Chronicoms, is the name of Elizabeth Henstridge's engagement ring.
* AscendedFanon:
** One of the biggest cases ever. Coulson's death being undone in numerous fanfics and such spawned this entire TV show.
** Nearly happened again by having Victoria Hand and Isabelle Hartley become a couple, which was a popular theory due to Hand's girlfriend in the comics being named Isabelle. That was until the writers realised the implications attached to introducing two gay characters and then [[spoiler:[[BuryYourGays killing them both off almost immediately]]]]. The familiar way Isabelle Hartley talks about "Vic" in a flashback hints this may have become unspoken canon.
* AscendedMeme: As seen in FanNickname, the name "Kreeapers" for the Kree Reapers was invented by the fandom, and becomes canon when the characters use it in the Season 5 premiere.
* CaliforniaDoubling:
** Many of the exteriors are clearly shot in the Los Angeles area, with only a wider establishing shot to set it as someplace else.
** Los Angeles (specifically, L.A. Chinatown) doubles for Hong Kong in "Girl in the Flower Dress".
** Los Angeles City Hall can be seen in the skyline from the S.H.I.E.L.D. Academy of Science and Technology in "Seeds".
** A rare aversion on the series occurs in "...Ye Who Enter Here" — around the second half of this episode takes place in Puerto Rico, and it indeed had location shooting in Puerto Rico.
* CareerResurrection: Creator/NataliaCordovaBuckley almost quit acting until she laned the role of Yo-Yo Rodriguez in Season 3.
* TheCastShowoff:
** Both Creator/ClarkGregg and Ming-Na Wen have martial arts training and use it in the show.
** Ming-Na speaks fluent Cantonese, which she uses to show Melinda May's BilingualBonus. She grew up in British Hong Kong and Portuguese Macau before moving to America with her family.
** In "The Dirty Half-Dozen", Chloe Bennet did all the fighting in TheOner without a stunt double.
** Karate champion Mark Dacascos naturally gets to fight May.
* {{Corpsing}}: In "F.Z.Z.T.", Jemma's actress Elizabeth Henstridge is pretty clearly ''laughing'' in the scene where she's plummeting towards Earth, and Ward is trying to rescue her.
* CreatorCouple: Jed Whedon (the younger brother of Creator/Joss Whedon, the director of the first two Avengers) and his wife Maurissa Tancharoen are the showrunners of the series.[[note]]Joss himself had a significantly smaller role than most other Creator/MutantEnemy projects due to being busy with ''Film/AvengersAgeOfUltron'', and eventually left Marvel after ''Age of Ultron'' was finished.[[/note]]
* CreatorBacklash:
** Creator/JossWhedon thought that he could bring Coulson [[DeathIsCheap back from the dead]] for the series without cheapening what his death meant in ''Film/{{The Avengers|2012}}''. Unfortunately, he found out that death in the cinematic universe isn't as cheap as it is in the comics and wanted to keep the movies and the show separate from each other, meaning Coulson can still be considered dead in the movies. Despite this, the show and the movies continue to influence each other, albeit tangentially through occasional references. Although it should be noted that Whedon did consider revealing that Coulson was alive to the Avengers in the film - he decided against it at least partially because it would take focus away from the main plot too much.
** Chloe Bennet has been vocal on how the higher ups of Marvel Film ignore the shows and flat out said "People who make movies for Marvel, why don't you acknowledge what happens on our show? Why don't you guys go ask them that? Cause they don't seem to care!".
** Ian Hart, who played Franklin Hall, has voiced his anger towards the series, due to having been promised an important recurring role which ended up getting reduced to a single episode appearance due to the shifting changes behind the scenes.
** Creator/ClarkGregg, who is a big fan of Daredevil and Iron Fist, has lamented how the "lawyer stuff" behind Marvel Television prevented the show from crossing over with the Netflix Marvel shows, even though there are several references made to each other within the shows. He specifically wanted the opportunity for Coulson to meet Danny Rand, which would be a geek out moment for him.
** Overall, Marvel Studios was not a fan of this show's creation from the very start, as they felt that Whedon's plans for the series clashed greatly with their movie plans, particularly since they wanted Whedon to step back into the director's chair for ''Film/AvengersAgeOfUltron''.
* TheDanza: In season 7, the Chronicom known as Luke has his original form portrayed by Luke Baines, before he [[KillAndReplace assumes]] a new form wherein his actor becomes Tobias Jelinek. The name "Luke" indeed fits in with the ThemeNaming of the Chronicoms, who are each named after a [[BiblicalMotifs Biblical]] figure.
* DawsonCasting:
** [[InvertedTrope Inverted]] with Daisy. Chloe Bennet is four years younger than Daisy.
** Played straight with Creator/DoveCameron who is appoximately three years older than Ruby.
** Dianne Doan is about a year older Chloe Bennet, while her character Kora is appearst to be in her late teens/early twenties.
* DeletedScene: The home release of Season 2 contains scene from the finale "S.O.S.", where a flashback to the day of Daisy's birth was cut. Jiaying tells Cal to promise her that if anything happens to her, that he would protect Daisy. This is seemingly the promise that Cal mentions before killing Jiaying in the climax.
* DevelopmentGag: A slight one. The DVDCommentary for ''Film/IronMan3'' reveals there was supposed to be an Extremis explosion at Union Station. There is almost an Extremis explosion at Union Station in the pilot.
* DirectedByCastMember:
** Creator/ClarkGregg had directed an episode in Season 5, and another one in Season 6. Bonus points for the actor who portrayed the Director of S.H.I.E.L.D. becoming a literal Director of S.H.I.E.L.D.
** Creator/ElizabethHenstridge, who plays Jemma Simmons, made her directorial debut in Season 7 Episode 9.
* DuelingWorks:
** With ''Series/{{Arrow}}'', as both series fall under the long-standing Creator/DCComics[=/=]Creator/MarvelComics rivalry. Later on, one could add ''Series/{{Gotham}}'' and ''Series/TheFlash2014'' to that list.
** As of season 3, emphasis on building a team of superpowered people will bring it right into competition with ''Series/LegendsOfTomorrow''.
[[/folder]]

[[folder:E-M]]
* EnforcedMethodActing:
** Brett Dalton noted on an [[http://marvel.com/news/tv/2014/4/8/22302/exclusive_brett_dalton_on_agent_wards_new_role_in_marvels_agents_of_shield interview]] with Marvel after "Turn, Turn, Turn" that [[spoiler: he was informed that Ward would be revealed as a HYDRA agent near the ending of filming for "Yes Men", two episodes before the reveal]]. Assuming this was planned from the start, it means that he [[spoiler: played Ward as an authentic good guy, making his deception more surprising when the time came.]]
** Meanwhile, in an [[http://www.hitfix.com/the-fien-print/interview-agents-of-shield-co-star-bill-paxton-on-the-finale-and-feeling-the-universe interview with HitFix]] before the season finale "Beginning of the End", Bill Paxton [[spoiler: was informed his character was the BigBad and a member of Hydra right as he was hired, before anybody else on the set knew. So Paxton was allowed to play Garrett as a bad guy knowingly playing a good guy, whereas the rest of the cast were in the dark for quite a while... including Creator/ClarkGregg!]]
** Upon being cast, Chloe Bennet wasn't informed that her character would be revealed as Daisy Johnson, which helped make her character more original instead of trying to take aspects from the source material while also keeping audiences from predicting the eventual reveal.
** Simmons' voice is unusually weak and raspy-sounding after waking up from where she was buried in "What If". Elizabeth Henstridge was quite ill while filming the episode, so she really was as sick as she sounds.
* ExecutiveMeddling: The series struggled through an excruciatingly stretched-out first season. Marvel and ABC's parent company Disney wanted to use episodes of the show to promote both ''Film/ThorTheDarkWorld'' and ''Film/CaptainAmericaTheWinterSoldier'' so the show had to go on multiple mini-hiatuses to wait for those films to premiere. Also, because of the game-changing nature of ''The Winter Soldier'', the producers had to use more than a few filler plots to pad out the first season before being able to dive into major plot twists that also marked an uptick in quality and pacing. To make matters even worse, the second half of that first season was also preempted for over two months due to the Sochi Olympics. The execs realized that this wasn't helping the show so, starting from the second season, Agents aired in two, largely uninterrupted blocks, in the fall and in the spring with a winter break to allow for the broadcasting of ''Series/AgentCarter''.
* ExiledFromContinuity: [[http://splashpage.mtv.com/2013/09/24/mutant-marvels-agents-of-s-h-i-e-l-d/ According to]] WordOfGod, the show couldn't use any ''ComicBook/XMen'', ''Comicbook/FantasticFour'', or ''ComicBook/SpiderMan'' characters since [[Film/XMenFilmSeries their]] [[Film/FantasticFour2015 film]] [[Film/TheAmazingSpiderMan rights]] were still owned by [[Creator/TwentiethCenturyFox Fox]] and Creator/{{Sony}} respectively.[[note]]As of February 2015, Sony has struck a deal with Marvel to reboot Spider-Man and bring him into the MCU. Whether this deal extends to Spiderverse references in the TV shows is yet to be seen (''Series/{{Iron Fist|2017}}'''s Italian dub references Spider-Man, but not the other dubs.) Disney has also since been able to purchase Fox only four years later, which removed all legal barriers that involved the X-Men. [[/note]] They couldn't even use ''the word'' "Mutants," which is why similar terms like "Gifted" are used to describe characters like Scorch. It's reinforced every time someone insists psychic powers aren't real. In the ''Film/XMenFilmSeries'', it's clear everyone (at least in positions of authority) knows that they certainly are. The presence of superpowered individuals is likewise considered a new thing to the general public in the Franchise/MarvelCinematicUniverse, whereas ''X-Men'' not only had very public displays of superpowers, there was a political campaign about registering people with them.
* FakeAmerican:
** Englishwoman Creator/SaffronBurrows as American Victoria Hand.
** Irish-Ethiopian Ruth Negga as Raina, who speaks with an American accent, and eventually reveals that she grew up in Thailand.
** Gordon has a Brooklyn-sounding accent, but is played by British actor Jamie Harris.
** Lincoln has an American accent, but he's played by Australian actor Luke Mitchell.
** New Zealander-Irish Creator/LucyLawless portrayed American Isabelle Hartley.
** Inverted. American actor Reed Diamond portrayed Werner Reinhardt/Daniel Whitehall, a German. Although since Whitehall is Reinhardt's fake ''American'' alias, the actor gets to use his normal accent most of the time.
** Australian actress Mallory Jansen plays Aida, who has an American accent. [[spoiler:Agnes, Dr. Radcliffe's ex-girlfriend whose appearance he modelled Aida after, is an Aussie though]].
** English actress Parminder Nagra plays American senator Ellen Nadeer.
* FakeNationality: Several.
** Englishman Ian Hart as Canadian Franklin Hall.
** Sunil Bakshi is likely supposed to be of South Asian-British descent based on his name, but he's played by Greek Cypriot-British actor Creator/SimonKassianides.
** Jiaying is Chinese, she's portrayed by Nepalese-Australian Creator/DichenLachman.
** Elena is Colombian and portrayed by Mexican actress Natalia Cordova-Buckley.
* FakeRussian:
** Eva Belyakov, a Russian, is portrayed by American actress, Winter Ave Zoli. Her daughter Katya is portrayed by Ava Acres, another American.
** American actor Creator/ZachMcGowan portrayed Russian Anton Ivanov.
* FandomNod: In "The Only Light in the Darkness" it's revealed the orphanage Skye grew up at named her MarySue Poots. Skye had previously been accused of being a MarySue by detractors of the character.
* FridayNightDeathSlot: Season 5 was hit with this, and the writers even planned to write the season finale as a potential '''series''' finale in the event that this trope kept their show from being renewed. However, the show managed to survive and get a 13-episode Season 6, along with getting another 13-episode order for Season 7 a few months later when Channing Dungey left ABC. While season 6 keeps the Friday time slot, it’s not quite a kill, but a two-year ride into the sunset.
* HideYourPregnancy: Dichen Lachman was pregnant during the time of shooting Season 2, hence why her wardrobe is always loose fitting.
* InMemoriam:
** The episode "What If..." is dedicated to the late Creator/BillPaxton, who played John Garrett/the Clairvoyant, the BigBad of Season One, and passed away in February 2017.
** "World's End" has a dedication to Creator/PowersBoothe, who played Gideon Malick (another Hydra bad guy, coincidentally) and died in May 2017, just two days before the episode first aired.
* LyingCreator: Early reports from the crew on Powers Boothe's character in the show, Gideon Malick, were that he would be [[YouLookFamiliar a different character]] from the one he played in ''The Avengers''. When he actually appeared in the show, it turns out they were one and the same.
* MilestoneCelebration: Season 5's "The Real Deal" is the show's 100th episode and has several aspects to celebrate it -- the SpecialEditionTitle has a montage of every custom logo used over the course of the series, several past antagonist return (albeit just as illusions) and [=FitzSimmons=] get married. There are also some (very) fast flashbacks showing Daisy's evolution as a character. In addition, this 100th episode of the first MCU TV series aired in 2018, which happens to be the year that marks the 10th anniversary of the MCU.
[[/folder]]

[[folder:N-R]]
* NamedLikeMyName: "The Rising Tide", the hacktivist group Skye is part of, is also the name of a RealLife climate change activist group. The real life organisation Rising Tide is not pleased with the series using the name, since fans have confused them for some super hacker group (when in reality they're just a normal protest group).
* NetworkToTheRescue: While [[ScrewedByTheNetwork ABC seems to do whatever to try and force the show's cancellation]] -- with Season 4 originally intended to be the final season -- [[https://variety.com/2017/tv/news/abc-idol-inhuman-1202573827/ higher-ups at Disney wanted a Season 5]] because they saw the show as free advertising for the Franchise/MarvelCinematicUniverse movies. And just when it seemed as though the show was on the bubble of cancellation with the end of Season 5, ABC agreed to compromise with Disney by doing a 13-episode Season 6 to save on budget, with a Season 7 of another 13 episodes filmed immediately afterward to take advantage of the cast's schedules.
* PlayingAgainstType:
** [[spoiler:Creator/BillPaxton]] starts out playing his normal role of a tough ActionHero... until it turns out he's Season 1's BigBad. And, boy, [[EvilIsHammy is he]] [[ChewingTheScenery enjoying it]].
** Creator/BradDourif [[spoiler:was literally brought in just to sit in a chair for a few minutes, saying and doing absolutely nothing before getting killed, just so the audience would believe he was the Clairvoyant rather than Garrett's patsy.]]
* PostScriptSeason: The series was expected to get cancelled after Season Five, which is why it ended with Coulson being allowed to [[YourDaysAreNumbered die in peace]] and the team on an AndTheAdventureContinues mission in the episode named [[Recap/AgentsOfSHIELDS5E22TheEnd "The End"]]. The show was then unexpectedly picked up for two more seasons, forcing the creators to find a way to bring Creator/ClarkGregg back twice without resurrecting Coulson again.
* ProductionPosse:
** Creator/JAugustRichards from ''Series/{{Angel}}'' and Creator/RonGlass from ''Series/{{Firefly}}'' (both of which are previous works of Creator/JossWhedon) appear in the pilot episode.
** Creator/AmyAcker, who also starred in ''Angel'' as well as several of [[Series/{{Dollhouse}} Whedon's]] [[Film/TheCabinInTheWoods other]] [[Film/MuchAdoAboutNothing2012 projects]], plays Audrey the Cellist, the previously unseen love interest Coulson's been mentioning since ''The Avengers''.
** Creator/ReedDiamond, who played recurring character Laurence Dominic on ''Dollhouse'' as well as Don Pedro in ''Much Ado About Nothing'', plays Daniel Whitehall, the first BigBad for season 2.
** Creator/DichenLachman, who plays Sierra on ''Dollhouse'', plays Jiaying.
** Creator/SpencerTreatClark (Werner von Strucker) previously worked with Joss Whedon in Whedon's adaptation of ''Theatre/MuchAdoAboutNothing''.
* PromotedFanboy:
** Creator/ClarkGregg is a long time Marvel comic fan, having grown up watching various Spider-Man TV shows and reading comic books. He was a big fan of the characters Daredevil and Iron Fist, and was saddened that his character wasn't able to crossover into those respective series.
** Creator/PattonOswalt: Patton was very excited to join the series, as he was a big Marvel comics fan and enjoyed the first few episodes of the show before being cast.
** Creator/SimonKassianides was a comic book collector as a kid, with Daredevil being one of his favorites. He was already a fan of the series before being cast as Bakishi in season 2, having nothing but praise for the show's first season.
** Creator/AdriannePalicki was a fan of comics in general, having been influenced by her brother, who is a comic book writer. Upon being approached for the part, she was initially hesitant in accepting, as she thought she would never get the chance to play another Marvel character again if she did.
** Creator/GabrielLuna: He grew up sharing a love for reading Marvel comics with his younger brother, and the original Ghost Rider was among his favorite characters. When first approached to be on the show, he was hesitant to accept, as he was only being offered a recurring role. Once he was told that the character would be Ghost Rider, he immediately changed his mind.
** Creator/JasonOMara: He has mentioned that reading comics was a big part of his childhood,
* RealLifeRelative:
** In "Identity and Change", Coulson's female student who enters the classroom early is played by Creator/ClarkGregg's daughter, Stella Gregg.
** Creator/DichenLachman (Jiaying) and Maximilian Osinski (Agent Davis) are married in real life.
** In "Hot Potato Soup, the photograph of a young Fitz with his mother is a real life picture of Iain de Castecker and his mother, Linda.
** Robin Hinton is played at age 7 by Lexy Kolker and [[TimeShiftedActor at age 12]] by her sister, Ava.
** The young version of John Garrett is portrayed by Creator/BillPaxton’s real life son, [[Creator/JamesPaxton James]].
* RecursiveAdaptation: ComicBook/{{SHIELD}} was created in comics, then included in the MCU films, then expanded in a TV series, and then the TV series had a comic book adaption.
* RecycledTheSeries: It's sort of one to the MCU, though it helps that it features an element that hasn't taken center stage in the movies.
* RomanceOnTheSet: Creator/ChloeBennet began dating Creator/AustinNichols for nearly four years after the latter guest-starred as Skye's no-good boyfriend Miles Lydon.
** Creator/ElizabethHenstridge had been in a relationship with Zachary Abel two years prior to him appearing as Tad, a SHIELD cadet.
[[/folder]]

[[folder:S-Z]]
* ScrewedByTheNetwork:
** The series is aired by Sony for Latin America. For some reason, the color tone has been changed from the original series, and in scenes that were originally shot in low-light, it is so dark that it is next to impossible to understand what is going on unless you rely on the characters' exposition.
** The series was caught in a feud between Marvel Studios (who made the MCU films) and Marvel Television (who made the MCU TV series).[[note]]The reason is basically that Marvel Studios kick-started the MCU from zero, Disney bought Marvel, and Marvel Television exploited it; so MS basically felt that MT was piggy-backing off their work[[/note]] The first conflict started when the TV series had just been confirmed: only two days later they were informed that an upcoming film, "The Winter Soldier", would dismantle S.H.I.E.L.D., basically blowing up the show's premise.
** The staff and storylines of the film side of the Franchise/MarvelCinematicUniverse seem to deliberately go out of their way to avoid giving any recognition whatsoever to the series and its characters -- while ''Agents of S.H.I.E.L.D.'' often incorporates or references plot points from the movies in critical and even series-changing ways. It's not without some ThrowTheDogABone moments, though, such as rare guest appearances from ComicBook/NickFury (Creator/SamuelLJackson), ComicBook/MariaHill (Creator/CobieSmulders) and ComicBook/LadySif (Creator/JaimieAlexander), having some objects from the show appear in the films, even if not importantly (such as Fury's laser cutter in ''Film/CaptainAmericaTheWinterSoldier'', which was an invention of Fitz), as well as getting to use the CGI model of the Triskelion from ''The Winter Soldier'' for the Framework arc in Season 4.
** Creator/{{ABC}} seems to be deliberately trying to [[WhyWontYouDie kill off the show]] as well. Even after all the scheduling issues that plagued the first season, later on when Season 4 came along, the series was pushed back from its previous 9:00 PM timeslot on Tuesdays to one starting at 10:00 PM, which [[ForegoneConclusion predictably]] led to a further drop in live ratings (and to a lesser extent on DVR). When the series endured ''that'' to get renewed for Season 5, the network announced that it would be shifted ''again'' to a new timeslot on [[FridayNightDeathSlot Fridays at 9:00 PM]], ''and'' it would only start airing ''after'' the [[BritishBrevity eight-episode premiere]] of ''Series/{{Inhumans}}'' concluded in the late fall. ''[[HumiliationConga And then]]'' the show took a very public budget cut.
* ShipperOnSet:
** Creator/ChloeBennet and Creator/ElizabethHenstridge (the actresses who portray Skye and Simmons respectively) have both said that support for the Skye/Simmons (Skimmons) ship. Bennet even did a Reddit AMA where she responded to a question about Skimmons with "[[https://www.reddit.com/r/IAmA/comments/1rsdfn/comment/cdqdnjc/ I SHIP THAT SHIT SO HARD.]]"
** Creator/ClarkGregg and Creator/MingNaWen have made positive comments about their characters being shipped together. [[https://www.youtube.com/watch?v=xHvkk5TSlUQ&feature=youtu.be Gregg has even said that he can see where they're coming from]].
* SparedByTheCut: In the middle of the first season, CorruptCorporateExecutive Ian Quinn escapes with the crate of Gravitonium. A scene originally showed a fellow unwitting agent of HYDRA, Raina, killing him by letting the mysterious element consume him but it was removed, leaving the character and plot device open for a return.
** Ultimately [[SubvertedTrope subverted]], as the show brought back the Gravitonium plot but the actor playing Quinn [[RealLifeWritesThePlot had retired from acting]]. The showrunners decided to simply put the cut scene back into the show, which had killed off Raina herself two seasons prior, leaving the character's fate neatly resolved with no further explanation required.
* ThrowItIn:
** In "Nothing Personal", Creator/JAugustRichards [[http://www.assignmentx.com/2014/exclusive-interview-j-august-richards-on-marvels-agents-of-shield-part-1/ improvised]] patting Ward on the cheek after restarting his heart.
** According to Clark Gregg, Fitz's line to Gordon in "S.O.S., Part 2" was just "science." Iain ad-libbed the "biatch."
** Toward the end of "Bouncing Back", when Fitz and Simmons re-established their friendship, they fist-bumped each other as the camera pulled away from them. The fist-bump was ad-libbed but worked for them both.
** In "Know Your Onions", Ernest Koenig's last line "This looks like the start to a marvelous friendship" was ab-libbed by Patton Oswalt. The line itself is a play on the final line in the movie Film/Casablanca,
* TrollingCreator:
** B.J. Britt being spotted on the set of ''Film/AvengersAgeOfUltron'' seemingly spoiled the fact that his character, Triplett, would survive the events of Season Two, as it had already been supposedly revealed that some ''Agents of S.H.I.E.L.D.'' characters would appear in TheStinger. This being a Creator/JossWhedon production, however, a few fans were banking on a double bluff, with the "accidental" sighting deliberately engineered by the writers. They were right: [[spoiler:Trip dies in the mid-season finale]], and in the end, [[ExiledFromContinuity none of the series' characters appear]] in ''Age of Ultron'' at all.
** Creator/BrettDalton has a habit of fanning the flames of the [[DracoInLeatherPants Stand With Ward movement]], by giving [[WordOfSaintPaul his own interpretations]] of Ward's actions. This is all despite the fact that they tend to be at odds with Ward's actions on screen (then again, considering it's [[NeverMyFault Ward]], this may be completely intentional).
* WhatCouldHaveBeen:
** Creator/NicholasBrendon let slip during a panel at the Albuquerque Comic Expo that he and Creator/JAugustRichards were the last two choices for Mike Peterson.
** Melinda was originally going to be a white woman named Althea Rice. Ming-Na Wen gave such a strong audition that the character became Chinese and her name was changed.
** "[[Recap/AgentsOfShieldS1E7TheHub The Hub]]" was written to exploit the real-life friendship of Brett Dalton and Iain De Caestecker. It is the first episode to air after the premier of ''Film/ThorTheDarkWorld'', and the following episode "The Well" covers the crossover elements. This along with the fact that Episode 10, "The Bridge" ends on a cliffhanger before the show returned the following year with "The Magical Place" strongly suggests that before "The Hub" was written, episodes 8-11 were meant to be aired as #7-10; ending the year 2013 with a two-part, mid-season finale.
** It's been confirmed that [[spoiler:Triplett]] was originally more of a MauveShirt - he was going to die in the Season 1 finale around the same time as [[spoiler:Garrett]] did, but his popularity and likability with the production team (and [[EnsembleDarkhorse fans]]) led to his getting a half-season reprieve before finally biting it in season 2 [[spoiler:being killed by the Terrigen that turned Raina and Skye into Inhumans]]. For that matter, [[spoiler:Grant Ward]] is rumored to have been considered for death in the same season finale before they decided he had too much potential to be killed off that quickly [[spoiler:prolonging until the mid-season finale of season 3, where Coulson finally kills him, and the new BigBad Hive then possesses his corpse for the rest of the season]].
** A spinoff involving Lance Hunter and Mockingbird, ''Marvel's Most Wanted'' was planned for a 2015 release, but it was shelved in favor of giving ''Agent Carter'' another season. It was revisited a year later and a pilot was featuring Delroy Lindo as Dominic Fortune was shot, but ABC ultimately passed on ordering the series, [[spoiler: causing Lance to [[TheBusComeBack return]] in season 5 in a guest role, though Adrianna Palicki's obligations to ''Series/TheOrville'' presumably kept Bobbi from doing the same]].
** An extended scene on the Season 2 DVD with Bobbi and Agent Calderon implies that the Enhanced HYDRA asset that Weaver fought at the academy was about 8 ft. tall and had skin like steel. Presumably, it got cut because it was too close a reference to Colossus from X-Men.
** [[http://screencrush.com/joss-whedon-agents-of-shield-coulson-marvel-tv/ There were plans to use Loki's scepter from the original ''Avengers'' movie during the show]], but the idea was scrapped due to ''Age of Ultron''.
** There were discussions about having Creator/EmilyVanCamp reprise her role as [[ComicBook/Agent13 Sharon Carter]] from the movies, but her commitments to ''Series/{{Revenge}}'' prevented this.
** A storyline involving [=MODOK=] was originlly planned, but Marvel Studios revoked their ability to use him. Presumably, the story would have centered around the Superior, who already had numerous {{Mythology Gag}}s to the character.
** Crystal from ''Series/{{Inhumans}}'' was announced to be making an appearance in Season 5 shortly before that show started. Then its horrific reception caused them to walk back on whatever the plan was.
** After adding Agent Sousa in the final season, there was some hope to use the season's time travel story to reveal that Enver Gjokaj's small role as a cop in ''The Avengers'' was actually Sousa, but they couldn't figure out how to make it work on top of all the other timeline issues of the season.
** A [[TheStinger post-credits scene]] for the finale "[[Recap/AgentsOfSHIELDS7E13WhatWereFightingFor What We're Fighting For]]" was [[https://ew.com/tv/agents-of-shield-series-finale-cast-fate/ planned but never filmed]], which would have had Deke becoming the {{expy}} of the original Nick Fury as he already served as the series's {{expy}} of Star-Lord, in which he would don the iconic eyepatch.
** Played straight with Daisy, [[WordOfSaintPaul Chloe Bennet]] [[https://twitter.com/CANARYSlSTERS/status/826195921310466048 has stated]] that she personally considers Daisy bisexual, but this has never come up in the story or been acknowledged by the writing staff.
* WriteWhoYouKnow: Showrunners Jed Whedon and Maurissa Tancharoen (a real-life CreatorCouple) have admitted they based quite a bit of Fitz and Simmons on themselves, which is likely why their romantic arc plays such a big role in the series.
* WrittenInAbsence: Iain De Caestecker was filming a movie during the first few episodes of Season 5, thus necessitating [[spoiler: Fitz being the only member of the team left behind on modern-day Earth when Enoch transports the rest of the team through time.]] In season 7, once again due to De Caestecker's filming schedule with other projects, [[spoiler: he only appears in the last three episodes of the season (albeit admittedly a much shorter season than 5), and is no longer officially part of the main cast]].
* WrittenInInfirmity: Creator/MingNaWen was recovering from knee surgery during filming in mid-2017, so the writers gave her a leg wound for the first few episodes of Season 5.
* YouLookFamiliar:
** Dominic Rains, who plays Kasius in season 5, previously appeared in ''Film/CaptainAmericaTheWinterSoldier'' as a CIA instructor.
** Peter Mensah, who plays Qovas in season 5, previously appeared in ''Film/TheIncredibleHulk2008'' as General Joe Greller.

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