* AbilityOverAppearance: The producers had a choice between keeping Slade Wilson as an American, like in the comics, and casting Maori actor Creator/ManuBennett in the role. They took the second option and turned Slade into an Australian spy.
* ActorAllusion:
** Thea describes Roy Harper as 'Abercrombie-looking'. Guess which company his actor modeled for? Revisited in "Broken Dolls", where Sin also keeps calling him ''Abercrombie''. It becomes her AffectionateNickname for him.
** Barry mentions that [[ICantDance he can't dance]]. [[Series/{{Glee}} Some might disagree]].
** A flashback in "Heir to the Demon" reveals that Mrs Lance was a Professor. Creator/AlexKingston has played a Professor [[Series/DoctorWho before]].
** Tatsu is handy with katanas, just like Yukio, the character Rila Fukishima played in ''Film/TheWolverine''.
** The ''Series/{{Spartacus}}'' alumnae also get this. Katrina Law's character is still an ArcherArchetype ActionGirl, while Manu Bennett and Nick E. Tarbay's characters are (as of Season 3 Episode 8) [[spoiler: now cellmates (in ''Spartacus'', the gladiator quarters is very much like an "open prison")]].
* CreatorBacklash: A mild example, compared to others -- Stephen Amell has quite happily gone on record with his displeasure over the marketing for Season Two...namely that the posters highlight the ensemble cast, but leave out Paul Blackthorne and Susanna Thompson. He similarly criticized WB for announcing plans for a ''Flash'' film and a new actor the day after ''The Flash'' posted strong second-week ratings, showing true staying power, feeling it undercut both the show and Grant Gustin.
* DuelingShows: With ''[[Series/AgentsOfShield Agents of S.H.I.E.L.D.]]'', as both series fall under the long-standing DCComics[=/=]MarvelComics rivalry.
* FakeNationality:
** Stephen Amell, the Arrow himself, is Canadian.
** As is Emily Bett Rickards (Felicity Smoak).
** Manu Bennett ([[AussiesWithArtillery ASIS commando]] [[spoiler: Slade Wilson]]) is a New Zealander.
** Jessica de Gouw (ComicBook/{{Huntress}}) is Australian.
** Paul Blackthorne (Quentin), Creator/JohnBarrowman (Malcolm) and Creator/AlexKingston (Dinah) are all British, though all three have extensive US experience, with Barrowman holding dual nationality.
** Speaking of Aussies, Digger Harkness is Australian in the comics, but here played by Lebanese-American NickTarabay.
* FanNickname:
** Fans have started calling [[http://www.greenarrowtv.com/first-look-at-arrows-huntress/12378 The Huntress]] of this show "ComicBook/{{Catwoman}} with a Crossbow."
** Diggle is the Black Driver.
** Felicity is Bitch with Wi-Fi.
** Roy is Abercrombie.
** Diggle's unborn child has already been named [[Anime/{{Pokemon}} Diglett.]]
** Sally the Salmon Ladder.
** Deathstroke and Brother Blood's Mirikuru-empowered minions are referred to as the Deathstrokes, or some variant of, by many fans, though aren't actually named in the show itself. One of the alternative names is 'The Blood Cult'.
** Laurel has been given nicknames such as Blackmail Canary (due to her habit to use blackmail on Kate Spencer during the latter half of Season 2) or Fakanary (thanks to some people considering that Sara is the show's true BlackCanary)
** Stephen Amell himself has been nicknamed 'Captain Amell' or 'The Captain' by Olicity supporters, thanks to his enthusiasm for Oliver and Felicity's relationship. Other parts of the fandom are now picking it up out of pure affection.
** [[TheVerse The universe or continuity]] itself which also includes Series/TheFlash2014 has been nicknamed "the Arrowverse", in similar vein to the "[[Film/TheDarkKnightSaga Nolanverse]]".
*** Or if you prefer, the DCCWU.
* FollowTheLeader: The success of ''Arrow'' not only spawned a [[Series/TheFlash2014 spin-off]], but prompted [[Series/{{Gotham}} Fox]] & [[Series/{{Constantine}} NBC]] to launch their own shows based on DCComics characters, and Creator/{{Netflix}} to partner with Marvel on a series of shows about street level heroes in the MarvelCinematicUniverse. It can even be argued that ''Arrow'''s success is what led to NBC finally going ahead with the revival of ''Series/{{Heroes}}''. In fact, if the deal CBS made for a ''Supergirl'' series goes through, we'll have gone from no comic-book shows to one on every single broadcast network.
* HeyItsThatGuy: Let's start off with saying that somebody on ''Arrow'' must '''really''' have liked ''Series/{{Spartacus}}'', no less than three actors from that show have shown up. Manu Bennett, Cynthia Addai-Robinson, Katrina Law, and now Nick Tarabay all appeared on ''Spartacus'' before moving here (Liam [=McIntyre=] will also be appearing on ''Series/TheFlash2014''). Especially interesting is the fact that, unlike [[OnlySoManyCanadianActors other examples of actor-overlap,]] ''Spartacus'' was filmed half a world away in New Zealand.
** Poor [[Series/TheOC Kaitlin's]] family members have a nasty habit of dying.
** [[Series/{{Supernatural}} Benny]] the vampire is a 1%-er now.
** Speaking of Series/{{Supernatural}}, Gadreel is a mobster. And Ruby is a lawyer.
** Moira Queen was once [[Series/StarTrekVoyager the Borg Queen]]
** [[Series/NipTuck Adrian]] is no less crazy as a drug lord.
** [[Series/DoctorWho Captain Ja]][[Series/{{Torchwood}} ck Harkness]] is a mean shot with a bow and arrow.
** [[Series/BattlestarGalacticaReimagined Gaius Baltar]] is Dodger.
** [[Series/BattlestarGalacticaReimagined Helo]] is an enforcer.
** [[TeenWolf Jackson]] is no less Abercrombie in this show.
** [[Series/{{Angel}} Charles Gunn]] is a hitman now!
** [[Series/OnceUponATime Dr. Whale]] isn't too nice, either.
** [[Film/SupermanReturns Superman]] is Atom
** [[Film/StreetFighter Ryu]] trained Oliver.
** [[Series/StargateSG1 Dr. Frasier]] is the Queens' defense attorney.
** After leaving the Starling City DA's office, looks like Adam Donner was blackmailed by [[Series/OrphanBlack the Dyad group]] to watch over a clone.
** [[{{Glee}} Quinn's mom]] is Felicity's mom
** [[Franchise/TheChroniclesOfRiddick Boss Johns]] is Ra's Al-Ghul
** Captain Boomerang is [[Series/SpartacusBloodAndSand Ashur.]]
** [[Film/{{Titanic}} That guy who followed Jack Dawson to America]] is doing pretty well for himself, having risen to fire chief... after surviving the fire that created Firefly.
** [[{{Series/Heroes}} Adam Monroe]] is Cyrus Vanch. [[HilariousInHindsight Amusingly, he hasn't aged a day.]]
* HeyItsThatPlace: The house that is used for the Queen Mansion is [[http://en.wikipedia.org/wiki/Hatley_Park_National_Historic_Site Hatley Castle]] in Victoria, British Columbia. It was used for the Luthor Mansion on ''Series/{{Smallville}}'' and Xavier's school in the ''Film/{{X-Men}}'' movies.
* HeyItsThatVoice:
** Quentin Lance is [[WesternAnimation/JusticeLeagueDoom Metallo]].
** [[Creator/KellyHu China White]] is [[WesternAnimation/YoungJustice Cheshire]]. Time will tell if White will develop any interest in Green Arrow's potential protegés. She's also [[{{Film/X2}} Lady Deathstrike]] and [[VideoGame/BatmanArkhamOrigins Lady Shiva]].
** Dr. Lamb is [[WesternAnimation/FantasticFourWorldsGreatestHeroes Reed Richards]].
** [[Creator/KirbyMorrow Matt Istook]] is [[XMenEvolution Cyclops]].
** Thea Queen is [[Franchise/KingdomHearts Aqua]].
** Bronze Tiger is [[WesternAnimation/JusticeLeague Doomsday]].
** Creator/TaraStrong gets a brief cameo as the voice of [[spoiler: Harley Quinn.]]
** The Atom is [[WesternAnimation/TheBatman the Everywhere Man]]
** In the Japanese dub:
*** [[Creator/SatoshiHino Oliver Queen]] is [[LightNovel/TheFamiliarOfZero Saito Hiiraga]], [[LightNovel/ShakuganNoShana Yuji Sakai]] and [[Manga/{{Naruto}} Sai]].
*** [[Creator/SanaeKobayashi Dinah "Laurel" Lance]] is [[Manga/ElfenLied Lucy]] and [[Manga/DGrayMan Allen Walker]].
*** [[KentaroIto Tommy Merlyn]] is [[Manga/{{Naruto}} Choji Akimichi]] and [[Franchise/StreetFighter Yun]].
*** [[KentaMiyake John Diggle]] is [[Anime/MacrossFrontier Bobby Margot]] and [[VideoGame/StreetFighterIV Zangief]].
*** [[NaoyaUchida Quentin Lance]] is [[Manga/{{Naruto}} Madara Uchiha]] and [[Manga/DeathNote Soichiro Yagami]].[[note]]Overlaps a bit with CastingGag.[[/note]]
*** [[Creator/MamikoNoto Isabel Rochev]] is [[Anime/QueensBlade Tomoe]], [[Anime/HellGirl Ai Enma]] and [[VideoGame/SengokuBasara Oichi]]
*** [[Creator/MutsumiTamura Shado]] is [[KillMeBaby Sonya]].
*** [[Creator/JunFukuyama Barry Allen]] is [[Anime/CodeGeass Lelouch Lamperouge]] and [[SpiceAndWolf Kraft Lawrence]].
*** [[Creator/NorioWakamoto William Tockman]] is [[Manga/DragonBall Cell]] and [[Anime/CodeGeass Emperor Charles zi Britannia]].
*** Amanda Waller is [[Anime/GundamBuildFightersTry Sekai Kamiki]].
* IKnewIt:
** Sebastian Blood is [[spoiler:Brother Blood]].
** [[spoiler:Sara Lance]] survived [[NeverFoundTheBody the sinking of the Queen's Gambit]]. Her being Black Canary was also a popular crack-theory not even five episodes into season 1.
** A number of people suggested that due to her brown hair not being a trait inherited from two blonde parents, [[spoiler: Thea wasn't Robert and Moira Queen's daughter. It was revealed in "State v. Queen" that Thea was conceived after an affair between Moira and Malcolm Merlyn]].
** [[spoiler: Malcolm is BackFromTheDead. Okay, technically he never died in the first place, but the point stands.]]
** As soon as [[spoiler:Sara]] asked Oliver "What happened to [[spoiler:Slade]]?" without mentioning [[spoiler:Shado]], people correctly assumed she was killed.
** [[spoiler:Slade's return.]] Given the character's popularity, [[LikeYouWouldReallyDoIt most fans knew he wouldn't be killed like he was]]. Also, since the character is known for being a ''villain'', as soon as they mentioned [[spoiler:what Ivo was looking for and what Brother Blood was doing, many worked out he would be used on Slade and that he was the BigBad]] well ahead of the reveal.
* IWantYouToMeetAnOldFriendOfMine: It's been a RunningGag among ''Series/{{Spartacus}}'' fans on whose alumnae will appear next on the show.
* MeanCharacterNiceActor:
** Creator/JohnBarrowman as Malcolm Merlyn. Hold most of the [[AffablyEvil mean]], though. He has said it's fun to play a bad guy for a change.
** Oliver Queen, at least early on, was cold, distant, and a bit of a jerk. Stephen Amell, on the other hand, is incredibly friendly and interactive with fans.
* NoStuntDouble: ZigZagged - Stephen Amell does as much of his own stunts as he's allowed, including the infamous salmon ladder which Amell can pull off in real life, with some of the more complicated[=/=]dangerous stuff being done by a stunt double.
* OneOfUs: Head writers Guggenheim and Kreisberg are big comic fans and love continuity gags.
* TheOtherDarrin: [[spoiler:Caity Lotz as Sara Lance, replacing Jacqueline [=MacInnes=] Wood]] from the Pilot. There's even a FlashbackWithTheOtherDarrin.
* TheOtherMarty: Devon Aoki was set to play Tatsu Yamashiro in Season 3. However, she dropped out during filming and her scenes were re-shot with Rila Fukushima in the role.
* PlayingAgainstType:
** The [[IceQueen cold-hearted]] Isabel Rochev is well outside of Creator/SummerGlau's usual repertoire, even moreso [[spoiler:now that it's known she's a flat-out villain]].
** The [[MadBomber bomb-happy]], [[StrawNihilist nihilistic]] Shrapnel is a far cry from Sean Maher's previous roles.
* PlayingGertrude: John Barrowman, playing Malcolm Merlyn, and Colin Donnell, playing his son, are only 15 years apart in age. At times, they look more like brothers than father and son.
* ProductPlacement:
** For Windows 8 and Windows Phone, everywhere.
** All of the laptops are made by Asus.
* RealLifeWritesThePlot [=/=] TheCastShowoff: [[Creator/SummerGlau Summer Glau's]] character, Isabel Rochev, was not initially going to be a villain, rather a red herring. However, Summer was dissatisfied about being in a superhero series without getting in on the action, so Isabel Rochev became the Ravager.
* WhatCouldHaveBeen:
** Mr. Blank was originally supposed to be the DC Comics villain Onomatopoeia. However, as Onomatopoeia only speaks in, well, [[ExactlyWhatItSaysOnTheTin onomatopoeia]], they couldn't make it work without him coming across as mentally retarded (since sound effects sound far different in real life compared to comic books).
** The twentieth episode of Season Two was originally going to be a BackDoorPilot for a potential spin-off focusing on Franchise/TheFlash. Based on both the strength of Grant Gustin's portrayal of Barry Allen in "[[Recap/ArrowS2E8TheScientist The Scientist]]" and "[[Recap/ArrowS2E9ThreeGhosts Three Ghosts]]" and the fact that using the twentieth episode as a BackDoorPilot would interrupt the show's momentum as it built up to the season finale, the decision was made to make it a standalone pilot.
** In early drafts of Season Two, Sara was originally going to take the role of Ravager, but eventually ended up as the [[ComicBook/BlackCanary Canary]]. Instead, [[spoiler:the role of Ravager was given to Isabel Rochev]].
** The character who was going to buy out Queen Consolidated was originally going to be [[ComicBook/BlueBeetle Ted Kord]], a character whose existence was already implied through the appearance of Kord Industries. However, DC enacted an embargo on him due to "other plans", so the creators instead went with [[ComicBook/TheAtom Ray Palmer]].
** Before Matt Nable was cast, Creator/LiamNeeson said he'd play the show's version of Ra's Al-Ghul "in a heartbeat". WordOfGod states that after learning this, the network approached Neeson on the off chance he had the time, but they were unable to reconcile their schedules.
** There were plans to use HarleyQuinn past her initial unnamed cameo, but WB/DC put the kibosh on this after the ''Film/SuicideSquad'' movie was greenlit. Presumably this was due to the same reason shows like ''{{Smallville}}'' and ''JusticeLeagueUnlimited'' were [[ExiledFromContinuity barred from using certain characters who were being highlighted in movies at the time]].
* TheWikiRule: [[http://arrow.wikia.com/wiki/Arrow_Wiki Naturally]].
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