* 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.
* CastIncest: Heroes co-stars Hayden Panettiere (Claire Bennet) and Milo Ventimiglia (Peter Petrelli) dated while playing an onscreen uncle and niece.
* 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")
** [[MoeMoe 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 [[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]].
** [[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 [[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.
* 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."]]
* StarMakingRole: Creator/HaydenPanettiere wasn't exactly unknown before, but the show pretty much made her name and that of Creator/ZacharyQuinto. It also hasn't done Masi Oka any harm.
* {{Trope Namer|s}}: This series has named the following tropes:
** FutureMeScaresMe
** FromNobodyToNightmare
** GoodThingYouCanHeal
* WhatCouldHaveBeen:
** The obvious example is how volume 3 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.
** 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 [[AbusiveParents desperately]] [[TheScrappy needed]]). Unfortunately, Creator/StephenTobolowski 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).
* 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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