* ActorAllusion:
** Creator/ChristopherEccleston got to say "fantastic!", his CatchPhrase as [[Series/DoctorWho the Doctor]].
** One of Nathan's campaign ads in the pilot states that he served tours in Bosnia, Serbia, and Rwanda, and he mentioned his days in the Naval Academy in passing to Claire. Adrian Pasdar played a Navy pilot in ''Film/TopGun''.
** In the episode ''Run!'', Hope (insultingly) refers to Hiro as "Sulu." Hiro's father is played by George Takei, who played Sulu in ''Series/{{Star Trek|The Original Series}}''
** In the episode ''An Invisible Thread,'' Claire mentions that she thought Nathan was right-handed after he signs a paper with his left hand. Nathan is actually [[spoiler: Sylar in shapeshift mode]] and [[spoiler: Zachary Quinto]] is left-handed.
* ActorSharedBackground: Micah is a talented piano player, as is Noah Gray-Cabey, who has been playing since he was nine.
* BillingDisplacement: Averted. Not only are the main cast members always billed in strictly alphabetical order, ''Heroes'' (along with ''Series/{{Charmed}}'' and ''Series/{{Eastwick}}'') is one of the few non-soaps to credit just the actors who appear in each episode, instead of running a standard cast list.
* FandomNod: Sylar explains that he, in fact, does NOT eat brains.
** Also in one GN when meeting a trio of evolved humans who think of him as an inspiration, Sylar notes with some surprise "I have... fans!?" most likely a nod to the Sylar fandom.
* CastIncest: Heroes co-stars Hayden Panettiere (Claire Bennet) and Milo Ventimiglia (Peter Petrelli) dated while playing an onscreen uncle and niece.
* FakeBrit: Adam may be British, but David Anders is American.
* FakeNationality: James Kyson is Korean-American, and doesn't speak any Japanese. He had to rely on Masi Oka and a dialect coach to help him speak the language correctly.
** Samuel and Ricky are played by Americans Robert Knepper and Holt [=McCallany=]. Will and Caitlin are played by Brits Dominic Keating and Katie Carr.
** While Mohinder is from India, Sendhil Ramamurthy was born in Chicago and grew up in Texas. Lampshaded by Ando who says (of white people, though): "They all look alike."
* FranchiseKiller: Season 4/Volume 5 ended up being the final season of Heroes, despite leaving a CliffHanger. Opinion is divided over whether or not it was due to Volume 5 itself, or just karma from arguably inferior previous seasons catching up. Actually, not only was the show cancelled, but they also ended up abruptly ending the graphic novels, and original plans for an end-of-series movie was also scrapped as well.
* FanNickname: There are several, but highlights include:
** Mystery Sock for Isaac
** Fryingmon for Nathan (based on [[{{Engrish}} Hiro's pronunciation]] of "Mister I-saac" and "Flying Man")
** [[{{Moe}} Momo]], "Moe" (as in the Stooge), or Pretty-But-Stupid for Mohinder and/or Peter.
** Mohindrance and D'ohhinder, for the many, many times Mohinder steals the IdiotBall.
** [[TricksterMentor Rafiki]] for Usutu, the man Matt meets in the African plains.
** Pac-Man for Matt (based on Usutu's pronunciation of Parkman).
** HRG for Mr. Bennet (because of the glasses).
*** This was a canon nickname at least amongst the cast as Coleman referred to his character as such a couple times
** Senator Bambi for Nathan Petrelli. (It's the eyes.)
** President Worf or Worfbama for [[OurPresidentsAreDifferent the President]], because he's played by [[Series/StarTrekTheNextGeneration Michael Dorn]] and he's kinda sorta an {{Expy}} of [[UsefulNotes/BarackObama Obama]]
** Pasbeard for the infamous, butt-ugly BeardOfSorrow sported by Nathan Petrelli (Adrian Pasdar) in the beginning of Season 2.
** Nuke, for Luke the [[PureEnergy microwave boy]].
** Hiro ando Ando [[IncrediblyLamePun (bilingual pun)]]
** [[spoiler: Sythan for Nathan!Sylar.]]
* HeyItsThatGuy:
** Series/VeronicaMars has lightning powers.
** And Weevil can really scream.
** [[Film/{{Scream 4}} Kirby]] [[Creator/HaydenPanettiere Reed]] has healing powers, [[spoiler:proving that she's NotQuiteDead]].
** [[Series/GilmoreGirls Jess Mariano]] can mimic others' powers, who knew?
** [[Film/FinalDestination Clear Rivers]] can now evade death thanks to her endless supply of siblings.
** [[Series/BabylonFive Captain Sheridan]] appoints Nathan to the Senate.
** [[Series/{{Glee}} Quinn Fabray]] as [[TypeCasting a cheerleader]]
** How often to do you see a show with [[Series/{{Scrubs}} Franklin]] and [[MyWifeAndKids another Franklin]]
*** And a third [[Series/FranklinAndBash Franklin]], yet.
** The [[Series/DoctorWho Ninth Doctor]] can now turn invisible.
** [[Series/PrettyLittleLiars Alison DiLaurentis]] as Lydia's daughter who makes things blow up.
** [[Series/TheVampireDiaries Andie Star]] is the tattooed lady, and [[Franchise/{{StarWars}} Darth Maul]] is the knife-thrower.
** A particularly bizarre example occurred with Matt Lanter (Brody the rapist quarterback), who had previously been a regular on ''Series/CommanderInChief'', playing the President's teenage son. The weird part is that Hayden Panettiere had a guest role on ''Series/CommanderInChief'', and the two of them ended up making out. Hopefully, their prior... familiarity... made filming the rape scene a little easier.
** [[Series/TheNanny Grace Sheffield]] is Claire's roommate/girlfriend.
** [[Series/JaneTheVirgin Rafael]] can breathe underwater.
* HeyItsThatVoice:
** [[WesternAnimation/StarWarsTheCloneWars Anakin Skywalker]] as a quarterback who accidentally kills Claire.
** [[Franchise/KingdomHearts Kairi]] can now never get hurt.
* IKnewIt: Rebel's identity... if you weren't betting on it being [[spoiler:Hana (though she [[AllThereInTheManual died in the comics]])]].
* {{Jossed}}: [[spoiler:"Are you going to eat it?" "Claire, that's disgusting."]]
* McLeaned: We'll never learn the real reason, but it would certainly explain the rather quick way Adam was killed off and possibly the real reason for killing off [[spoiler:Nathan]].
* NamesTheSame: Claire shares the name of a character in ''VideoGame/TalesOfRebirth,'' of all things.
* RealLifeRelative: The actors that play Ted Sprague and Sandra Bennet are married in real life.
* RealLifeWritesThePlot: Or... doesn't. Due to the writers' strike.
** Sylar gaining [[spoiler: shapeshifting]] powers was a pretty obvious attempt to keep the character around despite ZacharyQuinto being absent for long periods of time due to being the new [[Film/StarTrek Spock]].
** Tracy disappearing halfway through season 4 was due to Ali Larter filming ''Film/ResidentEvilAfterlife''.
* ScullyBox: Hayden Panettiere and Kristen Bell are very petite women, only coming up to 5'1" at best. They either needed the Scully boxes or wore heels in order to fit into scenes against Zachary Quinto (6'3) and Jack Coleman (6'2").
* StarMakingRole: Hayden Panettiere wasn't exactly unknown before, but the show pretty much made her and Zachary Quinto household names. It also hasn't done Masi Oka or Milo Ventimiglia any harm.
* {{Trope Namer|s}}: This series has named the following tropes:
** FutureMeScaresMe
** FromNobodyToNightmare
** GoodThingYouCanHeal
* WhatCouldHaveBeen:
** The obvious example is how volume 2 was cut short, with plot threads obvious to be related to the main story ending up going nowhere. A bigger example would be the entire style of the series: The original intent was to have a revolving cast, with most characters not returning in future seasons. What could have been, indeed, if after season 2 we didn't have to deal with most of the [[TangledFamilyTree extended Petrelli family?]]
** The {{Aborted Arc}}s caused by the writer's strike, which led to the SeasonalRot which the series never fully recovered from. According to Sendhil Ramamurthy, the strike had [[http://www.ew.com/article/2015/06/08/heroes-reborn NBC force the show]] to expand season 3 to 25 episodes, which apparently tested everyone's limits during filming.
** The Season 2 DVD had an AlternateEnding in which Peter failed to catch the virus vial that Adam had dropped. It was planned that the virus would have been unleashed, and the latter half of the season would have been dedicated to finding a cure with Maya performing a HeroicSacrifice by using her plague power to absorb the virus, killing her in the process.
** The writers were originally going to have a KillEmAll ending at the end of season 1 and have a rotating cast each season. They didn't anticipate the characters becoming popular and developing a fanbase or ExecutiveMeddling and it became increasingly difficult to properly use the SuperPowerLottery winners like Peter and Hiro again.
** The writers were also originally going to have a gay character in the original script for season 1 [[ExecutiveMeddling but the executives said no]] so in retaliation the writers filled the script to the brim with {{Subtext}} [[{{HoYay/Heroes}} for all of them...]]
** Elle was supposed to show up in the "I Am Become Death" future as the mother of the little boy, but conflicts with Kristen Bell's filming schedule forced the writers to cut the Sylar[=/=]Elle arc short and kill her off.
*** She also was apparently going to be Claire's sister, but this was dropped (not necessarily a Petrelli though - the blonde hair indicates that they shared the same mother, Meredith, so they might have been half-siblings and Bob still her biological father).
** Even after Season 2 was cut short and its original plot (the Shanti Virus) halted, Bob Bishop was going to play a larger role in Season 3, probably getting to use his power more and get some development (which, let's be honest, he desperately needed). Unfortunately, Creator/StephenTobolowsky had a terrible riding accident in the months leading up to production, one which nearly paralysed him and put his neck on the mend for ''months''... so they DroppedABridgeOnHim with Sylar killing him offscreen for his ability, and he did little in his few scenes until this happened. To add insult to injury, Sylar never even used said power, and Bob's daughter Elle was killed off anticlimactically (as noted above).
** Peter and Nathan were actually written to be ''twins'', but since they had trouble casting the roles, they just aged up Nathan instead. Peter was also originally named Ethan when Milo Ventimiglia read for the role.
** Sylar was not originally intended to be a watchmaker, but a middle-aged priest. The character was altered accordingly after Jeph Loeb expressed concern that the part was too limiting storywise after a test screening of the original pilot. The character was altered again after Zachary Quinto had read for the part, which explains why the character was faceless until "Homecoming".
** An alternate version of the pilot showed that Ted Sprague's power originally belonged to another character named Amid Halebi. The character was going to be involved with a terrorist plot and had a history with Matt Parkman, but Tim Kring felt the storyline was far too controversial and cut it out of the final pilot. Halebi's ability was then reworked into Ted's story.
*** In the same original pilot, it was shown that Isaac had gotten to the drugs in order to paint, despite having handcuffed himself, because he used a say to ''cut off his hand'' - further explaining why he was in such terrible condition when Simone and Peter found him. The footage was cut and spliced to remove this element. Kring admitted on the DVD Commentary that the reason for this was that original outline had Season 1 lasting months if not a whole year (as opposed to imitating ''Series/{{Lost}}''), during which Isaac was to relearn how to use his hand after it was reattached, in addition to learning to see the future without his drugs; this became impractical when the narrative was condensed into (roughly) six weeks and so was cut from the final product.
** Zack in the earliest plans was a geeky girl named Zoe who was to be(come) HeterosexualLifePartners with Claire, before being [[GenderFlip rewritten]] as her AmbiguouslyGay male friend. He was also meant to come out to her in [[WhamEpisode "Homecoming"]] but Thomas Dekker's agent vetoed this due to a belief he'd be typecast in gay roles; she was also the one who pulled him out of the show partway through the back half (he would star as [[Series/TerminatorTheSarahConnorChronicles John Connor]] later that year), leading to Zack's sudden ChuckCunninghamSyndrome.
* Tim Sale is the artist behind most of the art featured on the show, except for Sylar's art, which was done by Alex Maleev, Peter's first stick figure doodle (done by Jeph Loeb), and Molly's doodles, which the actress did herself. Sale and Jeph Loeb are frequent comics collaborators, which strengthened the show's ties to comics.
* The vignettes that aired promoting new characters that would debut in the following season is a technique that originated in ProfessionalWrestling, specifically in Memphis, TN with Wrestling/TheFabulousOnes in the early 1980s and is still used today.
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