[[quoteright:350:[[Film/TheEmpireStrikesBack http://static.tvtropes.org/pmwiki/pub/images/Luke_I_Am_Your_Father.jpg]]]]
[[caption-width-right:350:[-If this image spoiled anything, [[ItWasHisSled where have you been for the last few decades]]?-] ]]

->'''Darth Vader:''' Obi-Wan never told you what happened to your father.\\
'''Luke Skywalker:''' He told me enough! He told me you killed him!\\
'''Darth Vader:''' No. ''I'' am your father.
-->-- ''Franchise/StarWars'' Episode V: ''Film/TheEmpireStrikesBack'' (full quote [[Quotes/LukeIAmYourFather here]])

A specific variety of TheReveal.

A parent-child relationship between two characters who were previously thought unrelated is revealed, usually with generous dollops of melodrama--blood is, after all, ThickerThanWater. Beloved of soap operas, made famous by the ''Franchise/StarWars'' films (from which the trope takes its name, though as you can see, [[BeamMeUpScotty it isn't an exact quote]]).

Whether or not this is a good thing or a bad thing for whoever is being given the reveal mainly depends on who is giving the reveal in question. Sometimes an ally, a {{Mentor|s}} or a non-romantic MysteriousProtector will turn out to be the parent of the person being given the reveal, but other times, the reveal of who a character's parent is will be cause for serious anguish, such as someone who just [[HeroicSacrifice gave his or her life for him]], someone who could have been a LoveInterest, or worst of all, a villain working for the BigBad or even the BigBad himself, as in the most infamous ''Franchise/StarWars'' example.

In cases when villain and hero turn out to be parent and child, count on at least one scene where the hero worries that he or she will eventually [[InTheBlood end up like the parent]].

Sometimes it's a bogus revelation, and at the end of the episode or plotline the ResetButton is pressed to restore the previous relationship -- or lack of one.

Though the trope itself is too [[UndeadHorseTrope fundamental]] to become {{Discredited|Trope}}, any permutation of the actual line ("No, X. ''I'' am your father.") nowadays will be met with a groan and a "Not again!" from the audience. Also a [[StockEpilepticTrees popular insane fan theory]].

Compare with MysteriousParent, or FamilyRelationshipSwitcheroo where the characters were thought to be related, but are not parent and child. Frequently, it's a [[LineageComesFromTheFather father-son]] relationship revealed this way.

This trope was already being mocked back in 1790 by Creator/JaneAusten in ''Literature/LoveAndFreindship'' (with four grandfather-grandchildren relationships revealed ''in under a page'').

The flip-side is LukeYouAreMyFather. Compare LongLostRelative, LukeIMightBeYourFather, EveryoneIsRelated. Contrast with IAmNotYourFather. Subtrope of ConnectedAllAlong. Frequently occurs alongside ArchnemesisDad.

Here is a [[https://www.youtube.com/watch?v=AeGG0-2AhFQ compilation]] with a lot of examples.

!''As a plot twist trope, spoilers marked and unmarked are abundant in this page. YouHaveBeenWarned.''


[[folder:Anime & Manga]]
* In the final arc of ''Manga/{{Bleach}}'', the BigBad Yhwach reveals that Ichigo is his descendent through his mother Masaki, calling him "my son born in the dark". The full explanation is not revealed for several chapters: Masaki was a Quincy, and Yhwach is the progenitor of all Quincies and source of their powers -- hence he's also the ancestor of Ichigo's AloofAlly and second cousin Uryu.
* In ''Anime/AquarionEvol'': NiceGuy and TheHero, Amata Sora, barely even knew his mother, believing her to have abandoned him at a young age due to his levitation powers. Then it turns out that she never abandoned him and is with the {{Al|ienInvasion}}tairians, but also that his father is in fact the LEADER OF THE ALTAIRIANS!!!
* In Manga/JoJosBizarreAdventure Part 2, it is revealed that Ripple master Lisa Lisa is actually Joseph Joestar's mother.
* In ''Manga/TwentiethCenturyBoys'' Friend tells Kenji that he is Kanna's father. Kanna learns this after the first major timeskip.
* The third episode of ''Manga/DeathNote'': Light's father is the one leading the police effort to catch the mysterious murderer -- actually Light.
* PlayedForComedy in the crossdressing manga ''[[http://mangafox.me/manga/maid_in_japan/ Maid in Japan]].'' The main character's master has hated maids since her father left her for one, and puts up with her current one begrudgingly. But [[http://mangafox.me/manga/maid_in_japan/v01/c005/20.html things are not exactly]] [[http://mangafox.me/manga/maid_in_japan/v01/c005/21.html as they seem]].
* In the Mazinger trilogy it was played straight, subverted and inverted:
** ''Anime/MazingerZ'': "Kouji, Shiro, I am your mother." Subverted because in reality she was a cyborg, pretending being their real--and very deceased--mother.
** ''Anime/GreatMazinger'': Shiro learnt that Dr. Kenzo Kabuto is, in fact, his not-quite-dead father. Kouji learnt it later due to him not being in Japan during that time.
** ''Anime/UFORoboGrendizer'': It was inverted and played straight. Maria told Duke she was daughter of the King and Queen of Fleed, not knowing he was their son, and therefore, her brother. The moment they played this trope straight with each other and hugged at each other was definitely a CrowningMomentOfHeartwarming.
** Reboot ''Anime/ShinMazinger'' reveals local innkeeper Nishiori Tsubasa to be Shiro and Kouji's mother. Her hairstyle and SlasherSmile are especially similar to Kouji's, as emphasized in a few shots in the episode where the reveal happens.
* ''Anime/NadiaTheSecretOfBlueWater'': Nadia learns that Captain Nemo is actually her long-lost father when he goes down with the damaged Nautilus at the beginning of the "castaway" arc of the series.
* It's revealed relatively early on in ''Manga/OnePiece'' that Luffy's grandfather is Vice-Admiral Garp, a legendary Marine, and his father is Dragon, the mysterious revolutionary who saved Luffy at Loguetown. The first part is subverted in that, while it was news to the readers (and the rest of the Straw Hats), Luffy himself was already well aware of who his granddad was.
** Chapter 550 [[TheReveal reveals]] that Ace's father is Gold Roger. He was aware of this before it was publicly announced to the world, although the audience wasn't, and he's pretty emphatic that he considers Whitebeard his true father.
** [[spoiler: While it's no surprise to Sanji, audience say hello to [[http://i3.mangapanda.com/one-piece/832/one-piece-7848607.jpg Judge Vinsmoke]], who's basically Darth Vader without the whole "actually loving his son part"]].
* In ''Manga/KazeToKiNoUta'', Auguste reveals to Gilbert that he is his father (not his uncle) to bring him back under his control. It doesn't go as well as he expected...
* Misaki's relationship to Shuuko/Shuu/the Champion in ''Anime/KidouTenshiAngelicLayer''. The anime lets the viewer in on Shuuko's secret [[LockedOutOfTheLoop long before Misaki knows]], but in the manga, we only learn when she does.
* A rather unlikely example in ''Manga/MahouSenseiNegima'', where one of 10-year-old Negi Springfield's 15-year-old students claims to be his ''descendant''. She's from a hundred years in the future--and can prove it--so it's not as crazy as it sounds...
** The Lifemaker is Negi's and Asuna's ancestor. He also calls Evangeline "my daughter", although they might not be biologically related (He is her sire in the vampiric sense, not the paternal sense). Also in Negi's case, as The Lifemaker has possessed Nagi's body.
** Sequel series ''Manga/UQHolder'' has Negi's "[[ArtificialHuman grandson]]" Touta meet an astral projection of Asuna during a battle with the Lifemaker. She notes that as Touta's creation included some of her genetic material as well, she tells him "I guess that would make me your grandmother".
* Used in the ''Anime/MonsterRancher'' anime (''Monster Farm'' in Japan), in which Holly learns that the main bad guy is her father (with the villain using the Darth Vader's dialogue from ''The Empire Strikes Back''). It takes the trope further by having Holly screaming [[BigNo "NOOOOO!"]] afterwards [[labelnote:*]][[http://www.youtube.com/watch?v=RFKqY6V2ctY Go pretty well together too]][[/labelnote]].
* In Chapter 367 of ''Manga/{{Naruto}}'', the [[CaptainObviousReveal most prevalent fan theory of the fandom is confirmed]]: Naruto is indeed the son of the Fourth Hokage. This is the third of three major [[TheReveal clarified mysteries]] that were revealed within a span of less than five chapters. A while earlier this was a lesser one: Asuma Sarutobi is the Third Hokage's son but they had the same name and similar looks, so it was kinda obvious, just not said before then.
** Aaaaand another for Naruto: his mother Kushina was the previous host for the Kyuubi.
* ''Anime/NeonGenesisEvangelion'' does this three times. Eva 1 contains the soul of Shinji's mother. Eva 02 contains the soul (well half) of Asuka's mother. Rei is occasionally compared to Shinji's mother (it is implied that she might be a clone of her).
** And Lilith is the mother of all humanity.
** All in all, in Eva, "YourMom" jokes are done at your own peril.
** ''Neon Genesis Evangelion: The Abriged Series'' plays with this in an interesting way:
--->'''01:''' Shinji, Gendo never told you what happened to your mother.\\
'''Shinji:''' He told me enough... He told me you killed her.\\
'''01:''' No Shinji. I AM YOUR MOTHER.\\
'''Shinji:''' Ehhh saw it coming.
** Kaworu pulls this off in ''Rebuild 2.0''
--->''(Gendo and Fuyutsuki spot Kaworu sitting shirtless in hard vacuum)''\\
'''Fuyutsuki:''' A human? Impossible...\\
'''Kaworu:''' Pleased to meet you, father.
* ''Manga/SoulEater'' gives us a real good one, with Asura's "such a stupid little brother" line to Death the Kid, who just happens to be his little brother. Kid does not take this very well, as can be imagined.
* Anime/MobileSuitGundamAge gives us a unique variant. BigBad Ezelcant is convinced that Kio Asuno is the ''reincarnation'' of his ''dead'' son.
* ''Anime/TenchiMuyo!'' is full of these. Piece by piece we learn that Katsuhito is Ayeka's and Sasami's half-brother, which means they're both Tenchi's great aunts; then that Washu is Ryoko's mother; and eventually that the woman we thought was Tenchi's mother is actually his sister and that Washu is also Mihoshi's great great grandmother. Then in the second movie, ''Daughter of Darkness'', Mayuka turns up on the doorstep claiming that Tenchi is her father, which is awkward because they're both in their teens; but Washu does a DNA analysis, and yep, she's right. There's the moment in the first movie when Tenchi tells Achika and Nobuyuki that they're his parents, even though they're all about the same age, but that doesn't really count.
* It's nice to see a good old-fashioned subversion, and ''Manga/RaveMaster'' brings us one: there are two characters named Gale, one the antagonist (and head of the evil organization), one a good guy (who we've never seen before). Angst-tastic as it would be, the hero assumes his father is the former. Nope. It's the latter. They also play it straight with the two Musicas.
* A variation exists in ''Anime/MagicalGirlLyricalNanohaStrikers''. After a successful raid on an illegal research facility, Quint adopts a pair of experimental [[SuperSoldier Combat Cyborgs]] because they looked so much like her and raises them as her own daughters. It's later revealed during a medical examination that the reason why Subaru and Ginga looked like her was because their genetic structures were identical. Somehow, Quint's genetic data had been acquired by the researchers and was used to create the two children. It's also later revealed that Nove is Quint's genetic daughter, too, explaining her strong similarity to Subaru.
** Jail Scaglietti claims to be Fate Testarossa's father, though in a purely metaphorical sense since she was the end result of his research into cloning.
* In the manga version of ''Manga/RurouniKenshin'', Enishi, who wants revenge on Kenshin, is his brother in law (obviously Kenshin knew when he first met him). The old guy who befriends Kenshin is Kenshin's father in law who accepted that Kenshin killed his daughter accidentally. Naturally, Enishi ends up with the old guy and both remark that they remember seeing each other.
* Subverted in ''Manga/SaintSeiya''. Along the series, there had been a lot of hints that Marin was Seiya's long-lost sister Seika. She wasn't, his sister was actually a WaifProphet, and Marin's brother Touma even appears as an enemy in the Tenkai-hen movie.
** And played quite straight in the manga where, it was revealed that Mitsumasa Kido was actually the birth father of all the orphans he sent around the world to be trained as Saints.
* ''Anime/DigimonFrontier'', with Koji learning he has a twin brother he was SeparatedAtBirth from: Koichi, the {{Face Heel Turn}}ed SixthRanger with the [[EvilTwin Spirits of Darkness]]. Anime/DigimonSavers also has Keenan Crier finding out he is one of the "hum'''o'''ns" he despises so much, but it's painfully obvious that he was human from the start.
** Also from ''Savers'': Initially, it looks like Masaru's DisappearedDad is Yggdrasil, the "world tree," central computer and god of the Digital World. But [[MysteriousProtector BanchouLeomon]] reveals that ''he'' is Masaru's father. Yggdrasil was about to kill Suguru, but [=BanchouLeomon=] absorbed his soul. Unfortunately, Yggdrasil (being a ''god'' and all...) realized it, and has been using Suguru's body for its own ends.
* On ''Anime/YuGiOhZEXAL'', a ShowWithinAShow version occurs on ''The Sparrow'', where the hero's mother is the villain Galaxy Queen. (Which is In-universe MetaCasting, as the actress who plays Galaxy Queen is the lead actor's actual mother.)
* Parodied in a later episode of ''Anime/MagicalProjectS''. Romio claims that she's the older sister of Sasami, citing the fact that they share blue hair and the lack of resemblance between Sasami and her parents as the logical reasoning. Just as Sammy was going to run up for a "family reunion", Misa stops her and makes her realize it was a lie, which Romio confirms.
** Romio's character design is base on Ayeka who actually is Sasami's sister in the Tenchi Continuity.
* ''Anime/SonicX''. It is strongly suggested (said outright in the dub) that Dark Oak is Cosmo's father. However, while the characters ''do'' learn that the two are of the same species, Cosmo never directly learns of her heritage.
* In ''Anime/PrincessTutu'', Rue's father is revealed to be [[BigBad the Raven]] in the second season. That's not so surprising considering she's the DarkMagicalGirl...but it's later revealed that he actually kidnapped her as a child, and she's just a normal human girl after all. It's also later revealed that Drosselmeyer is Fakir's great-great-grandfather, and Fakir inherited his [[RealityWarper powers]].
* The very last volume of the ''Manga/ChronoCrusade'' manga reveals that Chrono and Aion are twins, and their mother was a human woman turned into [[HiveQueen Pandaemonium]] when she was pregnant with them. Also, Satella discovers that her long-lost sister is Fiore.
* In ''Anime/{{Gravion}} Zwei'', it's eventually revealed that Sandman is Leele's father, as well as the brother of the Zeravire's creator/leader, and that Raven is Eiji's missing sister Ayaka.
* In ''Anime/RahXephon''... er, this is going to take a while: Ayato's real mother isn't Maya, but Itsuki's adopted sister Quon. Quon is also Maya's twin sister and Itsuki's ''mother'', making Itsuki Ayato's brother. Shirow Watari is their father. Haruka Shitow's uncle, Shougo Rikudoh, was the adoptive father of Maya and Quon. And Haruka? Before her mother remarried, her family name was '''Mishima''' - making her the same long lost "object of desire"/childhood sweetheart that [[SpellMyNameWithAnS Ixtli/Ishtori]] took her appearance from. Or, for those that don't like to read: [[EveryoneIsRelated everyone is related to everyone ever.]]
* [[TheDragon Altair]] and [[TeamMom Vega]] in ''Anime/GearFighterDendoh'' are brother and sister, ''both'' of whom had presumed each other dead for years ([[MaskPower wearing those damn masks all the time]] probably only added to the confusion). Then there's Vega's true identity as Hokuto's mom.
* ''Anime/GlassFleet'' had a pair of sibling enemies learn at ''the same time'' that they were related. Vetti and Cleo were none-too-pleased to say the least.
* Silver and Giovanni from ''Manga/PokemonSpecial''. It is hinted that Silver's game counterpart is also related to Giovanni.
** Confirmed in a sidequest event, from ''[[VideoGame/PokemonGoldAndSilver HeartGold and SoulSilver]]''. Silver knows who his dad is though, since he's arguing with him.
* ''Anime/ScienceNinjaTeamGatchaman'' has Ken and the leader of Red Impulse. Just seconds before the latter's HeroicSacrifice, in fact.
* PlayedForDrama in ''Anime/MobileSuitGundamUnicorn'', where Cardeas Vist, wounded and on the verge of dying, reveals to protagonist Banagher Links that he was his real father, and [[IAmDyingPleaseTakeMyMacGuffin entrusting him with the Unicorn Gundam.]]
* ''Manga/DaiNoDaibouken'' has the reveal that Baran, one of the six evil generals, is actually Dai's father. And because that's what evil dads do, he wants Dai to help him [[KillAllHumans rid the world of humanity]].
* ''Legend of Lemnear'' Manga has some examples well 2: Buan turns out to be lian's father and near the finale Lord Varol turns out to be the real father of Lemnear, who turns out to have wanted Lemnear to defeat him for the greater good after the evil has corrupted him; also near the finale Ragna turns out to be Varol's twin brother, which makes him Lemnear's uncle
* Rihoko from the ''Anime/{{Witchblade}}'' anime, with both parents.
* Halfway throughout ''Manga/ShamanKing'', Mikihisa, Yoh's father, reveals to Yoh himself and his friends that Hao, the BigBad, is actually Yoh's twin brother, much to their [[OhCrap huge surprise]].
* Done twice in ''Anime/SupercarGattiger'': [[BigBad Emperor Black Demon]] is the grandfather of [[TheHero Joe Kabuki]], while [[TheDragon Queen Demon]] is Joe's mother.
* In ''Manga/FullmetalAlchemist'', it is revealed that [[BigBad Father]] is a clone of Ed and Al's dad, and the homunculi are Ed And Al's siblings, as they are Father's "children."
** A similar thing happened in the [[Anime/FullmetalAlchemist 2003 anime version]]. Envy is revealed near the end to be the Elric siblings' half-brother, being that he was the son of their father and [[BigBad Dante]].
* ''Anime/TigerAndBunny'' reveals that Yuri Petrov/Lunatic is Mr. Legend's son. This in of itself isn't too startling a revelation until it's combined with a previous revelation of Yuri's history: Yuri's first kill was his own [[AbusiveParents abusive father]].
* Used at the beginning of ''DragonBallZ'' where invading space alien Raditz [[ItWasHisSled turns out to be Goku's brother]].
* ''Manga/MermaidMelodyPichiPichiPitch'' reveals that Kaito and Gaito/Gakuto are twin brothers.
* ''Anime/GaikingLegendOfDaikuMaryu'' DoubleSubverted this trope. Captain Garis continuously exhibits the exact same mannerisms as Daiya's father. His voice sounds similar, he acts as AFatherToHisMen, and even the opening focuses on him during the line "you can hear your father's voice''. Then it turns out that he's not even the same ''species'' as Daiya's father - he's just really damn caring. THEN it's revealed much later on that he's RURU's father, a memory that she'd suppressed up until that point.
* In ''Anime/KillLaKill'', Ragyo Kiryuin reveals she is Ryuko Matoi's true mother, which also means her daughter Satsuki is Ryuko's older sister. And in the next episode, it's revealed that Ryuko's father, Isshin Matoi, is actually Satsuki's father, Soichiro Kiryuin, after he faked his death to escape Ragyo and save Ryuko from death by abandonment.
* In ''Anime/HeartcatchPrettyCure'', Yuri and Tsubomi both find out that Professor Sabaaku, the creator of the Dark Precure, is actually Yuri's long-lost and [[BrainwashedAndCrazy brainwashed]] father, Professor Tsukikage. What makes this a bit more heartbreaking is that Tsubomi's grandmother, Kaoruko, figured this out and tried to have Tsubomi keep Yuri away from him. Didn't work out too well.
** And then he reveals that he created Dark Precure from Yuri's DNA, making them biological sisters. The worst part about it: Professor Tsukikage tells Yuri about this ''after'' Yuri defeated Dark Precure who's dying at this moment.
* In ''Anime/SuitePrettyCure'', the Masked Cure Muse reveals her identity infront of her BrainwashedAndCrazy father [[BigBadWannabe Mephisto]]: she's Ako. The next episode also reveals that Ako is Aphrodite's daughter and Otokishi is Aphrodite's father. Hibiki and Kanade are surprised by these reveals and Ellen and Hummy didn't recognize Ako as their princess.
* In ''Anime/SmilePrettyCure'', Candy turns out to be Royale Queen's daughter and successor. This surprises everyone, even Candy's brother Pop.
* In ''Anime/DokiDokiPrettyCure'', it turns out that Aguri, Regina and Ai-chan originated from Princess Mari-Ange's life, meaning that they are not only sisters in a weird sense, but also that Aguri and Ai-chan are daughters of [[BrainwashedAndCrazy King Jikochuu]].
* Double subverted in ''Manga/FairyTail'' when Gray meets his supposedly dead father Silver. Naturally, Gray does not believe it's actually him at first since he saw him die at the hands of his ArchEnemy Deliora, but then Silver says he's actually Deliora possessing Silver's corpse, which [[UnstoppableRage really sets him off]]. Once Gray defeats him, he clues in that Silver really ''is'' his father brought BackFromTheDead, and was only pretending to be Deliora so Gray would [[DeathSeeker put him out of his misery]].
** Later on, it's revealed that [[TheHero Natsu]] is [[BigBad Zeref]]'s younger brother, reincarnated as Zeref's strongest demon, Etherious Natsu Dragneel (E.N.D.). Natsu doesn't remember any of this since he was only a baby when Igneel separated him from Zeref, while the rest of the world believed Zeref to have OnlyOneName (his full name being Zeref Dragneel).
** Also it's revealed in the recent chapter 513, that Eileen Berselion [[spoiler:the former Queen of Dragons]] is actually Erza Scarlet's mother.
* In ''Anime/InazumaEleven Go'', it's eventually revealed that "Helper X" is actually Asurei Rune, Fei's father. If that wasn't enough though, it's then revealed not long after that the bubbly middle school girl Nanobana Kinako is actually Fei's mother. Considering the respective ages of Fei and Kinako, this obviously confuses everyone until it's revealed that the Kinako we know was from the time when she was the same age as Fei, and was taken from her respective time period to help out with Asurei's plans (due to time traveling stuff).
* In an audio commentary for [[Anime/{{Pokemon3}} the third Pokémon movie]], it's revealed that in the earliest draft of the anime, Giovanni would've been Ash's father.
* In ''Anime/FlipFlappers'' it's revealed that Papika's previous partner, Mimi, whom also appears in dream visions at the start of the series, is really Cocona's mother.

[[folder:Comic Books]]
* In ''Batman/Huntress: Cry for Blood'', ComicBook/{{Huntress}} gets an old photo of her deceased mother, Maria Bertinelli, ''in flagrante delicto'' with mob boss (and rival to mob boss Franco Bertinelli, Maria's husband) Santo Cassamento, and demands to know what they were doing in that hotel room together. His answer: "Isn't it obvious? We were conceiving you, Helena Rosa." Even worse: when he was instructed to kill the rival mobs, the Bertinelli, he saw a chance to MurderTheHypotenuse, and instructed his henchman to kill all the family "except the sister" (meaning, María Panessa, sister of the mob leader Tomasso Panessa). But the henchman, who was not used to the usual mob words, saw a regular family (a man, a woman, a male child and a female child) [[ExactWords and spared the female child, the "sister"]] (yes, Helena). You can be sure that, after hearing this, no threats or manipulations could possibly keep Cassamento alive for very long. [[AndThisIsFor The blood cries for blood]].
* The plot of ''ComicBook/BatmanRIP'' essentially involves multiple {{Mind Rape}}s piled on top of each other to see how many it takes to make Batman crack. The biggie? Enigmatic villain Simon Hurt claims that he is actually Thomas Wayne, and that he faked his own death after hiring Joe Chill to kill his faithless whore of a wife. The truth of his story hasn't been determined, but Bruce decides to reject it at the end of the arc.
* In ''[[ComicBook/BoosterGold Booster Gold One Million]]'' it is revealed to the audience -- but not to any of the other characters -- that Booster's mentor Rip Hunter is actually Booster's son.
* In nine issues, ''ComicBook/BrightestDay'' has already had three separate revelations about familial bonds between heroes and villains.
* In ''GreenLantern Corps #35'', Sinestro tells Soranik Natu that she is his daughter. He left her in the care of her foster family to keep her away from the dangers of being associated with him; making this one of the only semi-decent things he's ever done in his life. Since it's ''[[BigBad Sinestro]]'', he could be lying.
** The last page of ''Green Lantern'' #36 makes it pretty clear that he's telling the truth.
* A ''Comicbook/{{Legion of Super-Heroes}}'' mini-series in the '80s started with the premise that R. J. Brande, the team's billionaire sponsor, was dying, and in order to save him, the Legionnaires had to figure out which one of them was secretly his child -- an idea that had never been even hinted at before. It finally turned out to be Durlan shapeshifter Chameleon Boy; Brande was revealed to also be a Durlan who'd contracted a disease that [[ShapeshifterModeLock froze him into human form]].
* Rose Walker's grandfather in ''ComicBook/TheSandman'' is Desire, who impregnated the comatose Unity Kinkaid during Dream's imprisonment.
* Comicbook/{{Supergirl}}:
** Subverted with super-villain Lesla-Lar. After being disintegrated, her consciousness lived on. This messed with her mind to the point where she thought Supergirl was her sister. When she made this claim, Kara replied she had no siblings.
** [[LampshadeHanging Lampshaded]] in Creator/PeterDavid's ''Supergirl'' #57:
--->'''Buzz:''' Dominique... I am your father... Oh, I'm certain ''that'' didn't sound too "Darth Vader".
** In ''Supergirl vol 6 #24'', super-villain Cyborg Superman gets his memories back... and remembers what he is Supergirl's father. Several months later, in ''Supergirl vol 7 #2'' he tells Kara he is her father (who she had previously thought dead).
* Chris, Franchise/{{Superman}}'s adopted son, was found in a rocket similar to his. It was revealed during an invasion that the rocket was sent from the Phantom Zone, and he was the son of Zod and Ursa.
* Lilith from the Comicbook/TeenTitans knew nothing about her past. Nothing at all. Until [[ComicBook/TheOriginOfLilith her mother kidnapped her]], to rule Olympus together. Her identity? Oh, nothing important: it was Thia, a Titan of Myth and goddess of the sun. Which implies that Lilith is a demigoddess.
* Pre-Flashpoint, ComicBook/WonderWoman discovered that one of the [[EldritchAbomination Hechatonkaires]] was her "father": the clay that was used to create her came from his imprisoned body.
** Post-Flashpoint she learns that the whole clay story is a lie, and she's the daughter of Hippolyta and Zeus.

* Eighteen years after their creation, it was revealed that [[Comicbook/TheAvengers Avengers]] ComicBook/ScarletWitch and ComicBook/{{Quicksilver}} were actually the children of their former leader, long-time Comicbook/XMen antagonist ComicBook/{{Magneto}}. Their feelings over this revelation were mixed, to put it mildly. Still, as Magneto is a DramaQueen, he did not told this ''directly''. He told that Luna was his granddaughter, and let them react to that.
** Polaris, of the X-Men, was revealed early on to be Magneto's daughter, too. But then that was revealed to actually be a plot by the villain Mesmero, who was using a Magneto robot to make that claim. Then later it was again revealed that she ''is'' his daughter... then once again not. Currently, she is once again revealed to be Magneto's daughter... ugh.
* Hiro-Kala knew that he was the son of ''Comicbook/IncredibleHulk''. He didn't know that Bruce Banner was the Hulk. So when they first met, the following exchange happened:
-->'''Hiro-Kala:''' Who are you?\\
'''Banner:''' Your... your father.\\
'''Hiro-Kala:''' Hmp. I don't think so.\\
'''Banner:''' Yeah, [[YouWouldntLikeMeWhenImAngry I'm not too happy about it either.]]
* During John Ostrander's run of ''ComicBook/ThePunisher'', Jigsaw has kidnapped the member's of a mafia family that Frank has fallen in with. While talking with the oldest sister, he tells them why he's doing this; he and Frank are cousins. When they were kids, Frank was always showing him up, and everyone loved him. When she asks him if it's true, he says nah. He was just lying to pass the time.
* A pivotal turning point in the original ''ComicBook/SpiderMan2099'' run featured Miguel O'Hara (Spider-Man) discovering that the main antagonist of the series and head of the megacorp Alchemax, Tyler Stone, was in fact his father. This derailed the current plotline for quite a few issues as Miguel wrestled with his hatred of the man. The trope was lampshaded near the end of the title's run, when Tyler attempted to shock Miguel into following his orders by dropping the bombshell of his parentage, only to have Miguel, who by this point had come to terms with the fact, casually sip his coffee and then smugly and calmly reveal that he knows.
-->'''Tyler Stone:''' And you will do it... because I'm your father.\\
'''Miguel O'Hara:''' ''[sips coffee]'' Yeah, I know.\\
'''Tyler Stone:''' You... you know?\\
'''Miguel O'Hara:''' Yeah. Now get out of my office... '''dad.'''
* Mr. Sinister pulls a particularly unpleasant Luke, I Am Your Father on Gambit in ''[[Comicbook/XMen X-Men: The End]]'' when he reveals that Gambit is a clone created from Sinister's original DNA mixed with that of [[TangledFamilyTree Scott Summers]].
** Thankfully, this probably isn't canon -- the Summers have a messed-up history as it is.

* In ''ComicBook/ArchieComicsSonicTheHedgehog'', Knuckles' girlfriend Julie-Su discovers that she's the half-sister of Dark Legion leaders Kragok and Lien-Da, which also makes her a descendant of Knuckles' ancestor Dimitri (making her and Knuckles ''very'' distant cousins). And sometime later, it's revealed that Remington is Kragok's son.
** In a dark alternate universe, 30 years in the future, Lara-Su was raised to believe her father Knuckles had been killed by Constable Remington. However, after she goes back in time (and travels to the wrong dimension too), her mother Julie-Su finally tells her that, in fact, Knuckles wasn't killed by Remington, but went insane with Chaos Powers and became the dreaded leader of the Dark Legion and by extension tyrant of the entire planet, Enerjak.
* The original ''ComicBook/{{Gen 13}}'' had more of a "Luke You Are His Father", with Burnout and team mentor Lynch simultaneously learning that the former is the latter's long lost son.
* ''Gen-Active'' revealed A. Sublime of ''[=DV8=]'' isn't adopted, and B. her biological father is Michael Cray, alias Deathblow, one of the most prominent figures in the Wildstorm universe. Notably, it's revealed to the ''reader'', but not necessarily the characters -- Sublime's mother doesn't seem to remember his name.
* In the first ''[[ComicBook/GIJoeARealAmericanHeroMarvel G.I. Joe]]'' comic series, a boy named Billy living in the Cobra-controlled town of Springfield had joined the local anti-Cobra underground, believing that his father had been swayed into joining the organization by Cobra Commander. He'd failed to realize that his father ''was'' Cobra Commander all along. Destro knew the truth, however, and revealed it when he intervened to stop Billy from assassinating the Commander.
* ''ComicBook/{{Preacher}}'': "Mom?"
* ''ComicBook/{{Raptors}}'': Aznar Akeba turns out to be in fact Drago's son, resulting from his previous romance with a beautiful Indian woman.
* ''ComicBook/StarWarsDarthVader'' shows the inverse in issue #6: Boba Fett reveals to Vader that the boy who destroyed the first Death Star was named Skywalker. After Fett leaves, there's an InternalReveal flashing back from the end of ''Film/RevengeOfTheSith'' to a little after ''A New Hope'' (to Luke and Vader's first confrontation in a previous comic). Vader is mostly silent, but his hand is shaking with enough Force energy to shatter the glass window in front of him.
-->'''Vader:''' Skywalker.\\
''[Later -- Vader folds his arms. Scenes flash in his memory. Padmé crying. Padmé's funeral. The destruction of the first Death Star. His first confrontation with Luke.]''\\
'''Vader:''' [[LukeYouAreMyFather I have a son.]]\\
''The glass before Vader is almost completely gone now.''\\
'''Vader:''' He will be mine. It will all be mine.
* In Issue 6 of the ''Dallas'' arc of ''ComicBook/TheUmbrellaAcademy'', it's revealed that Number 1 and Number 5 are biological siblings (they were adopted siblings before this point).
* Tossed in a blender with LukeYouAreMyFather (but not really) in ''ComicBook/UsagiYojimbo'': Usagi discovered that his old flame Mariko's son Jotaro is actually his son, and Mariko's husband (Usagi's ''very'' unfriendly rival) also knows but loves Jotaro anyway. Usagi and Jotaro's sword master guessed almost immediately (they're very much alike), and gives them the opportunity to travel together for several months; after talking with Tomoe about responsibilities and relationships, Usagi decides not to break the bond between Jotaro and his family, while Jotaro decides not to force Usagi to give up his wanderer lifestyle to take care of him. It turns out Mariko told Jotaro the truth, but left out the part about Usagi knowing too. Upset at his "weakness" and the fact that he doesn't know when or if he'll ever see his "uncle" again, Jotaro calls out "Miyamoto Usagi! You are my father!!" but Usagi is already too far away to hear ("Just a trick of the wind, I must be tying my ears too tight"). TL;DR: Father A and Son B know they're related, but they don't know the other knows the truth (C,D,E, and F know the truth too but they aren't talking, mainly out of respect).
* ''Comicbook/{{Watchmen}}'' has a particularly twisted example of this. Laurie, the second Silk Spectre, knows from a tell-all book written years earlier that the recently-deceased Comedian [[AttemptedRape tried to rape her mother]], the first Silk Spectre. Then Laurie finds out that after the near-rape, her mother had consensual sex with him anyway, and that the Comedian is in fact her father.

[[folder:Comic Strips]]
* Parodied brilliantly in ''ComicStrip/FoxTrot''. [[{{Geek}} Jason]] is wearing his Darth Vader helmet to see [[Franchise/StarWars Episode III]], but gets stuck in his helmet. His father helps him get free, commenting that he had that problem with his Vader helmet when he was Jason's age.
-->'''Jason:''' Wait, you're saying that you were a ''Star Wars'' fan long before I was?\\
'''Dad:''' [[ShowTheirWork Search your feelings, you know this to be true.]]\\
'''Jason:''' [[BigNo NOOOOOOOOOOOOOOOOOOOO!!!!]]
* Parodied in ''ComicStrip/{{Mafalda}}''. Remember, the protagonists are all little children.
-->'''Susanita:''' Felipe, did you get me something for Mother's Day?\\
'''Felipe:''' Why should I get you something for Mother's Day?\\
'''Susanita:''' Well, I don't know how to say this... You have to get me something for Mother's Day because...\\
''(cue melodrama)'' I AM YOUR MOTHER!\\
'''Susanita:''' ''(disheveled and bruised)'' I don't understand, [[TVNeverLies it works in the soaps]]!

[[folder:Fan Works]]
* A handful of Harry Potter fics. A lot of Snape fans enjoy writing stories in which Snape is revealed to be Harry's biological father. Either Lily cheated or her whole marriage to James was a big, complicated ruse. Harry's reaction varies, but anger at being placed with the Dursleys when he had a living father the whole time is common.
** Some other fics have Hermione being the daughter of either Bellatrix Lestrange OR of Voldemort himself. Her reaction, most times, is being terrified.
-->Snape glared at him, black eyes glittering oddly. "Potter--I had sex with your mother sixteen years ago. You are the product of our union. In rudimentary language--you are my son." ''-[[https://www.fanfiction.net/s/2027554/1/In-Blood-Only In Blood Only]]''
** In ''[[http://www.fanfiction.net/s/9119753/1/The-Indecipherable-Riddle The Indecipherable Riddle]]'', Harry discovers he was kidnapped by James and Lily Potter as a baby (and that they fed him dangerous potions so they could pass him off as their own son) and that his true parents are Voldemort and Bellatrix Lestrange.
* Lampshaded in ''A Rose and a Thorn 3''.
-->'''Ashura:''' I am your father Luke -- I mean, Shadow.\\
'''Shadow:''' Shut up with the clichés already! You're not actually my biological father, are you? I saw that movie. I'm not going to do that stupid NOOOOOOOOOO thing.
** I'm afraid he really is... Well, one of them, anyway.
* NiceGuy foreign transfer student from another planet, dates the female DarkAndTroubledPast / TheWoobie character? Seems simple until you realise... That they're MUCH closer than intended... ''IncestIsRelative''.
* In ''[[http://www.fanfiction.net/s/4489465/1/Sonic_the_Hedgehog_Erazors_Revenge Sonic the Hedgehog: Erazor's Revenge]]'', it is reveled (by the author) that the evil Genie of the Lamp, Erazor Djinn is the father of Sharah the Genie of the Ring, the lesser genie.
* In ''[[http://percyjacksonfanfiction.wikia.com/wiki/Whispers_in_the_Dark Whispers in the Dark]]'', a popular ''Literature/PercyJacksonAndTheOlympians'' fanfiction, Luke pulls a "Taylor I Am Your Father."
* In the WesternAnimation/{{Coraline}} fanfiction ''[[http://www.fanfiction.net/s/5840525/1/ Right Beside You]]'', the Beldam captured Wybie and now Coraline and the Cat had to enter in the [[CrapsaccharineWorld the Other World]] to rescue him and there, Coraline learns that Wybie's true father is the Cat, actually named Richard. The Beldam killed his mother and transformed his father in a cat. Although it's based on a WildMassGuessing, it works very well.
* In ''[[http://www.fanfiction.net/s/6167065/4/The_Great_Dog_Detective The Great Dog Detective]]'', a crossover fanmake/FilmFic of ''Disney/TheGreatMouseDetective'', Fat Cat of ''WesternAnimation/ChipNDaleRescueRangers'' reveals to Garfield that the former is his father, much to the latter's dismay.
* In ''FanFic/ACureForLove'' V, an OriginalCharacter ActionGirl that is later revealed to be the BigBad is also revealed to be Mello's mother. [[CreateYourOwnVillain She wasn't there for him growing up because Wammy's House wouldn't let her near her son, deeming her "too broken to fix" and so trained her to be an assassin instead.]]
* Inverted in Fanfic/TwilightSparklesAwesomeAdventure; we go through the whole story thinking Celesia is Twilight's mother, but then at the very end her brother's ghost tells her that it's not actually true, and in fact she killed Twilight's real parents.
* In ''FanFic/TheNewRetcons'', Elly Patterson is Claire Thompson's biological mother, who was forced to give her up for adoption.
* In ''[[FanFic/YuGiOhTheThousandYearDoor Yugioh The Thousand Year Door Redux]]'', Vladmir, the Shadow Spawn of Darkness and the heir of the Empire of Shadow, is the son of Count Bleck.
* In ''Fanfic/EmpathTheLuckiestSmurf'', though Empath knew that he came from the Smurfs, what he didn't know until his 150th birthday is that he is Papa Smurf's only biological son, while the rest of the Smurfs were HappilyAdopted. This of course makes Brainy Smurf upset, because he always assumed that ''he'' was Papa Smurf's only biological son. (He turns out to be [[HeroicBastard Empath's illegitimate half-brother through the same mother]].)
* The ''WesternAnimation/RiseOfTheGuardians'' story ''[[https://www.fanfiction.net/s/8751000/1/Guardian-of-Light Guardian of Light]]'': While the story had been placing hints and a few readers had already guessed correctly, the reveal that Pitch is Helen's biological father still took many by surprise. The scene is an obvious ShoutOut to ''Franchise/StarWars'', but the author [[SuspiciouslySpecificDenial denies]] watching the film while working on the chapter.
* In the ''{{Disney/Frozen}}'' fanfic, ''Fanfic/FrozenHearts'', while Hans is trying to return to Arendelle, he and his brother [[OriginalCharacter Heins]] run into some pirates, and, after a while, recognize their captain as their brother, Heinrik. Later that chapter, and that day, they encounter Harry, who ran away from home and serves as a fence for Heinrik.
* In the climax of ''FanFic/SonicXDarkChaos'', [[{{Satan}} Maledict]] reveals that he is the creator and father of both Shadow and Sonic (and Eric as well). They were all early prototypes of Maledict's "Ultimate Weapon" project. None of them worked out; [[VideoGame/SonicAdventure2 Gerald Robotnik turned on Maledict and altered Shadow]], Sonic's fetus failed and Satan launched him out of a capsule to euthanize him, and Eric was literally flushed down the sewer after a catastrophic failure did... ''[[HumanoidAbomination something]]'' to him.
* In the Franchise/{{Pokemon}} fan fic ''FanFic/SpeakUp'', Giovanni, the leader of Team Rocket, is Red's father. The author got this idea from ''Theatre/PokemonLive''.
* ''FanFic/RosarioVampireBrightestDarkness Act II'' reveals that Kurumu's father is none other than the [[SatanicArchetype Lord of Hell]] himself, who conceived her with Ageha during a one-night stand; Kurumu herself remains unaware of this.
* In canonical Anime/SailorMoon Chibi-Usa is the daughter of Usagi and Mamoru. In Manga/RanmaOneHalf crossover ''FanFic/FistOfTheMoon'' there're hints that her parentage is different, but it isn't until Ranma goes down and Usa screams ''"Mommy!"'' that it's made obvious. [[spoiler: She later refers to Usagi as "Pops," foreshadowing the blonde's Jusenko boy curse.]]
* There are tons of ''Anime/{{Pokemon}}'' fanfics that imagine the Team Rocket leader Giovanni as being Ash's father. But many other theories exist. Since the 8th movie, for example, some writers have attributed Ash's aura to him being the son of Sir Aaron, or at least one of his descendants.
* ''Fanfic/PonyPOVSeries'': Discord reveals to Diamond Tiara that she and her mother are direct descendants of his mortal mother Shady [[note]]His actual mother is Entropy, but he once incarnated in Equestria as a mortal and was borne by Shady[[/note]], making him her great-great-something uncle.
* Inverted during the [[TimeyWimeyBall time travel arc]] of ''{{FanFic/Vapors}}''. Minato quickly guesses that [[GenerationXerox Naruto]] is his son, but it takes much longer for him to realize that Aiko is being snippy because she's his daughter an has abandonment issues.
* In the ''Series/StarTrekVoyager'' ParodyFic "Man of Wood" by Odon, an explanation for the canon CrackPairing of [[MsFanservice Seven of Nine]] and Chakotay is found when the latter discovers during a VisionQuest that his father is producer Rick Berman. He responds with the appropriate BigNo.
* In the Pokémon fanfic ''FanFic/TheRoadYouChoose'', the final story not only reveals that Ash's biological father is Pokémon Master Red, but also reveals that [[spoiler:Jessie of Team Rocket is actually Giovanni's daughter, and Ash's Sinnoh companion Dawn is his half-sister as a result of Red having an affair with Dawn's mother after he left Delia; Jessie's family ties to Giovanni are the reason her team has never been fired despite their mistakes, and characters such as Iris note that Ash and Dawn being related actually makes perfect sense in hindsight]].
* ''FanFic/TheEquestrianWindMage'' has a non-villainous example during Season 2, when Daring Do reveals that she's Rainbow Dash's mother, having [[ParentalAbandonment abandoned her with her father]] as a newborn, out of fear of not having what it took to be a parent. Dash [[CallingTheOldManOut chews her out]] for this, but her anger burns itself out, and they reconcile.
** Season 3 reveals that [[TheDragon Dethl]] is Vaati's father. Though this was heavily foreshadowed in the previous season, and straight up spoiled in the UniverseChronology.
* In ''Fanfic/TheLionKingAdventures'', it's revealed in Series 3 that Hago -- Simba's ArchEnemy and the OverarchingVillain of the series -- is actually Nala's father.
* During [[spoiler:Megane's]] cameo in ''Fanfic/{{Infinity}}'', it is implied that [[spoiler:Zest is Lutecia's father via a one night stand.]] The established timeline of events also implies that she never got the chance to tell him before [[spoiler:his death and her falling into a coma]].
* Near the end of ''Fanfic/MGLNCrisis'' Fate takes a DNA test and finds out that her father is actually Clyde Harlaown. One of the stories in ''Red Jewel Diaries'' has her looking deeper into it and discovering that [[spoiler:it was actually an aged up clone]]. Seeing as she was already related to Clyde due her adoptive mother Lindy being his widow, it doesn't change anything other than give her closure.

[[folder:Film -- Animated]]
* In the direct-to-video sequel ''Disney/AladdinAndTheKingOfThieves'', Aladdin discovers his father is the leader of the Forty Thieves.
* ''WesternAnimation/HowToTrainYourDragon2'' has Hiccup learn of a mysterious dragon rider who has been stealing dragons from another tribe of dragon riders; when he winds up captured by this person, he discovers that it's his long-lost and presumed-dead mother.
* ''WesternAnimation/{{Coco}}'': Miguel discovers that his idol, Ernesto de la Cruz, is actually [[spoiler: a fraud who murdered his ''real'' great-grandfather, Hector]], and that his family banned music because [[spoiler:Hector]] walked out on them to become a famous musician all those years ago. [[spoiler: Unbeknownst to them, Hector had every intention of coming back.]]
* ''WesternAnimation/ToyStory2'':
** [[TheParody Parodied]] with a Buzz Lightyear action figure (not the main one) and his archnemesis Evil Emperor Zurg reenacting a [[BeamMeUpScotty slightly modified]] version of the ''Franchise/StarWars'' reveal.
--->'''Zurg:''' Surrender, Buzz Lightyear! I have won!\\
'''Buzz:''' I'll never give in! YouKilledMyFather!\\
'''Zurg:''' No, Buzz, I ''am'' your father!\\
'''Buzz:''' [[BigNo NOOOOOOOOOOOOO!]]
** Later on, you see Buzz and Zurg having a father-and-son game of Catch.
--->'''Zurg:''' Go long, Buzzy!\\
'''Buzz:''' Oh, you're a great dad!

[[folder:Film -- Live Action]]
* The big reveal in ''Film/AngelHeart'' where Harry Angel is revealed to be Johnny Favorite, and therefore the father of Epiphany Proudfoot, who he has been having sex with, and has just murdered during a blackout; in a rather bizarre set of supernatural circumstances.
* [[TheParody Parodied]] in ''Film/AustinPowersTheSpyWhoShaggedMe'' with Dr. Evil claiming to be Austin's father (in an exaggerated voice akin to Vader's) and then admitting almost immediately that he was just making it up. [[spoiler: In a twist, the third movie features the revelation that Austin and Dr. Evil were in fact brothers, separated as infants.]]
* In the parody ''Backfire!'', the Most Evil Man reveals this to the heroes, complete with Darth Vader voice.
* Near the end of ''Film/BigMoneyRustlas'', before dying of a gunshot wound inflicted onto him by Sugar Wolf, the film's villain, Big Baby Chips, reveals to Sugar Wolf that he is actually his father, Grizzly Wolf, prompting Sugar Wolf to rub off his face paint to see if he was telling the truth. He was.
* In the movie ''Film/TheBoondockSaints'', the hitman known as Il Duce, who previously gave the [=MacManus=] brothers the fight of their lives, is revealed to be their long-lost father when he walks in on them delivering the family prayer to their fallen comrade Rocco (whom he had previously been hired to kill) and finishes the prayer himself. And then much ass was kicked.
* ''Film/CandymanFarewellToTheFlesh'' has the main protagonist Annie discover that she is the great-great-granddaughter of the Candyman.
* In the 2003 film version of the Filipino superhero ''Captain Barbell'', the BigBad [[PlayingWithFire Lagablab]], reveals he is Enteng's (Captain Barbell's mortal alter-ego) DisappearedDad. Captain Barbell is shocked but defeats him anyway.
* The 2002 adaptation of ''Film/TheCountOfMonteCristo'' has Robert revealed as the son of Edmond, conceived right before Edmond is framed for treason and shipped off to prison 16 years earlier.
* Taken to ridiculous extremes in ''Film/DirtyWork''. Mitch and Sam are talking to Sam's father, Pops, who reveals he's also Mitch's father. They don't believe him; so he pulls out a locket:
-->'''Mitch:''' That's you and my Mom!... having sex!\\
'''Sam:''' You were unfaithful to my mom!\\
'''Pops:''' No I wasn't. Who do you think took the picture?\\
'''Sam:''' Hey, Mitch, remember when you had sex with my sister?
* It is [[SpoilerTitle pretty obvious]] in the French 1961 film ''Le Fils de Caroline Chérie'' that Juan is the son of Caroline and Gaston de Salanches, but the characters themselves don't find this out until the last fifteen minutes.
* ''Film/TheManFromEarth'': in the end what confirms that John wasn't lying about his claims to be an ageless immortal was when Gruber (a colleague of John's who appears to be about twice John's age) realized that John is his father. (John had suddenly left his family at the time when Gruber was just a few years old.) The shock ends up giving Gruber a heart attack and he dies shortly after.
* Before dying at the end of ''Film/TheManInTheIronMask'', D'Artagnan barely has the time to reveal to Philippe (and Louis) that he is their father.
* Subverted masterfully in the movie ''[[Film/TheBoatThatRocked Pirate Radio]]'', throughout most of which it is implied that Quinten is Young Carl's father, only for it to be revealed by Young Carl's mother that Bob, the 3-6 am DJ is his father instead. Quaintly enough, Young Carl?s reaction is eerily similar to that of the trope namers.
* ''Film/{{Scanners}}'': Darryl Revok, the villain, reveals that he and Cameron Vale, the hero, [[CainAndAbel are the sons]] of Dr. Paul Ruth, the BrokenPedestal mentor.
* In ''Film/TheSmurfs2'' Gargamel quotes the full line to Smurfette: "I am your father. Search your feelings, you know it to be true".
* [[TheParody Parodied]] in ''Film/{{Spaceballs}}'':
-->'''Dark Helmet:''' I am your father's brother's nephew's cousin's former roommate!\\
'''Lone Starr:''' What does that make us?\\
'''Dark Helmet:''' Absolutely nothing, which is what you are about to become!
* ''Franchise/StarWars'':
** TropeNamer. This is TheReveal from [[Film/TheEmpireStrikesBack the second part]] of the original trilogy.[[note]]The line as it's frequently quoted is actually a PopularMisquote.[[/note]] The reason that this reveal worked and a lot of the imitators fell flat was that a big part of Luke's story revolved around his [[TellMeAboutMyFather Jedi Knight father]], whom he sought to emulate as a Jedi himself, which was ''why'' Luke let out the BigNo in response to the AwfulTruth about said father being revealed. In addition to that, this also means that both Obi-Wan and Yoda had been lying to him ever since they met. It also gives new light to Uncle Owen's reasons for refusing to let Luke accept the CallToAdventure, in particular Aunt Beru's assessment that "he's got too much of his father in him" and Owen's response "That's what I'm afraid of". Also, the reveal in ''Film/ReturnOfTheJedi'' is that Leia is Luke's sister.
** According to Wiki/TheOtherWiki, this was meant to be played again in ''Film/RevengeOfTheSith'', where Palpatine would tell Anakin that he created him from midichlorians, before Lucas heavily changed the script, although the implication that Plagueis created him was nonetheless present. It was nonetheless implied that Palpatine was at least somewhat involved alongside Plagueis in manipulating the midichlorians into creating him in ''Literature/DarthPlagueis'', although Anakin's creation was actually not just an accident (they were intending to manipulate them into creating a Sith weapon), but they [[TheDogBitesBack struck back]] and [[NiceJobFixingItVillain created the very means to destroy them]].
** Happens yet again in ''Film/TheForceAwakens''. This time, [[spoiler:Han Solo and Leia Organa are Kylo Ren's parents, although this is only a surprise to the audience, not the characters]].
* ''Film/TheTerminator'': Kyle Reese is John's father by TimeTravel.
* ''Film/{{Transamerica}}'': when Toby, a teen runaway who had made a living as a hustler and who seems to only show affection sexually, attempts to seduce the {{Transsexual}} woman, Bree, who is adopting him, her only recourse is explain him that she was, in fact, his ''father'' before transitioning. She'd kept it secret from him because she knew he thought his father was a famous actor and didn't want to disillusion him. The fact that the audience already knows this is a considerable source of {{Squick}} in the scene.
* {{Inverted|Trope}} in ''Film/TronLegacy'' when Sam Flynn seems to finally find his [[DisappearedDad lost father]] on [[{{Cyberspace}} the Grid]]; it turns out only to be a program written by Dad, though the dialog is almost verbatim.
-->'''CLU:''' I'm not your father, Sam. But I'm very, very happy to see you.
* In the film ''Film/{{Wanted}}'', this is used as the twist about 3/4ths of the way through the film. It actually makes sense, because it's the only reasonable explanation for why Cross never seems to be able to hit Wesley despite his improbable superpowered gun skills; turns out he was never trying to kill him in the first place.

* Literature/TheRadix: Played with. The fact that Edgar Wurm is Adriana Borgia's father comes as a surprise for the reader, but both characters have known it from the beginning.
* Inverted in ''Literature/TheChroniclesOfPrydain'', where Taran goes on a search for his parents. He encounters a crippled shepherd who reveals that he is Taran's father but after a few months of living with Taran, the guy has a fatal accident and reveals that he was lying, that his son died years ago and that he told Taran this because he was so lonely.
** Inverted again at the end of the series, when it's revealed that the identity of Taran's parents will never be known.
* Creator/TerryPratchett does a great job of LampshadeHanging on this one in the ''Literature/{{Discworld}}'' novel ''Discworld/{{Maskerade}}''. In an early scene, Nanny Ogg explains the plot of the opera ''La Triviata'' to Granny Weatherwax thusly: "Well, there's a lot of humorous dressin' up, etcetera, someone will probably turn out to be someone's long-lost father or somethin'..." Near the end of the book, it is revealed that the star singer in the production of ''Il Truccatore'' really ''is'' the long-lost father of a young man in the audience. When Agnes (the junior witch) complains "This sort of thing ''does not happen''!" the more GenreSavvy Nanny replies, "Happens all the time in opera."
** A more interesting variation happens in ''Discworld/ThiefOfTime''. First, Susan has to tell Lobsang Ludd that he and Jeremy Clockson are the twin sons of the AnthropomorphicPersonification of Time. Later, she admits she was lying, sort of: Lobsang and Jeremy aren't twins, they're [[StarfishCharacter the same individual]], bifurcated at birth by the complexities of Time going through labor. For that matter, Susan's discovery that there are other children of {{Anthropomorphic Personification}}s, and natural-born, not adopted, almost qualifies but fails the "met before" requirement.
** Subverted in ''Discworld/WitchesAbroad'', where Mrs. Gogol never does more than hint to Ella that she's her mother.
* This happens not once, but ''twice'', and to the ''same character'', in Ann Radcliffe's 1796 Gothic novel, ''Literature/TheItalian''. In the first instance, the evil monk Schedoni is about to murder the virginal heroine in her sleep when he happens to glimpse her locket -- her ownership of which reveals that she is (gasp!) ''his long-lost daughter!''... Only, turns out she isn't. Still, it was a pretty good reveal, wasn't it? She actually turns out to be the long-lost child of a nun who was nice to her earlier in the book, and to whom she'd previously felt a "mysterious connection."
** Even though it turns out that Schedoni isn't Elena's father, he does turn out to be the brother of her long-deceased father whom he closely resembles, making him her uncle. Thus, this is perhaps an example of EveryoneIsRelated.
* ''Literature/InheritanceCycle'': Murtagh reveals that the evil Dragon Rider Morzan was Eragon's father, making Eragon and Murtagh brothers. This is subverted in the third book, when it turns out that Morzan is not Eragon's father, and it was actually Brom, who fell in love with Selena, Morzan's consort (also known as the Black Hand), thus making Murtagh and Eragon only half-brothers. There is also a scene where Arya is revealed to be the daughter of the elf queen Islanzadi, but this may or may not qualify since both Arya and Islanzadi knew about it even if the reader did not.
* In ''Literature/TheWildHuntTrilogy'', Judith's father is revealed to be her husband's friend, seduced at age 14 by her mother to appease her husband's demand for an heir.
* ''Literature/HisDarkMaterials'': Lyra's father is Lord Asriel, the man she thought was her uncle, while her mother is Mrs. Coulter, the first book's major villain. Though this could be seen as a rather knowing use of the trope, given that the reveal occurs unusually early in the story. In the film adaptation, on the other hand, it appears in the typical place as a third act plot twist.
* In Creator/RobertAHeinlein's short story ''Literature/AllYouZombies'', the main character is revealed to be ''[[MyOwnGrampa his own]]'' father. And mother. And responsible for getting them together. And taking away his baby self away and putting her in an orphanage. And he's the bartender selling booze to most of the above throughout the story. Did we say "main" character? We meant ''only'' character.
* In Creator/TerryGoodkind's ''Wizard's First Rule'', the first book of the Literature/SwordOfTruth series, it is revealed that Richard is actually the son of Darken Rahl, the antagonist. Yes, his name is ''[[NamesToRunAwayFromReallyFast Darken]]''. And he's the father of the protagonist, who has a magic sword, and is taught by an old man.
* The [[Series/LegendOfTheSeeker TV series]] loosely based on the books also follows the trope but replaces Luke, I Am Your Father with Luke, I Am Your Brother, and this time, Zedd is not the one who reveals the truth. The substitution is likely because the actor playing Rahl is much younger than the character in the novel, making Richard only about 10-15 years Rahl's junior in the show. This is one of Goodkind's better instances of PlayingWithATrope. It starts with Darken Rahl accusing [[OldMaster Zedd]] of being Richard's father. Zedd responds, in short, "Actually, I'm his grandfather. Remember how [[RapeAsDrama you raped my daughter?]] ''You're'' his father." Richard is not present for this scene, and doesn't find out himself about either of these relations until the next book.
* Creator/CharlesDickens had a thing for lost parents.
** In ''Literature/GreatExpectations'', Magwitch, Pip's benefactor, turns out to be Estella's father.
** In ''Literature/BleakHouse'', Lady Dedlock and Captain Hawdon ("Nemo") are Esther Summerson's mother and father.
** In ''Literature/NicholasNickleby'', Ralph Nickleby turns out to have been Smike's father, but he only finds out after Smike's death. The revelation drives him to suicide.
** In ''Literature/OliverTwist'', Mr. Brownlow is an old friend of Oliver's DisappearedDad, Edwin Leeford, and he actually adopts Oliver as his son in the end. What else? The SmugSnake Monks is Oliver's half-brother (real name: Edward Leeford) and Rose Mayley is Oliver's aunt (his [[DeathByChildbirth deceased mother Agnes]] was Rose's older sister). (The musical ''Theatre/{{Oliver}}'' simplifies matters enormously by making Mr. Brownlow Oliver's grandfather and leaving Monks and the Mayleys out entirely.)
** The best Dickensian example of this trope is in ''Literature/BarnabyRudge'', in which the mysterious robber, murderer and general villain that has haunted the book turns out to be Barnaby's father. He even reveals this using the phrase "I am your father". If only he'd said "Barnaby, I am your father" it would be perfect. Being simple-minded, Barnaby doesn't react with the same horror as Luke.
* Done intelligently in Creator/RafaelSabatini's romantic historical adventure ''Literature/{{Scaramouche}}'': André-Louis Moreau spends most of the book as the nemesis of the abhorrent Marquis de La Tour d'Azyr, who dun DUN DUN, unsurprisingly turns out to be his father--but Andre-Louis has never particularly cared for anyone except his ParentalSubstitute; and the fact is resolved within a couple chapters.
** The [[Film/{{Scaramouche}} 1952 movie]] had the Marquis turn out to be his older brother.
* In Creator/GarthNix's ''Literature/OldKingdom'' series, Lirael finds out the identity of her real father at the end of book two: it's the former Abhorsen, Terciel, making Lirael Sabriel's younger sister, and Sameth's aunt. This accounts for much of Lirael's {{Wangst}} -- that is, morbid tendencies, et alia. Fortunately, she had already [[IncestIsRelative prevented her nephew becoming attracted to her]] by saying that she was thirty years older than him.
* Creator/NeilGaiman's ''Literature/AmericanGods'': Shadow's father is Mr. Wednesday, the man who hires him after he is released from prison. Mr. Wednesday is also the Norse god Odin.
** Shadow's real name also happens to be [[MeaningfulName Baldur]].
* ''[[{{Literature/Wicked}} Son of a Witch]]'': While the title implies it pretty strongly, it's left very much in doubt whether Liir is Elphaba's son until the very last line, when Liir's own newborn daughter is revealed to be green like Grandma. Apparently the complexion is genetic, but only expressed in females.
* In Meredith Ann Pierce's ''Literature/TheFirebringerTrilogy'', Jan, the lead character and prince of the unicorns (all the main characters in the trilogy are unicorns), discovers in the third book that his father Korr mated with another mare before he pledged himself with Jan's mother--which is something of a problem, as the other mare's child is Jan's own mate and the mother of his children, and unicorn custom absolutely forbids incest. Lucky thing then that it turns out the mysterious, renegade stallion Calydor, who Jan felt oddly connected to upon meeting for the first time, was actually Jan's mother's first love--and Jan's biological father.
** Another Meredith Ann Pierce example: the white witch Oriencor is actually the daughter of Ravenna the Ancient. Her excuse for becoming the BigBad was that she felt cheated of her inheritance since Ravenna promised, falsely, that she could one day return to Oceanus with the Ancients; Oriencor's schemes to take over the world are really just Part One of her attempts to get there on her own. The heroine of the trilogy, Aeriel, also has one: raised an orphaned slave in the land of Terrain, she later discovers she's the heir to the suzerainty of Pirs. Made squicky by her uncle, who killed her father and attempted to force her mother to marry him, and tries to seduce Aeriel.
** And another: ''Treasure at the Heart of the Tanglewood''. Hannah is the "daughter" of the Queen, having grown from the branch the Wizard stole. Pierce ''really'' likes this trope.
* In the ''Literature/{{Animorphs}}'' supplemental novel The Andalite Chronicles, we find out that Elfangor, the Andalite prince that gave the kids the power to morph, is actually Tobias' father, from some fancy [[TimeyWimeyBall time manipulation]] care of the [[AWizardDidIt Ellimist]].
** Marco's mother has been taken over by the leader of the invaders.
* In ''Literature/TheNightAngelTrilogy'', the Godking does this to both the protagonist and someone else. In the protagonist's case, the Godking is just screwing with his mind. In the latter case, she kills him anyway.
* In ''Literature/TheLastBookInTheUniverse'', Spaz finds out from Ryter in the final moments of his life that Billy Bizmo is his father and Lotti Getts is his mother.
* In Creator/ChristopherMoore's ''Literature/{{Fool}}'', titular character and king's fool Pocket learns that his father was King Lear's brother, since Lear made him rape Pocket's mother. Uh-huh. (This means he's been screwing and lusting after his first cousins.)
* Done '''twice''' in Karen Miller's ''Literature/GodspeakerTrilogy''. In Dmitak's case it's moments before he kills his mother and gets killed himself.
* Inverted (and partly subverted) in Creator/RobinHobb's ''[[Literature/RealmOfTheElderlings Tawny Man Trilogy]]'' where the main character is forced to interact with his children, who don't know who their real father is.
* In the first book of Richelle Mead's ''Literature/DarkSwan'' series (''Storm Born''), it is revealed, fairly early on, that Storm King is Eugenie's father. On a slightly different note, it is also revealed, much later on - close to the very end of the book, in fact - that Jasmine is her half-sister.
* In ''Literature/SavingTheWorldAndOtherExtremeSports'', Max is horrified to learn that [[spoiler:the Director and leader of Itex is her mother. Later, Jeb informs her that this is a lie and he is her real father and Dr. Martinez is her real mother]]. She takes this revelation much better, though is just as shocked.
* In the Literature/BrotherCadfael novel ''The Leper of St. Giles'' by Creator/EllisPeters, the titular leper turns out to be the unwilling bride's long-lost grandfather, whom everyone thought had died in the Crusade. Subverted in that, while he admits the truth when Cadfael confronts him about it, his leprosy has disfigured him so badly that he refuses to reveal himself to anyone else, not wishing to be a burden or to spoil tales of his HeroicSacrifice.
** Cadfael himself also turns out to be the father of Olivier, a young man from the Holy Land who makes his first appearance in "The Virgin in the Ice."
* In ''Literature/AllTheKingsMen'', Judge Irwin was revealed to be Jack Burden's father at the precise moment it was also revealed that he had shot himself.
* Near the end of Hannah Tinti's ''The Good Thief,'' Ren discovers that he is the son of McGinty's sister and Benjamin Nab. That last is a [[ConsummateLiar big maybe]], however.
* In ''Literature/VillainsByNecessity'', it turns out near the end (hinted at earlier subtly) main antagonist Mizzamir is Sam's father, and wiped his mother's mind after raping her, proving LightIsNotGood, indirectly helping to put Sam into his life of being a cold-blooded hired killer.
* Played with in Brandon Sanderson's ''Literature/{{Mistborn}}''. Main character [[ActionGirl Vin]] knows from the beginning of the story that her father is an important nobleman (she inherited [[ExtraordinarilyEmpoweredGirl her powers]] from him), but doesn't know his identity. He turns out to be Tevidian, High Prelan (priest) of the CorruptChurch and right-hand-man to [[EvilOverlord the Lord Ruler]]. Surely this leads to a dramatic moment where the rebel Vin confronts and defeats her badass [[TheDragon Dragon]] father? Wrong--when we meet Tevidian, he turns out to be a coward who toadies to the Inquisitors (the ''real'' Dragons) and gets killed offhand for [[YouHaveOutlivedYourUsefulness essentially annoying them]] without ever getting a chance to ''speak'' with his daughter. But honestly, nobody was really that torn up about it.
* ''Literature/TheLostSymbol'': The main antagonist throughout the book is revealed to be the son of one of the main protagonists.
* In Creator/BenBova's ''Venus'', the protagonist, Van, is really Fuchs' son, not Humphres'.
* Done once or twice in ''Literature/{{Evil Genius|Trilogy}}'': Cadel knows his adoptive parents aren't his real parents, and he's told by his psychologist, Thaddeus, early in the story that his "real" father is Phineas Darkkon, and his mother is dead. Later in the novel, however, Thaddeus mentions how lucky it is that Cadel looks like his mother rather than his father, which confuses Cadel. It's [[TheReveal revealed]] that Thaddeus is actually Cadel's father, which nearly gives him a HeroicBSOD.
* In ''Film/{{Shocker}}'', the main villain reveals himself to be the protagonist's father before he is executed in the electric chair and is turned into a PsychoElectro.
* In ''[[Literature/FloraSecunda Flora's Dare]]'', Flora learns that Hotspur really is her father, but her biological mother is the notorious Butcher Brakespeare.
* In ''Literature/TheWarlordChronicles'', Derfel gets an unusually subtle version of this from Aelle, who instead of telling him straight out instead [[EvenBadMenLoveTheirMamas criticises him for not visiting his mother]] and leaves him to work it out for himself. Later, Aelle declares Derfel to be the best of all his sons. Just before Derfel kills him.
* Used straight in ''Literature/MemorySorrowAndThorn'', with the revelation that Camaris is Josua's father, rather than King Prester John, and rolled into the {{Aesop}} that lies told and retold are what shape civilizations. This also retroactively explains the CainAndAbel relationship between Josua and Elias, even before their falling out over the death of Elias' wife.
* ''Literature/TheHunchbackOfNotreDame'': Gudule is Esmeralda/Agnes'a mother. If you know about Creator/VictorHugo's love for OneDegreeOfSeparation, you saw it coming.
* In Creator/AlanGarner's ''The Owl Service'', Gwyn has just found proof that Huw, the mad gardener, [[LoveMakesYouEvil killed]] his mother's lover Bertram and [[YouKilledMyFather accuses Huw of killing his father]]. Huw then reveals that he is Gwyn's father.
* In ''Literature/WarriorCats'', the former Thunderclan leader Bluestar is revealed to be the mother of three Riverclan cats, Mistyfoot, Stonefur, and Mosskit. The kitten died though.
** Yellowfang also [[TheReveal reveals to]] [[BigBad Brokentail]] that she is his real mother, after she fed him the deathberries that would '''kill him'''.
** In the third series Leafpool reveals that she is the mother of the Three.
** The sixth series has a rare heartwarming example: [[spoiler:Hawkwing]] reveals to [[PluckyGirl Twigpaw]] that he is her father; he had believed that she and her sister [[BrokenBird Violetpaw]] were both dead, and is overjoyed to meet them for the first time.
* ''Literature/TheDresdenFiles'': Harry Dresden gets this once proper and a second time revealed by a third party.
** In ''Literature/BloodRites'' [[FriendlyNeighborhoodVampire Thomas Raith]] who has helped Harry out the past few years reveals he is Harry's older half-brother by Harry's mother. Harry even lampshades this, when not fully believing Thomas by saying, "This is where you say, 'Search your feelings, you know it to be true.'" It takes a soulgaze for Harry to accept this as truth.
** In ''Literature/{{Changes}} Harry's enemies have kidnapped his until-past-few-days unknown daughter as vengeance. Not against him directly, though that is the icing on the cake. They plan to use her in a blood sacrifice that will kill all his blood relatives and her mother's blood relatives as vengeance for the slaying of Red Court nobleman. Their target, the assassin, is the father of Harry's mother, Ebenezer [=McCoy=], who dropped a satellite on the nobleman's home for his trying to kill Harry. Before this, Harry just thought of Ebenezer as a second mentor and surrogate parent figure. After the climax of the book, Ebenezer confirms the truth to Harry.
* In L. Jagi Lamplighter's ''[[Literature/ProsperosDaughter Prospero in Hell]]'', Miranda learns that her mother was not who she thought she was. (Her half-siblings let it slip, not realizing she doesn't know.) She's Caliban's half-sister! And while Creator/WilliamShakespeare fictionalized some events in ''Theatre/TheTempest'', the AttemptedRape in the {{Backstory}} is not one of them.
* Played with for Mareth, the young Druid-in-training in ''[[Literature/{{Shannara}} First King of Shannara]]'', has revealed to her during the course of the journey that the innate, nearly out-of-control magic she possesses was inherited from her father--''[[{{Squick}} a Skull Bearer]]''. [[KillItWithFire She has the appropriate reaction]], and almost succumbs to a HeroicBSOD until Kinson Ravenlock snaps her out of it. In the end, however, it is never revealed if this was actually the truth, or part of a trap by the Warlock Lord to ensnare her powerful magic through her longing for her DisappearedDad.
* In ''Literature/TheMysteriousBenedictSociety'', Kate's DisappearedDad is revealed to be Milligan.
* It's played straight in ''Literature/OnTheJellicoeRoad'' with Taylor, who finds out who her dad is the boy in the picture and her aunt is Hannah. This is played with for Jessa; Taylor (a third party) finds out her father is the Hermit late in the story but its unclear if Jessa connects her dad to the Hermit.
* Inverted in ''Literature/{{Dune}}'', as it is actually Alia Altreides who reveals her relationship to Harkonnen, her grandfather, just after she poisoned him, and it is actually Harkonnen who is shocked at the lineage. [[spoiler: It also comes to bite her in the ass in ''Literature/ChildrenOfDune'', as being related to him allows his genetic memory to possess her.]]
* In Creator/StephenHunt's ''The Rise of the Iron Moon'', Black is astounded to recognize his own features in his daughter; he had seen her mother fall, with a head wound, in a fight.
* An example from ''Literature/{{Harald}}'': Though the individual characters know the relationship from the beginning, [[UnwittingPawn King James]] is lead to believe that [[BadassGrandpa Harald]] will join him against [[ActionGirl Carala]], and he gets this sort of surprise when Harald reveals that he's her father.
* In the ''Literature/AlcatrazSeries'', Alcatraz Smedry learns that The person he thought was his emotionally abusive social services case worker was really his mother and one of the evil librarian cultists that rule the world.
* ''[[Literature/ClockworkCentury Boneshaker]]'': Dr. Minnericht is said to be the (supposedly) dead MadScientist father of one of the main characters. [[SubvertedTrope He's lying.]]
* Mrs Lestrange (no, not [[Literature/HarryPotter that one]]) is Lettice Protheroe's mother in ''Literature/TheMurderAtTheVicarage''.
* Pol discovers that Ianthe is his mother and not Sioned as he believed in Melanie Rawn's ''Literature/DragonPrince''. The readers know this before he does.
* Literature/SeptimusHeap:
** At the end of ''Magyk'', Boy 412 is revealed to be the Heaps' supposedly dead son Septimus.
** In ''Flyte'' the man who keeps asking people about Jenna turns out to be her father, Milo Banda.
* At the end of Creator/FredSaberhagen's ''Empire of the East'' trilogy, the [[BigBad demon prince Orcus]] realizes that [[BigGood Ardneh]] is his father in a sense (not the biological sense, since neither being is biological), ''and'' that, [[ThanatosGambit in killing Ardneh, he has also destroyed himself]].
* In Creator/MichaelFlynn's ''[[Literature/SpiralArm Up Jim River]]'', Donovan is in denial, and the harper doesn't want to talk about once she realizes. When Donovan puts it together, the conversation that ensues has both this, and LukeYouAreMyFather.
* In the historical novel ''Literature/WingsOfDawn'': Thomas and Lord Hawkwood.
** Also Luke I Am Your Love Interest's Father, with Thomas and Sir William. %% This entry was added automatically by FELH2. In case the wording doesn't make sense, rewrite it as you like, remove this comment and tell this troper.
* In ''The Wildcats'' by Creator/JTEdson, Calamity Jane discovers that Madam Bulldog is actually her mother.
* In the Brazilian book ''Lobo Alpha'' (Alpha Wolf) the main character (Amy) finds out about Creatures (beings that can change shape into animals) and befriends (soon falling in love) with Marco, a Wolf Creature (white wolf to be precise) who is the Omega of his pack. Some time after, they find out that Amy is adopted and that she, too, is a Creature after being killed -only turns out she wasn't- by Bloter while Marco was fighting Cannish (Members of Marco's pack). Amy is called a Crossbred (meaning that one of her TRUE parents was a creature and the other was a human. Although this breeding is rare, she eventually meets another Crossbred near the end of the book). She learns more about her true mother, Yuu. At first everyone (and I do mean EVERYONE) thinks that Amy is the daughter of Wulfmayer (the Alpha wolf, who had been in love with Yuu despite being married) until, during a dinner with the said pack, Wulfmayer reveals that he raped Yuu (along with Bloter) but didn't kill her because he felt she was pregnant and that Amy is actually Marco's daughter (cuts to "eeeewww" since they were in love and had already had sex).
** Only, right after, Marco and Amy talk and he reveals he cannot be her father, since he and Yuu were never close in that level, Wulfmayer just assumed it because they were always together. Amy's father turns out to be Cannish. Amy is LESS than pleased, which makes it harder when they have to travel together.
* ''Literature/TheMortalInstruments'':
** Jonathan Clark, the man Jocelyn told Clary was her father, was just a mere acquaintance. Clary’s real father is Valentine Morgenstern.
** Michael Wayland was never Jace's father. Valentine Morgenstern is, he raised Jace while under the guise of Michael Wayland. Though ''City of Glass'' reveals that Jace's father was actually Stephen Herondale. Valentine adopted him after his mother died, but [[SecretOtherFamily he kept him a secret from his real son, and vice versa]].
* At the end of ''Literature/TheAmazingAdventuresOfKavalierAndClay'', Joe is revealed to be Tommy's real father. Sam married Rosa after the child's conception to conceal Joe's out-of-wedlock parenthood as well as his own homosexuality.
* ''Literature/VampireAcademy'':
** In ''Blood Promise'' it is revealed that Rose's father is Abe Mazur. Funny thing is, she doesn't find out till after she's back on the other side of the world. And then her reaction is just priceless:
-->"Oh God," I said, "I’m Zmey’s daughter. Zmey Junior. Zmeyette, even".
** Happens to Jill in ''Last Sacrifice'' when she finds out that Eric Dragomir is her father and she's royal. Subverted in that Eric knew about her and she never meets him due to finding out after his death.
* Occurs in Creator/AgathaChristie's ''Literature/HerculePoirot'' series (and the ''Series/{{Poirot}}'' TV adaptation based on it):
** In ''The Clocks'', Millicent Pebmarsh is the mother of Rosemary Sheila Webb, but only in the original novel.
** In the ''Poirot'' adaptation only, Frances Cary is Norma Restarick's half-sister in ''Third Girl''; Dr. Theodore Gerard and Dame Celia Westholme are the actual biological parents of Jinny Boynton in ''Appointment with Death''; and Marie [=McDermott=] is the cousin of Celia Ravenscroft in ''Elephants Can Remember''.
** In both the novel series and TV adaptation, it happens near the end of ''The King of Clubs'' and ''Dead Man's Mirror'' [[spoiler: In the former story the glamorous actress turns out to be a daughter of the middle class suburban family who succored her, a fact they all wish to hide; and in the second story the murderer is the birth mother of the victim's adopted daughter, Poirot agrees to keep her secret]]. Also in ''Literature/SadCypress'', and ''[[HalloweenEpisode Hallowe'en Party]]''. The latter depends on the ending: [[spoiler:while Michael Garfield poisons himself with the drink he prepared for Miranda Butler ''before'' it is revealed that he is her father in the original novel, making the ending so bittersweet, the TV adaptation has Michael get arrested for attempting to poison her, and allows him time to reveal himself as her father in the denouement scene. It feels so much more like a brief family reunion, but heartwarming nonetheless.]]
* In the second book of ''Literature/TheCasteelSeries'', ''Dark Angel'', it is revealed that [[spoiler:Heaven is the daughter of Tony Tatterton, who she thought was only her step-grandfather. Tony had been repeated raping Heaven's mother Leigh, who had ran away after finding out she was pregnant.]] This is played with in the fourth book, ''Gates of Paradise'', where [[spoiler:Heaven's daughter Annie finds out her real father is Heaven's uncle Troy. Annie doesn't learn this until the end of the book, but it's spelled out pretty clearly in the previous installment, ''Fallen Hearts'']].
* Jacek Soplica, the MysteriousParent of the titular ''Literature/PanTadeusz'', turns out to be father Robak - a [[AgentProvocateur politically active]] monk.
* ''Literature/WelcomeToNightVale'': Josh wants his mother Diane to tell him more about his missing father Troy. Jackie suffers from amnesia and does not remember that her father is also Troy, through use of TimeTravel and magical cloning, making Jackie and Josh half-siblings.
* In ''Literature/DarkLordTheRiseOfDarthVader'', Roan Shryne and Olee Starstone, a pair of fugitive Jedi, fall in with a crew of smugglers. Their captain Jula just happens to be Shryne's mother--his father had given him up to the Jedi over her objections. Jula is Force-sensitive herself and claims to have guided her ship to them on purpose.
* Subverted in the ''Literature/GentlemanBastard'' books with Locke, whose only memory of his mother is a hazy image of sewing, when he meets a Bondsmage who reveals that she once once called herself "Seamstress". She dryly agrees with his horrified "No!" and confirms that they're not related -- [[spoiler:but that they ''do'' have a history]].
* In ''[[Literature/NightWatch Sixth Watch]]'', Zabulon reveals that he is actually Anton's grandfather. Anton was originally supposed to be a Dark Other, but Gesar deliberately initiated him on a good day in order to turn Anton to the Light, as he didn't believe that Svetlana would marry a Dark Other. Zabulon's hatred for Anton is partly driven by Anton ''liking'' being a Light one.
* Doctor S in ''LightNovel/TheUnexploredSummonBloodSign'' is actually Kyousuke's father (the 'S' stands for Shiroyama, their surname).
* Not ''father'', exactly, but the eponymous heroine of ''Literature/{{Friday}}'' discovers ... after his death ... that she's genetically related to the man she knew as [[Spoiler:Boss].

[[folder:Live Action TV]]
* Masterfully inverted, gender-swapped, and played without melodrama in ''Series/TheTenthKingdom'', when via the magic mirror Virginia and her father learn that the Evil Queen is her missing mother Christine. This trope combined with that of the MysteriousParent (though here there is no revelation about the child). What makes it particularly unique is that, rather than the villain making the revelation, it comes from a third party (in this case a magical object), and it is the hero who must then convince their erstwhile parent of the truth, rather than the reverse. The tragedy ensues when Virginia breaks through to her real mother after the poison comb has loosed her from the Swamp Witch's spell, [[TearJerker she remembers who she is and declares her love...and dies in her daughter's arms.]]
* Infamously used on ''Series/TwentyFour'' where the other mastermind of Day 5 that was working with Charles Logan later turned out to be Jack Bauer's brother.
* ''Series/AllMyChildren'' loves this trope. Examples: Daisy Cortlandt and Myra Murdock (Nina's "dead" mother and long-lost grandmother), Palmer Cortlandt (Ross Chandler's long-lost father), and Jackson Montgomery (Greenlee Smythe's real father). In 2006, the show waved a magic {{Retcon}} wand to reveal Josh Madden is Erica Kane's son. It seems he was originally aborted but during the termination procedure, Dr. Greg Madden took Erica's fetus to implant into his wife and raise as his own son.
* Caleb and Sheriff Buck of ''Series/AmericanGothic1995''. Unique in that it is revealed ''in the pilot of the series'', and that while Caleb reacts in disgust and anger at the notion, he never has a HeroicBSOD or otherwise freaks out over the revelation. In fact the more time passes, the less issue he seems to take with it, even welcoming and embracing the relationship by the end of the series. This could be due to being orphaned and having no one else to turn to except an increasingly unstable doctor and a [[strike:CoolBigSis]] cool cousin [[EvilIsSexy who is also being drawn into Buck's orbit]], but [[DemonicPossession all things]] [[InTheBlood considered]], [[StartOfDarkness probably not]].
* On ''Series/ArrestedDevelopment'', Oscar is really Buster's father, GOB is Steve Holt's father, and Lindsay is adopted.
* At the end of ''Bangkok Hilton'', Kat finds out that Bill Worthington, the man who helped her escape from the titular prison, is her father Hal Stanton. The audience, incidentally, has known this from the first episode.
* Taken to absurdity in ''Series/ABitOfFryAndLaurie'', when they parody Australian soaps:
-->'''Fry:''' The truth is, mate, I was confused and slightly bewildered. I'd just discovered that Durnick isn't my real father.\\
'''Laurie:''' He isn't? Then who is?\\
'''Fry:''' I am.\\
'''Laurie:''' Then that must mean that you must be--\\
'''Fry:''' Exactly. Devlin's half-sister's wife's doctor's cousin's niece.\\
'''Laurie:''' Well then, who the hell am I?
* ''Series/{{Bones}}'' has this in one episode, where Bones discovers that the priest who has been helping them on a case is actually her long-lost father, who is also the murderer they are hunting for.
* ''Series/{{Carnivale}}'': Where to begin? The mysterious Henry Scudder is Ben's father. Lucius Belyakov (AKA Management) is the father of both Justin and Iris (who were born Alexei and Irina Belyakov). And Justin is Sofie's father, having raped her mother Appolonia as a young man.
* The spy Richard Series/{{Castle}} knows as Jackson Hunt tells him this in response to Castle asking him why he's so fixated on rescuing Alexis (because she's his granddaughter).
* In ''Series/ChinesePaladin'', DrunkenMaster Mo Yixi suspects from the beginning that he is Ah Nu's [[DisappearedDad long-gone father]], but due to a FamilyRelationshipSwitcheroo on the mother's part, has to investigate further before he's sure.
* In season 3 of ''Series/{{Chuck}}'', where Casey yells "I'm your father!" when Alex starts to run away after he has "kidnapped" her.
* ''Series/{{Continuum}}'': Subverted - Alec thinks Jason is his father when he experiences a flashback of Jason with his mother; he collects a DNA sample from him to see if they're genetic matches. When the results come back positive (99% match or so), Alec is now sure of his sneaking suspicion. However, this is a show involving time travel, so linear thinking is discouraged ... Simply, Jason is actually Alec's son from the future. So who's Alec father then? Why, Mr. Escher of Piron, of course.
* ''Series/LeCoeurASesRaisons'' ends with the revelation that Brett's, Brad's and Brenda's mother is not Crystale, but rather the maid, [[ButtMonkey Madge]].
* Parodied by the Melty Man (an AnthropomorphicPersonification of [[TheLoinsSleepTonight male impotence]], complete with black glove and [[Franchise/StarWars Darth Vader]] voice) in ''Series/{{Coupling}}''.
-->'''Patrick:''' You killed my erection!\\
'''Melty Man:''' No Patrick, I ''am'' your erection!
* Catherine Willows on Series/{{CSI}}, when she finds out that Sam Braun is her father.
* Parodied on ''Series/TheDailyShow''. Creator/StephenColbert is asked to report on the cancellation of daytime drama ''Another World''. He goes off on a wild melodramatic tangent, reveals that Colbert is not his real name and accuses Jon Stewart of abandoning his "bastard elevator baby". Subverted within the parody because when Stephen finally calls him "Daddy", Jon spoils it by pointing out that they're the same age.
* Beautifully done in season 3 of ''Series/TheDeadZone'' when Sarah finally tells JJ that Johnny is his biological father. JJ doesn't want to believe it and runs up to his room; Sarah and Walt follow. Johnny slowly, sadly heads to the door...and JJ reappears.
-->'''Walt''': John, JJ has a question to ask you.
-->'''JJ''': What am I supposed to call you?
-->'''Johnny''': (fighting tears and kneeling down to hug JJ) Johnny. You just call me Johnny.
* Done in very a surprising "How the hell did I not see that coming?" way on ''Series/{{Dexter}}'' when The Ice Truck Killer is revealed to be Dexter's brother.
* ''Series/DoctorWho'':
** Played straight in [[Recap/DoctorWhoS27E10TheDoctorDances "The Doctor Dances"]], when Nancy reveals that Jamie, the first of the gas mask zombies, was not her little brother as she had said earlier, but her son.
** Mocked in the third series when dealing with the Master, Martha asks if he is the Doctor's long-lost brother (an idea toyed with by previous producers). To which the Doctor responds, "[[YouWatchTooMuchX You've been watching too much TV.]]"
** Played straight in [[Recap/DoctorWhoS32E7AGoodManGoesToWar "A Good Man Goes to War"]], where River Song is revealed to be Melody Pond, Amy and Rory's daughter.
* ''Series/DowntonAbbey'' brings up the possibility briefly so as to deny it, when an OldFlame of the Dowager Duchess shows up in season 5.
-->'''Mary''': Granny has a past. Thank heavens Papa and Aunt Rosamund were already born or we could spin all sorts of fairy tales.
* One infamous ''Series/{{Eastenders}}'' moment (2001) is Zoe Slater telling her "sister" Kat: "You can't tell me what to do, [[YoureNotMyFather you ain't my mother]]," and getting in response, "YES I AM!"
* ''Series/TheFlash2014'': After Axel Walker, the second Trickster broke him out of prison, James Jesse reveals that the reason he had chosen Axel to be his successor is because they're father-and-son. Creator/MarkHamill, who played James Jesse in Series/TheFlash1990 reprised the role, and gobbled up the scenery as he delivered this marvelous ActorAllusion to his role as Luke Skywalker.
* ''Series/{{Friends}}''
** Monica has a crush on the replacement eye doctor. Only problem? He happens to be the son of her old flame Richard Burke.
** Used more dramatically when Phoebe (an orphan since her dad ran out years ago and her mom committed suicide) learns about her parents' friend Phoebe Abbott who was also her namesake. She pays the older Phoebe a visit hoping the latter knows where her DisappearedDad is. The older Phoebe admits that she doesn't know where he is, but is moved to reveal that she is Phoebe's (and by extension Phoebe's twin sister Ursula's) biological mother. The episode's ending shows that Ursula knew this all along (never bothering to tell Phoebe) since their supposed mother admitted it in the suicide note (which Ursula never showed Phoebe). Phoebe and Ursula don't have the best sibling relationship.
* ''Series/GameOfThrones'': Jaime admits to Myrcella he is her father, embracing her properly for the first time. She then almost immediately dies of poison.
* Played straight in ''Series/{{Glee}}''. It turns out that [[AscendedMeme Shelby Corcoran is Rachel's biological mother]].
* In ''{{Series/Glitch}}'', episode 4 reveals that Paddy is Beau's ancestor from about 150 years ago.
* The main plot of ''Series/{{Graduados}}''. Back in High School, in TheEighties, Loli was cheated by her boyfriend Pablo Catáneo, escaped with Andy Goddzer, and had [[AutoErotica sex in his truck]]. [[CantGetAwayWithNuthin She got pregnant]], but they all thought that it was with Pablo. Her father [[ShotgunWedding ordered them to get married]] to raise the kid, Martín. Then, in 2012, it was the time for a meeting of former students. Loli saw Andy again, remembered the whole thing, and arranged a DNATest: it got that Andy is the father of Martín.
* This happens on ''Series/GreenWing'', where Guy discovers that Joanna is his mother, making him and Martin brothers. Unfortunately, he only finds this out ''after'' they have sex, leading to a complete meltdown on Guy's part.
* In season 3 of ''Series/{{Haven}}'' it is revealed that the Colorado Kid was James, the son of Sarah, the woman Audrey was 54 years ago. 27 years ago he came to Haven to seek his biological mother and found out that she has not aged and thought of herself as Lucy Ripley. In the season 3 finale it is revealed that his biological father was actually Nathan, who had a fling with Sarah when he traveled back in time to the 1950s. It is also revealed that the Bolt Gun Killer, a skin changing serial killer, is actually Arla, James's wife from 27 years ago and thus Audrey's and Nathan's daughter-in-law.
* In the series ''Series/{{Heroes}}'':
** In Volume One, Claire Bennet is revealed to be the daughter of Nathan Petrelli and Meredith Gordon, both evolved humans. After a fire occurs in Meredith's home with 18-month old Claire inside, Claire's paternal grandparents, Angela and Arthur Petrelli, arrange her adoption with the Bennet family but they tell Nathan and Meredith that their infant daughter died in the fire.
** In the final scene of the pilot episode, Claire Bennet, a character who was introduced with evolved abilities, is shown to be the daughter of HRG (Noah Bennet), a character who captures evolved humans. Shortly after, it is revealed HRG and his wife, Sandra Bennet, are her adoptive parents, leading to the revelation of the above example.
** Subverted in Volume 3 where Arthur Petrelli convinces Sylar he is his son (and third brother with Peter and Nathan). Turns out this is a lie.
* Teased in ''Series/ItsAlwaysSunnyInPhiladelphia'' where it's been greatly hinted at (but never actually proved) that Frank is actually Charlie's father.
%%* Played straight in ''{{Series/Jekyll}}'', with an extra twist at the end of the final episode.
* In ''Series/JonathanCreek'', an actress attempts to covertly help the son that she secretly gave up for adoption many years ago by having him cast in the movie she is currently starring in, only to learn that he has developed a bit of an obsession with her, unaware that she is his mother. He's embittered when she rejects him in this sense, understandably a bit {{Squick}}ed out; unfortunately, she confesses this to her ex-husband who, holding his own grudge, manipulate the son into murdering her.
* Parodied on ''Series/KrodMandoonAndTheFlamingSwordOfFire''. Krod confronts Chancellor Dungalor, who stalls for time by revealing that he's Krod's ''brother''. Well, his ''brother-in-law'', as Dungalor was married to Krod's sister. Ex-brother-in-law, actually, as they're not even married anymore.
* The very last words said on ''Series/KyleXY'' by BigBad Cassidy to Kyle: "I'm your brother."
* Subverted in an episode of ''Series/LasVegas'' where Mike finds evidence that the Montecito's new owner, AJ Cooper, is Piper's father. Piper confronts Cooper and he vehemently denies it. It turns out that Cooper knew her father from when they served in the Marines together and promised that he would keep an eye on her.
%%* Strongly hinted in the ''Series/LawAndOrderCriminalIntent'' episode "End Game", and confirmed in "Frame".
* ''Series/{{Lawman}}'': In "The Joker", outlaw Barney Tremain claims to be Johnny [=McKay=]'s real father. It is left unresolved whether he was telling the truth or not.
* Also subverted in ''Series/{{Life On Mars|2006}}'', where DCI Morgan takes Sam to a graveyard. He shows Sam two graves which have the name Williams on them, telling him that these are his parents, he is not Sam Tyler, but Sam Williams, working for him undercover. Sam shrugs this off and is about to leave when he spots three graves behind him, one of which says 'Here lies Sam Tyler', the other two with his parents names, Vic and Ruth Tyler. He's a little upset by this..
* In US version of ''Series/{{Life On Mars|2008}}'', the trope is inverted: in the finale, Sam Tyler confronts his father, and tells him that he is his son.
* ''Series/{{Lost}}'': Claire and Jack are half-siblings. And it seems their father (or his ghost, or [[MindScrew SOMETHING like it]]) is close to the mysterious Jacob.
** In season 5, Pierre Chang, the guy from the orientation tapes, turns out to be Miles' father. "The third day we were here, I was in line at the cafeteria and my mother got in line behind me. That was my first clue."
* In ''Series/LukeCage'', episode "Blowin' Up the Spot", Diamondback is revealed to be Luke Cage's brother. The line is spoken fairly similarly to the ''Franchise/StarWars'' version, though the exact quote is, "Nigga, I am your brother."
* In 3x05 of ''Series/{{Merlin}}'', it is revealed that Morgana is actually Uther's biological daughter, making her Arthur's half-sister. One wouldn't be surprised because this follows the Arthurian legends, but since Morgana was first introduced as the King's ''Ward'' and the daughter of Goloris, one wouldn't be given the impression of anything otherwise.
* Parodied in an episode of ''Series/TheMightyBoosh'', "Journey to the Centre of the Punk": Howlin' Jimmy Jefferson, the Spirit of Jazz, claims to be Howard's father, then uncle, then second cousin twice-removed on his sister's side, in an attempt to keep Howard from killing him. Only the last one works.
-->'''Jimmy Jefferson:''' You can't kill me, boy!
-->'''Howard:''' Why!?
-->'''Jimmy Jefferson:''' Because I'm your father!
-->'''Howard:''' NOOOOOOOOOOOOOO-
-->'''Jimmy Jefferson:''' Yeeeaaah! Let it out! Let it out, boy! Release the pain! Daddy's here, come to daddy! Daddy's come for ya, boy!
-->'''Howard:''' -OOOOOOOOOO Hang on, my dad's a geography teacher in Leeds.
-->'''Jimmy Jefferson:''' ...I meant, uh, I'm your uncle!
-->'''Howard:''' NOOOOOOOOOOOOOO-
-->'''Jimmy Jefferson:''' All those hours spent weeping by the window, bring uncle back for me!
-->'''Howard:''' -OOOOOO...What, uncle Terry? Who works at Stansted?
-->'''Jimmy Jefferson:''' Oh, I meant, um, your 2nd cousin twice removed on your sister's side!
-->'''Howard:''' Oh right, yeah. NOOOOOOOOOOOO-
-->'''Jimmy Jefferson:''' That's right, we's family!
* In [[http://www.youtube.com/watch?v=ZK4e6HZ215Q&list=SL&feature=sh_e_top the first episode]] of what is considered possibly the worst TV series made, ''Series/MyMotherTheCar'', his mother has to admit to David Crabtree that while she's a car, she really is his mother, come back as a 1928 Porter. So, he's sitting in the car and she talks to him. At one point, (3:34 in the video referenced in this example), she says, "David, I am your mother."
* ''Series/TheMysticKnightsOfTirNaNog'': Maeve, the BigBad, reveals she is TheChosenOne Rohan's mother. There is no indication at what point she learned this; Maeve seemed as shocked as anyone when Lugad told her Rohan told him they were brothers. The line is almost identical to the movie's with the names changed appropriately.
* ''Series/NightAndDay'''s ostensibly parentless Josh Alexander turned out to be Steph [=McKenzie=]'s son, and then Alex Wells'.
* In the series ''Series/NightCourt'' it is revealed after several seasons that Harry's mentally unbalanced stepfather "Buddy" is actually his ''biological'' father.
* In ''Series/OnceUponATime'', it's revealed that Henry's biological father is Neal Cassidy, aka Baelfire, Rumpelstiltskin's long-lost son in the second season. Later on, in the third season, it's revealed that Rumpel's father is ''Peter Pan'', making him Henry's ''great-grandfather''.
* In the ''Series/OnlyFoolsAndHorses'' 1987 Christmas special "The Frog's Legacy", Del and Albert hinted that Freddie the Frog, a gentleman safecracker had an affair with Del and Rodney's mum Joannie before Rodney was born. This rumor was confirmed to be true in the 2003 Christmas special "Sleepless in Peckham", when Rodney looks at an old photograph of the 1960 Jolly Boys' Outing and finds that Freddie bears an uncanny resemblance to him.
** The {{Prequel}} trilogy ''Series/RockAndChips'' tells the story of Joannie's affair with Freddie in the early 1960's.
* ''Franchise/PowerRangers'' has been fond of this one and uses it regularly since it was so successful the first time around:
** In ''Power Rangers In Space'', we are treated to the tasty reveal that BigBad Astronema is TheCaptain Andros's long-lost sister Karone after brainwashing.
** Two years later in ''Power Rangers Lightspeed Rescue'', we are treated to the revelation that then-evil SixthRanger Ryan is MissionControl Captain Mitchell's long-lost son (And, thereby, Pink Ranger Dana's brother).
** In ''Power Rangers Ninja Storm'', we find out that BigBad Lothor is [[{{Mentors}} Sensei Watanabe's]] twin brother, and SixthRanger Cam's uncle. This was fortunate for Lothor's nieces by marriage, as they would have [[NeverSayDie been destroyed]] if Cam hadn't decided to save them--because "they're family."
** In ''Power Rangers Dino Thunder'', we have the revelation that SixthRanger Trent is the adopted son of BigBad Mesogog's human counterpart Anton Mercer.
** But the all-time leader is ''Power Rangers Mystic Force'', where we learn in short succession that the evil Wolf Knight Koragg is the mind-controlled form of Leanbow, husband to Udonna. Udonna then discovers that Red Ranger Nick is actually her long-lost son Bowen. Meanwhile, we discover that comic relief character Leelee is secretly the daughter of Necrolai, queen of the vampires.
*** This is invoqued a little differently in the original ''Mahô Sentai Magiranger'' serie. There is Wolzard, who has "killed" Miyuki Ozu, mother of the five heroes. But [[spoiler: in fact, he has transported her in a safe place. He revealed the truth to the heroes at the same time he sacrified him to defeat N'ma. But he still alive and come back to become Magi Fire Red along with the heroes and his wife, Magi Mother.]]
** Following ''In Space'''s example, ''RPM'' reveals that [[DarkActionGirl Dark Action]] RobotGirl Tenaya 7 is actally Dillon's missing sister, which surprises... ''[[TheUntwist absolutely no one]]''.
** Used again in ''PowerRangersDinoCharge'' when the Aqua ranger reveals to the Tyler, "It's ME. I'm your dad."
* The second-season finale of ''Series/ThePretender'': Miss Parker learns that she has a twin brother she was never told about because he supposedly died at birth -- and not only is he still alive, he's one of the recurring characters! (All four of the series' season finales feature a "He's the brother you never knew you had" [[TheReveal reveal]] for one of the lead characters -- counting the clone in the third season finale as a brother -- but this is the only one where the brother is an already-established character.)
* ''Series/PrincessReturningPearl'': Xiao Jian says a variation of this line to Xiao Yan Zi to reveal that he is her brother.
* Played straight in ''Series/{{Reaper}}'' with The Devil revealed to be Sam's father at the end of season one.
* In series 7 of ''Series/RedDwarf'' it is revealed that Lister's father is himself, and his mother is Kochanski, his long-lost love.
* In ''Series/RemingtonSteele'', Steele finds out in the last episode that Daniel Chalmers, his mentor and fellow con-man, is actually his long-lost father.
* In ''Series/{{Revenge}}'' Emily Thorne learns that the assassin- Gordon Murphy- responsible for the murder of her father ended up marrying her mother, Kara Clarke, making him her stepfather. [[spoiler: It still doesn't stop either of them from attempting to execute the other.]]
** Stevie Grayson, the ex-wife of Conrad Grayson and rival of Victoria Grayson, drops the bombshell in Season 3 that she is the biological mother of Jack Porter, Emily's childhood flame.
* ''Series/{{Sanctuary}}'': While the audience learns in episode 1 that John Druitt (AKA Jack the Ripper) is Ashley's father, she doesn't get the news until later in the season when he kidnaps her.
* ''Series/{{Scrubs}}'': Parodied in season 1 when the Janitor tries to spook J.D. by bringing up stuff from his personnel file, but J.D. sees right through it. When he then brings up one of J.D.'s childhood memories and J.D. asks how he could possibly know that, the Janitor mockingly claims to be his father.
* ''Series/{{Shadowhunters}}'':
** In the episode "The Descent Into Hell Isn't Easy" Clary finds out that her father didn't actually die and is actually Valentine Morgenstern. Nine episode later in "Blood Calls To Blood", Jace finds out his father "Michael Wayland" is actually Valentine as well, who was in disguise.
** Clary tries to invoke this with Luke while he's telling her about his past in "Of Men And Angels". He gives her a long look and reminds her that while he and Jocelyn were in love [[spoiler:while she was still married to Valentine]], they [[ChocolateBaby would have known]] if he was her father.
* In ''[[Series/{{Sharpe}} Sharpe's Justice]]'', the rabble-rouser Matt Truman is Sharpe's half-brother.
* [[TheParody Parodied]] in the ''Series/StargateSG1'' episode "200": the rest of the SG team momentarily trick Mitchell into believing that O'Neill is his father by means of TimeTravel.
* ''Series/StarTrekDeepSpaceNine'': It was hinted at throughout their character arcs, but nevertheless was a huge surprise when it was revealed that Enabran Tain and Elim Garak were father and son. However, Tain and Garak both knew it all along. The reveal was mainly for the audience who had not known it. The drama of the reveal is based on Tain wishing on his deathbed for Garak to avenge his death, while Garak wants - for [[WellDoneSonGuy once in his life]], and before it's too late - for them to have a moment as father and son, instead of a superior and inferior officer or a mentor and his protégé.
** It's also strongly hinted, but never acknowledged, that Tain's live-in-housekeeper is Garak's mother. She definitely raised him and at one point he implies she is the one person he ''knows'' genuinely cares for him.
* In a ''Series/ThirdRockFromTheSun'' two-parter, the Big Giant Head reveals that he is Dick's father. Tommy later likens this to Luke Skywalker finding out about Darth Vader, but Dick brushes him off, saying [[ThisIsReality this is real life]].
* ''Series/TheVampireDiaries'': Turns out that Uncle John is this to Elena.
** Subverted when ELENA confronts him with the reveal in order to get him to let her go.
* ''Series/VeronicaMars'':
** Subverted when paternity tests confirm that Keith Mars is indeed Veronica's father, not her mother's highschool sweetheart Jake Kane.
** And then played straight with Logan's adopted sister in an interesting way that somehow managed to avoid the usual cliché of the trope.
** Also played straight at the end of the second season episode "Green-Eyed Monster" with Wallace and Nathan.
* In the ''Series/WhiteCollar'' episode "Vested Interest", a DNA test reveals that mysterious informant Sam is actually Neal's DisappearedDad.
* Parodied innumerable times on ''Series/WhoseLineIsItAnyway''.
* Averted in ''Series/WithoutATrace'': Agent Malone is captured and tortured by a conwoman who thinks he's an enemy out to get her and her partner who is, naturally, her son. I can't recall all the facts, but in the end the conwoman dies and asks Malone not to tell her son the truth (it probably would've been squicky for him anyway).
* ''Series/TheXFiles'': Hints had been dropped throughout the series that Bill Mulder was not Mulder's father, but that his father was the Cigarette-Smoking Man. It was left up in the air until season seven's "The Sixth Extinction: Amor Fati", we find out that he ''is'' Mulder's father, but Mulder does not find out until much later.
** It's revealed in season 9 that he [[ReallyGetsAround also fathered Special Agent Jeffery Spender.]]
** [[FromBadToWorse It gets worse]] in season 11, when we find out that CSM is also [[spoiler: William's father]].

* In the song "The Mayor of Candor", the narrator is in love with the mayor's daughter, but the mayor won't hear of it. In the end we learn why:
-->''As I look into his leering aged wrinkled mirror of my own face''\\
''He laughs and sneers and says -- Of course dear son --''\\
''Where do you think you came from in the first place?''

* The {{Tragedy}} of Sohrab and Rostam from UsefulNotes/{{Persian myth|ology}}s, found in ''Literature/TheShahnameh''. Rostam's son is raised without meeting his father for years. The young Sohrab decides to become a hero and gathers up a force. Rostam is the Persian equivalent of [[Characters/ClassicalMythology Hercules]] and is meanwhile ordered to subdue the marauding enemies. In the final battle, the father and son engage each other in battle, as no one else is a match for either of them. Although Rostam notices similarities between himself and his enemy, it is not until it is too late when he discovers that he has killed his own son.
* The [[Myth/IrishMythology Irish mythological]] hero Cuchulainn accidentally kills his son, thinking he is an intruder, only to find out that his son is the victim when it's too late.
* OlderThanFeudalism: Oedipus, in ''Theatre/OedipusTheKing'', finding out that the woman he married is his biological mother, and that guy he killed years ago on the road was his biological father. Oh, and then he had to tell his daughters "I am your brother." ''Ouch''. He [[EyeScream puts out his eyes]] after that... [[Music/TomLehrer A tragic end to a loyal son who loved his mother.]]

[[folder:Professional Wrestling]]
* In the late 1990s, after Wrestling/TheUndertaker's brother, Wrestling/{{Kane}}, came to the WWF, it was revealed that Kane's biological father was Wrestling/PaulBearer, the Undertaker's manager until 1995. The story was Bearer worked in the funeral home run by Taker's parents (Bearer was a licensed mortician/funeral director in real life) and the mother made a pass at him, resulting in a one-night stand ... and Kane 9 months later.
* The 2005 feud between Wrestling/EddieGuerrero and Wrestling/ReyMysterioJr included an angle where Rey's real-life son Dominick was revealed to be the (kayfabe) biological son of Guerrero.
-->'''Guerrero:''' I'M YOUR ''PAPI!''
* WWE did a story line in 2007 where it was revealed that Vince had fathered a child out of wedlock years ago, and his illegitimate offspring was a member of the current WWE roster. In the end, the child was revealed to be [[spoiler: Hornswoggle]].
** Originally, it was planned for [[Wrestling/KenAnderson Mr. Kennedy]] to be Vince's long-lost son.
* During the 2016 ''[[Wrestling/RingOfHonor Road To Best In The World]]'' Dalton Castle was reminiscing about meeting Bobby Fish's children, to which Fish dropped the bombshell that he was Castle's father...[[{{troll}} he was lying.]]

* Two of the cultists in ''RolePlay/YuGiOhEastAcademy'' are revealed to be Denero's parents.

* Invoked in ''TabletopGame/{{Exalted}}'', where the Sidereal Exalted have a power, Brother and Sister Revelation, which allows them to ''invent'' any sort of blood relationship between two characters and make it metaphysically true.

* ''Theatre/{{Finale}}'' ends with Amy revealing that she is Sam's mother.
* Happens with the Baker and the Mysterious Man in ''Theatre/IntoTheWoods''.
* In the opera ''Lucrezia Borgia'', the title character turns out to be the mother of the protagonist, the young noble Gennaro, by a previous relationship.
* ''Theatre/TheMarriageOfFigaro'' has an instance of this that's similar to the one from ''Literature/TheItalian'' above: Marcellina is about to force Figaro to marry her in lieu of paying off a debt, when a casual comment he drops about a birthmark reveals that she's his mother. They embrace and make up, leading instantly to a classic NotWhatItLooksLike scenario...
** Something similar happens in ''Theatre/AFunnyThingHappenedOnTheWayToTheForum'', as the Centurion was intending to marry Hero's love interest. Turns out in the ending that not only was the blind man that Pseudolus attempted to distract by having him run across the hills of Rome seven times was his father, but the Centurion and the love interest were actually siblings (they were kidnapped and separated while they were very young, and it was presumably at a time that they simply had no way of remembering due to not knowing this until after he told them). This was more than enough to allow the Centurion to allow Hero to marry the love interest.
* In Molière's ''Theatre/TheMiser'' (1668) Anselme, the man who Harpagon wants his daughter to marry, ends up being the father of her lover Valère as well as Mariane, the love interest of both Harpagon and his son.
* Almost in ''Theatre/PokemonLive''. Giovanni used to date Ash's mom, and in the first draft of the show, TheReveal would be made that Giovanni ''was'' Ash's dad.
* ''Theatre/{{Urinetown}}'' milks the revelation that Penny Pennywise is [[TheIngenue Hope Cladwell's]] mother for all that it's worth.
* ''Theatre/{{Wicked}}'' has the Wizard realize that he's Elphaba's father. Elphaba herself never learns the connection -- probably all for the better.

* Spoofed in ''Mitch Benn's Crimes Against Music'' when, after a series-long RunningGag about Mitch's rivalry with fellow musical satirist Richard Stillgoe, the final episode features him as a special guest, and a showdown between the two performers.
-->'''Stillgoe:''' Punt and Dennis never told you what happened to your father.\\
'''Benn:''' You're not my father!\\
'''Stillgoe:''' No, of course I'm not. Whatever gave you that idea?

[[folder:Stand-up Comedy]]
* Comedian Gad Elmaleh parodied this in his stand-up show. His mother, he said, used to tell him that "your father is no Rothschild", i.e. "he's no millionaire, we can't waste money." He then says that he later met Rothschild, only to scream at him: "I know! You're not my father!"
* There's an old joke about a boy who figures out that he can get adults to give him stuff simply by saying a sly "I know the truth..." and leaving it at that, allowing their minds to jump to "What could he know?" and pay him off without confirming what it is he "knows". Then he tries this on the milkman, who, rather than paying him off, drops down in tears of joy and exclaims "SON!" as he hugs him.

[[folder:Video Games]]
* Subverted in ''VideoGame/MagicAndMayhem'' with a plot twist:
-->'''[[BigBad The Overlord]]:''' Your mother was Viviane, a woman I once loved. After your birth, she betrayed me. [[ShoutOut Cornelius, I am your father!]]\\
'''[[EccentricMentor Lucan]]: '''No, Merlin, [[FamilyRelationshipSwitcheroo Viviane betrayed you long before she bore Cornelius...]]\\
'''The Overlord:''' But... you cannot mean... [[BigNo NO!]]
* ''VideoGame/SuperMarioSunshine'': Bowser Jr. claims early on that Princess Peach is his mother. This is inverted after you defeat Bowser, when he tells Bowser Jr. that Peach is, rather, ''not'' his mother, and further subverted when Jr. in turn reveals that he knew she wasn't his mother.
* After the first ''VideoGame/ArtOfFighting'', Yuri Sakazaki revealed to her brother Ryo and his friend Robert Garcia that, the game's final boss, Mr. Karate, was Takauma Sakazaki, Ryo and Yuri's father. Good thing too, Ryo was about to kill him for thinking he was the BigBad. That honor belonged to Geese Howard who blackmailed Takuma by arranging for Yuri's kidnapping, so he could work for him.
** Used again in ''VideoGame/TheKingOfFighters'' where K's long lost sister is presumably Whip.
* Throughout the adventure game ''VideoGame/BadMojo'', there are hints that Eddie, the landlord of main character Roger Samms, is actually Roger's estranged father. In the game's [[MultipleEndings best ending]], if you manage to save both Roger and Eddie from the gas explosion that takes out Eddie's bar at the end of the game, this turns out to be the case.
* This trope is common in the ''VideoGame/TalesSeries'':
** In ''VideoGame/TalesOfDestiny'', Leon reveals that he's Rutee's brother and that Hugo's both of their father.
** In ''VideoGame/TalesOfDestiny2'' this comes up again. Judas is Leon Magnus, and thus is Kyle's uncle and Loni's uncle by adoption.
** In ''VideoGame/TalesOfEternia'', it's more of a "Luke, I am your mother": Meredy's mother, Shizel.
*** In the same game, after a prolonged sidequest, we find out the lonely painter Leticia sorting through her romantic issues is Max's missing wife.
** We find out near the end of ''VideoGame/TalesOfSymphonia'' that Kratos is Lloyd's father. It's hinted at.
** In the sequel, Marta is the daughter of Brute, leader of the Vanguard, an organization that's out to KILL her. Like Meredy, Marta is aware of this.
** ''VideoGame/TalesOfTheAbyss'' has this happen to Natalia - her real father is Largo the Black Lion, one of the God-Generals.
*** And ironically, in this case, the character named Luke technically [[spoiler: has no father. He's a clone]].
** ''VideoGame/TalesOfTheTempest'': [[NobleDemon Lukius]] is Caius's SeparatedAtBirth twin brother, and the Pope is his father.
* In ''VideoGame/ChronoCross'', it's revealed (in [[InfoDump a huge chunk of exposition]] that arrives immediately before the [[GiantSpaceFleaFromNowhere unexpected final boss]]) that Lynx, the cat-man who was the recurring villain for the first part of the game, and who you (kinda, sorta, it's complicated) killed two dungeons ago, was actually Serge's father Wazuki all [[BrainwashedAndCrazy brainwashed]] and [[BalefulPolymorph polymorphed]]. Also, Kid turns out to be Schala's daughter-clone-time duplicate, which adds an extra layer of weirdness to the final boss since Schala's [[FusionDance one half of it]]. And if his backstory [[WhatCouldHaveBeen hadn't been dropped]], masked magician Guile would have been revealed as Magus, Schala's brother and therefore Kid's... something. He might still be if the bonus ending in the DS version of ''Chrono Trigger'' is any indication.
* Exaggerated in ''VideoGame/LEGOStarWars 2'' when Darth Vader, PlayedForLaughs, pulls out a family photo of Padme and Anakin getting married.
* [[ParodiedTrope Parodied]] twice in ''VideoGame/KingdomOfLoathing'': the BigBad tells the player she is your mother (quoting, almost word for word, the rest of the exchange from ''Film/TheEmpireStrikesBack'', right to the BigNo)... then insults you for believing her. After you beat her, the Council that sent you to defeat her says "Say, did you know she was your mother?... nah, just kidding" as part of their congratulations message.
** More than twice, actually. When you kill enough soldiers for both sides in the war in the Mysterious Island quest, you get a choice adventure that lets you choose which boss of which side you get to fight, and the message you get has this. It's even lampshaded that it's been done to death!
* In the first ''VideoGame/FantasyZone'', the commander of the invading forces turns out to be Opa-Opa's father.
* The ''Franchise/FinalFantasy'' series uses this often:
** Also, in ''VideoGame/FinalFantasyII'', the Dark Knight in charge of much of Palamecia's military operations turns out to be Leon, the adoptive brother of Firion and Maria.
** In ''VideoGame/FinalFantasyIV'', BigBad Golbez turns out to be Cecil's {{Brainwashed}} brother, who is being controlled by TheManBehindTheMan from the ''moon''.
** In ''VideoGame/FinalFantasyVI'', it's implied that Shadow is the father of Relm. What's particularly amazing is that it's actually fairly subtle.
** In ''VideoGame/FinalFantasyVII'', it is revealed near the end of the game that Professor Hojo is the father of Sephiroth and injected him with Jenova Cells while he was still in the womb, though Sephiroth never discovers this. One could only wonder what his reaction would be, considering his low opinion of the man. Likewise, Cloud is led to believe he is a Sephiroth clone implanted with somebody else's memories. While this proves to be false, he instead discovers that he was injected with Jenova cells as an adult in a failed cloning attempt, making Cloud and Sephiroth some weird gene-splicing version of brothers.
** ''Crisis Core'' states that Cloud was implanted with 'S-cells' directly from Sephiroth's body. Cloud's powers were supposedly given to him by Sephiroth through this.
** In ''VideoGame/FinalFantasyVIII'', this trope is taken to an extreme, when discovered that ALL the PC's except Rinoa and Edea grew together at the same orphanage. The only reason why Edea is excluded was because she ran said orphanage. On top of that, numerous hints are dropped later on that the other star of the game, Laguna, is Squall's father.
** In ''VideoGame/FinalFantasyIX'', TheDragon Kuja is a "brother" of sorts of the main character Zidane -- they were both artificially created by the same man.
** Fairly early in ''VideoGame/FinalFantasyX'', Auron reveals to Tidus that ''Sin'' is really his father, Jecht, without any explanation for how the human Jecht became a giant SpaceWhale beyond "you know it to be true." The explanations don't come until much, much later. Why he expects him to ''believe'' this...
** Parodied in ''VideoGame/MobiusFinalFantasy''. Gilgamesh attempts to get Wol to be a better Warrior of Light by coming up with a 'beef' for them, and the best he can come up with is "I am your father".
-->'''Wol''': I put up with all of this utter nonsense and all I get is a lousy dad?
* Inverted in ''VideoGame/Jak3Wastelander'', where a fatally wounded Damas makes a final request for Jak to find his missing son. Jak realizes that Damas' son is his younger self, whom he sent back into the past in the previous game.
** [[https://www.youtube.com/watch?v=mmGegAIu1No A commercial for the game]] parodied this trope by having Daxter dramatically claim that ''he'' is Jak's father. The announcer at the end assures the viewers that the trilogy "won't end like this."
* ''VideoGame/MetalGearSolid'' did it quite embarrassingly straight -- at least to start with. After that it ran with it, taking it to its logical, [[CloningBlues truly disturbing]] conclusion.
** Big Boss is Snake's father -- Clone.
** Liquid is Snake's brother -- Twin.
** Solidus is not only Snake's brother, he's also Raiden's "father" -- Foster.
** While not part of the reveal, The Boss is Big Boss's "mother".
** Gene, BigBad of Portable Ops, is Big Boss's "Brother", raised as a successor to The Boss
** Ocelot is the son of The Boss and The Sorrow (confirmed by the [[AllThereInTheManual Database]]), as well as Big Boss' "brother".
** Otacon is the son of "Huey" and Strangelove, [[spoiler:though she considers him to be her and the Boss' child]].
** Colonel Campbell is Meryl's father.
** Grey Fox is also the "brother"/father figure of Naomi. He killed her parents and raised her. One could also say he's a further continuation of the twisted familial relationships. He's practically Gene's "Son". And after Gene's death, he becomes Big Boss's protégé to boot!
** Major Zero started Les Enfantes Terrible to replace Big Boss. Para-Medic did the actual cloning, and EVA is Solid and Liquid's surrogate mother.
* In the infamous [[GainaxEnding ending]] of ''VideoGame/MonkeyIsland2LeChucksRevenge'', [=LeChuck=] is revealed to be Guybrush's brother. Fans are divided over whether this ending is to be considered canonical, or [[AllJustADream a dream sequence]].
* ''Franchise/FireEmblem'':
** ''VideoGame/FireEmblemGaiden'': During the climax of Chapter 4, Alm and his army fight King Rudolf, ruler of the Kingdom of Rigel. With his dying breath, said king reveals that Alm is his son, and he ''wanted'' Alm to kill him as a part of an [[GambitRoulette elaborate scheme]] to free the continent Rigel is a part of from the two gods that truly rule it. Needless to say, Alm is miffed at this fact. To add to this, in a nice form of GameplayAndStoryIntegration, if you have Alm attack Rudolf, Rudolf will ''never'' attack him back.
** ''VideoGame/FireEmblemGenealogyOfTheHolyWar'': Julia is Seliph's half-sister. By extension, this makes [[BigBad Julius]] Seliph's half-brother.
** In addition to Julia and Julius, ''VideoGame/FireEmblemThracia776'' reveals that Arvis fathered a ''third'' child: Saias, a priest of Velthomer. His mother is Arvis' aide Aida, and supplementary materials note that he's the one who inherited Arvis' [[PlayingWithFire Major Fala]] blood (Julius has the dreaded [[DarkIsEvil Major Loptyr]] blood that stemmed from his parents being Minor carriers, while Julia has [[HolyHandGrenade Major Naga]] blood from her mother Deirdre). There's also Galzus, a mercenary whom we learn at the end of the game is the father of Leif and Nanna's childhood friend [[PluckyGirl Mareeta.]]
** ''VideoGame/FireEmblemTheBlazingBlade'': Nergal is the father of Ninian and Nils, Nino turns out to be Canas's niece, Dart is Rebecca's long-lost brother Dan, and Raven is actually Priscilla's brother Raymond.
** ''VideoGame/FireEmblemTheSacredStones'': Joshua is Ismaire's son. [[KingIncognito He knew this all along]], it's only TheReveal to the other characters and the player.
** ''VideoGame/FireEmblemRadiantDawn'': Micaiah is the sister of Empress Sanaki and Soren is the son of Almedha and Ashnard. Yes, the BigBad of the first game.
** ''VideoGame/FireEmblemAwakening'': Validar is [[PlayerCharacter The Avatar]]'s father. (Incidentally, Validar's name in the Japanese version is Fauder.)
** ''VideoGame/FireEmblemFates'': Zig-zagged with Corrin's parentage. It's revealed when he returns to Hoshido that he was actually taken as a baby by the one they presume is their father, meaning their real father is Sumaragi and real mother is Mikoto. Except then it turns out they and the Hoshidan royals are NotBloodSiblings, so Sumeragi isn't their father either. However Mikoto is still their real mother. In the end Corrin's actual biological father turns out to be Anankos, the game's true BigBad... but in a twist on the normal "the villain is the hero's father" trope, the reveal that he's Corrin's father comes with the reveal that he [[TragicVillain used to be good.]] And technically, Corrin's father isn't the villainous Anankos you fight in the story, but the LiteralSplitPersonality born of his good side.
* In ''VideoGame/SuperRobotWarsAlpha'' and ''VideoGame/SuperRobotWarsOriginalGeneration'' Levi Tolah, one of the invading aliens is actually Aya Kobayashi's BrainwashedAndCrazy sister, Mai Kobayashi.
** Since that wasn't crazy enough, in ''VideoGame/SuperRobotWarsOriginalGeneration 2'' it's revealed that neither are related because their "father" Dr. Kenzo Kobayashi {{brainwashed}} them into thinking they were his daughters when they were unrelated; their real past and identity are never revealed.
* Subverted in VideoGame/DragonFable 's Ash storyline. One of the necromancers tries to pull this.
---> '''Necro''' : ''"Ash, I am your father."''
---> '''Ash''' ''But my father lives on a farm west of Falconreach''
---> '''Necromancer:''' Dangit...thought you were one of those orphan heroes with a mysterious unexplained childhood.
* ''VideoGame/IWannaBeTheGuy'' pulls this out of nowhere with the FinalBoss, "The Guy" that you want to kill for his title being a huge version of the player character. Just to make sure you got it he says, "Yes, I ''did'' have sex with your mother." before the final phase of the battle.
-->"Check your inventory screen, Kid. You know it to be true."
* ''VideoGame/NoMoreHeroes'' tell the story of Travis Touchdown who became the best assassin in the US by a fictive association and that one of the responsible is in fact the wife of his brother that he didn't knew the existence before and that the number one assasin is in fact his half-sister who want to take a revenge on his father because he ran away from her mother.
** It's actually much more complicated than that. The character that's supposedly number one, Dark Star, claims to be Travis's father, but his half-sister Jeane shows up, kills Dark Star, and reminds him that his father is dead. After all, she's the one that killed him and Travis's mother. On top of this, Henry is not just his brother, but his long-lost twin, and a clip after the credits shows Henry's wife and Travis's main love interest, Sylvia, looking at a painting of the two battling with a young girl who she calls Jeane. Yep, just like Travis's half-sister. And his cat.
** The Dark Star example is a parody of this trope, as it turns out. Dark Star apparently tells all of his opponents things like that, [[ForTheEvulz just to mess with their head]] so they'll be an easier fight.
* The [[BlackKnight Darkshine Knight]] from ''VideoGame/SeikenDensetsu3'' has a backstory that is way too similar to Darth Vader's to be a coincidence. He was once a heroic knight who fought against the Dragon Emperor, only to lose and be converted into his [[TheDragon Dragon]]. Oh, and he's Duran's father.
* ''VideoGame/GodOfWar'': Zeus is revealed to be Kratos' father in a bonus cutscene in the first game and at the end of the second game.
* ''VideoGame/ViewtifulJoe'' does this quite blatantly when Captain Blue reveals himself to be Silvia's father, to the point of downright quoting Darth Vader. The entire game is one big homage to movies, so it fits.
** They did it again in the sequel where the BigBad was Jet Black, Joe's father and yet again the DS game double trouble where the BigBad was Joe's mother.
* Implied by ''VideoGame/{{Portal 2}}'', which confirms that Chell is the possibly adopted daughter of an Aperture Science employee, maybe even Caroline, the CEO's secretary/lover who was [[BrainUploading Turned Into]] SelfDemonstrating/GlaDOS. A BilingualBonus supports this, with the lyrics of the turrets song translating to something along the lines of ''"Goodbye, my sweet child. Stay away from science."''
* In ''VideoGame/{{Mother 3}}'', the [[TheDragon Masked Man]] turns out to be Lucas' twin brother, Claus, who had been kidnapped and brainwashed by BigBad Porky.
* The ''Franchise/{{Disgaea}}'' series. Nippon Ichi ''loves'' playing with this, and making them major plot points...
** It happens at least three times in the first game:
*** Mid-Boss is the reincarnated form of Laharl's father. This is hinted at in game, somewhat more strongly in the anime adaption of the game (even though it lacks the [[TheChessmaster "Seraph Lamington was behind everything"]] subplot, and confirmed by the ''World of Disgaea'' artbook.
*** The Big Sis Prinny is Laharl's mother, paying off the sin of suicide (that she did to save Laharl's life). The game does everything to tell you, short of actually telling you, and the anime preserves this plot point.
*** Jennifer was raised by General Carter. He makes a lousy father, though.
** As if they didn't beat this trope into the ground with the first game, they brought it back in the second game to beat it ''under the ground''.
*** Adell was given to Mom and Dad to raise by his real parents, Shura (the Masked Man) and Serion (the Masked Woman). Again, the game does everything to tell you, short of actually telling you.
*** Although the game makes clear that Rozalin, as Zenon's reincarnation, cannot be the daughter of the fake Zenon, and out right states that she was kidnapped. The game hints that Rozalin was born into the Snow Clan, and the fake Zenon's attack on them was to secure her. The second point is, once again, confirmed by the ''World of Disgaea'' artbook.
** With the third game, they don't bother even trying to take it seriously anymore...
*** In one scene, Laharl claims to be Mao's father. It doesn't work, mostly because Flonne and Etna can't decide who would be his mother.
*** And in Rasbperyl mode, [[{{Bishounen}} Master Big Star]] and [[ThoseWackyNazis Salvatore]] claim to be the [[GoldfishPoopGang Vato Brothers]]' parents, while two [[ButtMonkey Prinnies]] claim to be the parents of [[TheBigGuy Gold Knuckle]]. All of this, needless to say, is both impossible and absolutely ridiculous.
* ''VideoGame/{{Wild ARMs 4}}'' repeatedly drops the fact that main character Jude has no father, then has the party meet a mysterious vagrant with the same hair colour as Jude, only a little darker. Jude immediately feels strangely connected to this unknown man. Slightly subverted when it is hinted that this is ''not'' Jude's real father (he died), but rather a collection of nanomachines that mimicked him.
* At the end of ''VideoGame/BaldursGate'' (the first), we learn that the man who killed Gorion is Charname's brother.
** More literal example is the fact that the voice in your head belongs to Bhaal, God of Murder and your daddy. You'll have a LOT more of these revelations as the series goes on.
** For one more example, Imoen is one of the Bhaalspawn, and thus your half-sister.
* In ''VideoGame/JaysJourney'', Jay's father is Max, the team ditz, who was rendered as such when a magical spell misfired. Jay is less than pleased.
* In ''VideoGame/GoldenSun: The Lost Age'', Hama is revealed to be Ivan's sister.
** In the same game, one could also say that the Doom Dragon being a fusion of Felix and Jenna's parents and Isaac's father could count for this trope as well.
** And in ''[[VideoGame/GoldenSunDarkDawn Dark Dawn]]'', it's heavily, ''heavily'', "Camelot-does-not-do-subtlety" implied (but never actually stated) that Alex is Amiti's father.
* Parodied in ''VideoGame/GrabbedByTheGhoulies'', in which Baron Von Ghoul tells Cooper he can join him, and they can rule the mansion as father and son. After Cooper's reply, the Baron realizes he's gave the wrong speech.
* Near the end of ''VideoGame/InfiniteUndiscovery'', Iskan Du Bal reveals to Capell that Sigmund is his father. This was heavily implied by Svala explaining that after the newly born Capell was exiled from Casandra for being [[FantasticRacism born an Unblessed]], Sigmund, then-King of Casandra, had his Lunaglyph removed, thus reverting back to an infant.
* Semi spoofed in ''VideoGame/TheLegendOfDragoon''. Two of the characters are related (it's not hard to guess which two by Disc 2. It's even lampshaded by the older party "There may be a secret connection between us!". Apparently seems to be a spoof in honor of the ''VideoGame/FinalFantasyVIII'' father/son thing.
** Then it goes on to have an actual example. Emperor Diaz is Dart's father and Rose's former lover, Zieg. Then it's subverted -- it's actually Melbu Frahma in Zieg's body.
* In ''[[VideoGame/FirstEncounterAssaultRecon F.E.A.R.]]'', the Point Man is Alma's first son.
* ''VideoGame/RivalSchools: United by Fate'' reveals that TheHero Batsu is the son of ([[LargeAndInCharge literal]]) BigBad Raizo. In a surprising twist, Batsu also learns that his classmate Kyosuke and the ''[[ManBehindTheMan real]]'' BigBad Hyo are twin brothers ''and'' Batsu's cousins (their father Mugen is the older brother of Raizo).
* The Principal in ''VideoGame/BattleHigh 2'' is revealed to have changed his name to Frederick Regisworth, from Bryan Regis Harrisworth II. Considering that a character in both Battle High games is named Bryan Regis Harrisworth III, the outcome should be a no-brainer.
* Parodied in ''VideoGame/GiantsCitizenKabuto'' in Delphi's arc.
* Borderline example in ''VideoGame/ShadowTheHedgehog'': The titular character was created from the blood of the BigBad.
* In ''VideoGame/OverlordII'', the mysterious woman who foresees your inevitable downfall and secretly observes your progress is later revealed to be Rose, the previous Mistress and your mother. This is hinted at first with Gnarl noting how familiar she looks and revealed with this exchange:
-->'''Gnarl:''' Look, it's our old friend.\\
'''Rose:''' Oh, do shut up, Gnarl.\\
'''Gnarl:''' What! How did you know-- hang on, I recognize that voice now! Rose! Former Mistress Rose! Or Mrs. [[TheDragon Marius]] now, I should say. Don't trust her. She's a devious, manipulative, abandoner... Oh and she's your mother!
* A variation in ''Persona5'': [[spoiler:Goro Akechi, the young detective who turns out to be TheMole that betrayed the Phantom Thieves, reveals that he's the illegitimate son of Masayoshi Shido, a senator and the BigBad - in fact, he had known for a long time, and spent a large chunk of his adolescent life assisting him and [[SunkCostFallacy performing elaborate schemes]] in order to both boost his own ego and eventually cause Shido's downfall by revealing his heritage. As for Shido himself, he didn't know Goro was his son, but he ''did'' suspect it due to his [[UncannyFamilyResemblance resemblance]] to his mother. When you reveal that yes, he's the father, he states that he doesn't care. Ouch.]]
* ''Franchise/AceAttorney'':
** ''VisualNovel/ApolloJusticeAceAttorney'' takes this trope UpToEleven when it's revealed to the audience (but not to the protagonist) that Trucy is his half-sister, the guy who got killed in the first case was her father, and their mother is Lamiroir, the blind, amnisiac foreign singer from the third case. Whew....
** Oh, the third game was pretty good at this too: Evil serial killer Dahlia Hawthorne was coincidentally the cousin of Mia Fey, the lawyer who got her a death sentence, as well as the daughter of the culprit of 2-2. Dahlia Hawthorne is thus also the cousin of Maya Fey and the older sister of Pearl Fey. And so is Dahlia twin sister, Iris. The victim of the last case eventually turns out to have been Maya's long lost mother, who is also Pearl's (and Dahlia's and Iris's) aunt, Mystic Misty Fey, the master of Kurain. So there's no part of the Fey family that's not messed up.
** The madness that occurred in the 4th game [[ShipSinking sunk ship over ship over GODDAMN ship]], and it is unlikely they will ever be salvaged.
*** You [[BrotherSisterIncest underestimate the fandom.]]
** In ''Spirit of Justice'', it's revealed that Queen Ga'ran and Justice Minister Inga are not Rayfa's parents, but her aunt and uncle. Her real parents are the former Queen Amara and leader of LaResistance Dhurke Sahdmadhi, which also makes her Prosecutor Nahyuta Sahdmadhi's sister and Apollo's foster sister.
* ''[=Indestructo2Tank=]'''s Adventure Mode. After Dirk Danger defeats General Betton, Betton tells Dirk that he's Dirk's father.
* In the Troperiffic fantasy game parody ''VideoGame/DarkenedSkye'', when Skye finally meets her long-lost mother, she finds her to be extremely bitter towards Skye's father and distrustful of men in general. The reason for this attitude is revealed in the game's penultimate battle, where Skye's father is revealed to be TheDragon to the BigBad. With 3 heads to boot.
* In ''VideoGame/BatenKaitos'', you find out at one point that Giacomo is Georg's son. However, since you find out even later that Kalas is an ArtificialHuman and therefore has no biological parents, this doesn't mean what you think it means.
* A popular ''VideoGame/TeamFortress2'' theory is the idea that the Spy is the Scout's father. In "Meet the Spy," the BLU Spy reveals that the RED Spy has been sleeping with the BLU Scout's mother. A drawing of the Scout's mother is engraved on the barrel of the Spy's unlockable handgun, the Ambassador. And one achievement for the Spy, "Who's Your Daddy," involves headshotting three Scouts with the Ambassador, the gun on which his mother is engraved.
** ''[[Webcomic/TeamFortress2 Team Fortress Comics]]'' looks further into this: The Scout has a "nightmare" about the Spy being his father in the third issue, and the fourth issue hints at the theory being true with a WhamLine:
---> '''Heavy''' ''(responding to Scout's statement about his DisappearedDad)'' Yes. [[spoiler:Your father disappears often.]]
** Issue 6 [[http://www.teamfortress.com/tf06_thenakedandthedead/#f=164 finally confirms this]]...in a very... [[Music/TomJones interesting way]]...
* In ''VideoGame/LuminousArc2'', Master Mattias is Roland's father. He asked Steven to looked after his young son many years ago before going on his NecessaryEvil path. Partly played with in that Master Mattias didn't even know until Steven told him.
* In ''VideoGame/{{Xenogears}}'', it's revealed that Grahf is actually Fei's father Khan, as well as Wiseman, a mysterious masked man who has shown up to give Fei advice on several occasions. To further complicate matters, the true essence of Grahf is actually a previous incarnation of Fei, named Lacan, who learned to transfer his mind from one body to another, essentially becoming immortal.
** Party character and android, Emeralda was created by another previous incarnation of Fei, a scientist named Kim. Essentially making Fei Emeralda's father.
** Even better; Fei's mother turns out to be Miang, due to her being TheVirus.
* Parodied in ''VideoGame/RatchetAndClank Future: A Crack in Time''. After you beat the game, [[TheDragon Lord Vorselon]] will show up and claim "Rachet, ''I'' was... your father's accountant!"
* ''VideoGame/BlazBlueCalamityTrigger'': Jin is Ragna's brother, not just some psycho using UsefulNotes/JapaneseSiblingTerminology. Nu, and therefore Noel are clones of their Missing Little Sister, Saya.
** ''VideoGame/BlazBlueContinuumShift'': Lambda is another clone of Saya. The Imperator of the [[TheEmpire Novus Orvus Librarium]] is Saya herself.
* In ''[[VideoGame/CastlevaniaChroniclesOfSorrow Castlevania: Dawn of Sorrow]]'' we find out Arikado is really Alucard, which means Alucard is protecting his father's reincarnated soul.
* ''VideoGame/DoubleSwitch'': Lyle the Handyman is Eddie's father, and Elizabeth, the apartment manager, is Eddie's mother. All three of them know this, but the player and the other characters did not know about that.
* In ''VideoGame/{{Bayonetta}}'', Father Balder reveals that he is the titular character's father towards the end of the game. In the [[Videogame/{{Bayonetta 2}} sequel]], the Masked Lumen is revealed to be a younger version of Balder, which is also another variation of this.
* In ''VideoGame/SecretOfMana'', the hero character's mother is the Mana Tree and his father is the ghost you meet at the beginning of the game who tells you to take the Mana Sword.
* In ''Videogame/DawnOfMana'', it's eventually revealed that Keldric, the protagonist, and Stroud, the antagonist, [[spoiler:are brothers]].
* Inverted in the main campaign of ''VideoGame/BattleForWesnoth'': TheReveal is that prince Konrad isn't actually related to the King at all.
* In ''VideoGame/NeverwinterNights2'' Shandra learns her father is actually Ammon Jerro. Eventually you will have both PC's in your party (but not at the same time) and figure out their relationship.
* ''Videogame/TheElderScrollsIVOblivion''. You find out early that Martin is the last of the Septims and must ascend the throne to save the world. To Martin it's all quite a shock and you must do a little work to convince him.
* In ''VideoGame/OdinSphere'', the oracle dragon Hindel tells Oswald the Shadow Knight (who is about to slay him) that his father was a man named Edgar. Oswald dismisses this claiming that he doesn't care to know the name of the man who abandoned him as a baby. Hindel tells him not to forget it anyway. To get the True Ending, Oswald must be the one who fights the undead Darkova Gallon the former king of Titania. When Oswald strikes the killing blow, Gallon reacts with disbelief since a prophecy stated that he would only be slain by one of Titanian royal blood. Gallon then asks Oswald his father's name. Oswald recalls Hindel's last words and tells Gallon that his father was named Edgar. Gallon then reveals that Edgar was his eldest son whom he had assassinated out of fear that he was his prophecized killer. As Gallon dies for good, Oswald muses on this new information and realizes that his parents didn't abandon him but sent him away to the Fairy Kingdom for his own safety. While Titania slowly sinks into the sea, Oswald takes one last look at the homeland he never knew.
* In ''Videogame/MassEffect3'' Matriarch Aethyta reveals that she's the genetic father of Liara, which was hinted in the Shadow Broker DLC of the previous game. If told about this, Liara states that she figured it out a while ago since she's now the [[InformationBroker Shadow Broker]].
* ''Franchise/DeadOrAlive'': The intro video of ''Dead or Alive Xtreme'' features Ayame revealing to Ayane that Ayane is her ChildByRape.
* In the ending of ''VideoGame/{{Gex}}: Enter the Gecko'', BigBad Rez claimed to be Gex's Father.
* The player character in ''VideoGame/BioShock'' receives a one-two [[PlayerPunch punch]] of discovering that his biological father is Andrew Ryan ''and'' that Dr. Tennenbaum, Frank Fontaine, and Dr. Suchong were his surrogate parents. Ryan himself only figured this out about an hour earlier.
* ''VideoGame/ElementalMaster'': In the opening cutscene, TheHero finds out that the BigBad Gyra is also his brother Roki.
* Inverted in ''VideoGame/Fallout4'': [[spoiler:the Institute's mysterious elderly leader known only as "Father" is actually the Player's son Shaun, who is older than the HumanPopsicle player thanks to taking TheSlowPath after being stolen from Vault 111 as a baby sixty years ago.]]
* In ''VideoGame/HometownStory'', Midori, the travelling merchant who settles in the village around the time Shinji arrives, is actually his biological mother who gave him up as a child. The reveal occurs late in Shinji's storyline.
* ''Oden Cart: A Heartwarming Tale'': That 21-year-old Nice Girl who [[TrademarkFavoriteFood loves oden]]? She's the cart owner's long-lost daughter, as revealed in her ending.

[[folder:Web Animation]]
* In the third [[WebAnimation/TheLazerCollection Lazer Collection]] video, we find out that the detective hero is the son of Doctor Octagonapus.
* In Proxicide's ''MK vs. SF 3'', it is revealed at the very end that Akuma and Ryu are father and son.
** This deviates from ''StreetFighter'' canon a bit -- in canon, Gouki is Gouken's younger brother and Ryu's adoptive uncle.
* The Most In The Graveyard toon on ''WebAnimation/HomestarRunner'' reveals that Coach Z's aunt is Bubs's uncle, which makes them sixth fourth second fifth cousins thrice removed, according to Bubs.
* ''WebAnimation/BrokenSaints'': More like I Am ''Her'' Father''. BigBad Lear Dunham tells the other heroes that he is Shandala's biological father in his JustBetweenYouAndMe.
* In ''WebAnimation/FTLKestrelAdventures'' [[spoiler: General "Blackbird" Sandoval is Jose and Ricardo's mother.]]
* ''WebVideo/UltraFastPony'' uses this as a punchline. It comes out of nowhere and doesn't get followed up on until the next season.
-->'''Twilight:''' Spike, I don't want you hanging around with Rarity any more.\\
'''Spike:''' You're not my mom.\\
'''Twilight:''' What are you talking about? Of course I am.\\
'''Spike:''' Really?\\
'''Twilight:''' Yes, Spike, it is true.
:::For those unfamiliar with the characters, Twilight is a ''pony'' and Spike is a ''dragon''. Later events suggest that Twilight is just delusional about the relationship, and that it's part of a very odd MyBelovedSmother complex.
* Parodied in ''WebAnimation/XRayAndVav'' when it looks like X-Ray is about to be killed by the Corpirate and he laments that he's about to die a virgin and without knowing who his father is.
--> '''Corpirate''': What if I told ye... ''I'' be ye father?
--> '''X-Ray''': ''(instantly brightening)'' Really? Papa?
--> '''Corpirate''': Of course not ye fool!

[[folder:Web Comics]]
* Parodied in [[http://www.penny-arcade.com/comic/2009/1/21/ this]] ''Webcomic/PennyArcade'' strip.
* ''Webcomic/GirlGenius'': At the end of the first major arc, Agatha escapes from Baron Wulfenbach with the newfound knowledge that she is the daughter of famous adventurer Bill Heterodyne.
** In the next arc, she finds out that her mother Lucrezia was almost certainly the infamous menace known as the Other... shortly before getting a copy of said progenitor's persona [[EnemyWithin uploaded into her mind]].
** Gilgamesh Wulfenbach, the Baron's son, may also be the son of a woman from the lost city of Skifander. This may or may not be related to reports that a princess of Skifander is in Baron Wulfenbach's domains and according to the Baron wants Gil dead. Said princess may be the Baron's daughter and thus Gil's sister (probably twins).
* ''Webcomic/{{Earthsong}}'': Willow learns that She's is Earthsong's "Eve" - the first example and eventual mother of the native race of Earthsong's planet.
* ''Webcomic/OzyAndMillie'': Millie eventually learns that the dread pirate Locke is her father, even though MerlinSickness makes him look like he's about her age.
* A variation in ''Webcomic/TheInexplicableAdventuresOfBob'', when Bob [[http://bobadventures.comicgenesis.com/d/20061007.html first tells Molly]] that he ''considers'' her to be his daughter, even though they are not related.
** Still later, Jean [[http://bobadventures.comicgenesis.com/d/20080503.html reveals that]] because Molly shares some of her DNA, Jean ''is'' her mommy, "just a little bit."
* Revolver Ocelot tells this to Psycho Mantis at one point in ''Webcomic/TheLastDaysOfFoxhound''. Mantis, [[SelfMadeOrphan having killed his father at the age of eight]], states that he isn't. Ocelot concedes the point since the only reason he said it was to rip up in Mantis' old wounds.
* In ''Webcomic/{{Drowtales}}'', Ariel understandably starts to become wary of this trope after one time too many.
** First [[http://www.drowtales.com/~wiki/index.php/Jer%27kol_Sarghress Jer'Kol]] [[http://www.drowtales.com/mainarchive.php?check=1&order=chapters&overview=1&chibi=1&cover=1&page=1&extra=1&id=311 tells]] [[http://www.drowtales.com/~wiki/index.php/Ariel_Val%27Sarghress her]] he is her father, but it turns out he is really an assassin sent to kill her!
** Ariel's revelation to the identity of her ''actual'' father, Zhor, apparently occurred off-screen but seems to have been taken much better.
** Mel is really Ariel's mother, a fact that she has trouble accepting thanks to the aforementioned Jer'kol, and in the same line ''Kalki'' is really Mel's daughter.
* ''Webcomic/QuestionableContent'' references it in [[http://questionablecontent.net/view.php?comic=436 this strip]].
* In ''Webcomic/LookingForGroup'', when Richard is in the demonic court on the Plane of Suck, he is asked why he travels with Cale. He responds with a mumbled "He's my mother." This gets a "What?" reaction from everyone in the room, including Richard. Probably just a joke, though. But they said that about the rabbit, too, so...
** Played straight in [[http://www.lfgcomic.com/page/674/ page 674]] where Captain Tah'vraay reveals this to Benny to get her to break the magical block that keeps her from using healing spells.
* Subverted in the ''Webcomic/DanAndMabsFurryAdventures'' side-comic ''Abel's Story'', in which Abel grows up believing Cid Rewanz is his father, when in fact Cid was killed and replaced with the Incubus Aniz years before Abel was born.
* ''Webcomic/DarthsAndDroids'': Repeatedly.
** First with Owen Lars: [[http://www.darthsanddroids.net/episodes/0302.html "Anakin, I am your stepfather."]]
** Later with ''Dooku'': [[http://www.darthsanddroids.net/episodes/0455.html "No! Wait! Anakin, Ah am your f--]]. In the latter case, however, he may have been about to say "friend."
** Darth Vader gets to do it too. On ''[[http://www.darthsanddroids.net/episodes/0772.html Leia]]''.
** And of course, Luke does it to Vader: [[http://www.darthsanddroids.net/episodes/1151.html "No,]] '''[[http://www.darthsanddroids.net/episodes/1151.html I]]''' [[http://www.darthsanddroids.net/episodes/1151.html am your son."]] [[http://www.darthsanddroids.net/episodes/1152.html But then...]]] [[spoiler:"No, Luke, I am your '''mother'''."]]
* In ''Webcomic/TheOrderOfTheStick'':
** General Tarquin, covert EvilOverlord and aspiring ArchnemesisDad, {{invoke|dTrope}}s and {{lampshade|Hanging}}s this trope when [[http://www.giantitp.com/comics/oots0723.html revealing his identity]] to [[spoiler:his son, Elan]]; he kept their relationship secret and wore TinTyrant armour to build the dramatic tension, though the reveal is [[http://www.giantitp.com/comics/oots0050.html foreshadowed]] much earlier.
** The [[OurAngelsAreDifferent celestial]] judge summoned into Azure City to preside over the Order's trial turns out to be [[spoiler: Roy's father, who had magically disguised himself and hijacked the summoning spell]].
* The ''Webcomic/{{Mulberry}}'' story "Mul/Kerry/Bush" included a scene where UsefulNotes/GeorgeWBush tried to escape Mulberry's experiment by claiming he was her father. Since Mulberry has InvisibleParents, she nearly believed him, until [[DumbassHasAPoint Taffy pointed out that her last name isn't "Bush."]]
* A variation in ''Webcomic/TheWhiteboard'': Jinx's friend Kasi turned out to have been Howie's stepdaughter. Both of them knew, but it was certainly unexpected for the readers.
* In ''Webcomic/GastroPhobia'', Philia reveals that she is Phobia's [[KidFromTheFuture daughter from the future]].
* In ''Webcomic/ScandinaviaAndTheWorld'', colonies and independent micro-nations are portrayed as the children of the countries that "own" them.
* Being the offspring of Satan and Lilith is quite a shock to Lazarus in ''Webcomic/{{Underling}}''.
* In ''Webcomic/TheSilverEye'', Enel had been denying that Velvare Bamidele was his father for years. Finally, after years of silence on the matter, Velvare admitted that he is his son after all.
* In the furry adult comic, ''[[http://www.theduckwebcomics.com/Tinas_Story/5416521/ Tina's Story]]'', Tina is told that the man she thought was her stepfather was actually her biological father. Tina's mother was underage when she became pregnant, so they made up about her being raped by a human to cover it up. Stan (the dad) confessed to Tina because she was getting married to a human, and he didn't want to take the chance that Georgette's grudge against humans (over the years [[BelievingTheirOwnLies she'd taken to heart that humans had hurt her]]) would taint her marriage.
* Being a ''Franchise/StarWars'' parody, of course ''Webcomic/BlueMilkSpecial'' covered this:
-->'''Vader:''' Yep. I ''got it on with your mom''. You know it to be true.

[[folder:Web Original]]
* In "[[WebVideo/TheAngryVideoGameNerd AVGN]] vs [[WebVideo/TheNostalgiaCritic NC]]", the Nostalgia Critic tries pulling this on the Nerd. It fails.
-->'''NC:''' Wait! Wait! Would you let your brother die?\\
'''AVGN:''' Brother? You're my brother?\\
'''NC:''' Uh, yes! I am your brother!\\
'''AVGN:''' Well then, surely you know the name of our mother.\\
'''NC:''' Well of course I know the name of our mother! Eliza... be... ''(Nerd points Super Scope at Critic)'' Oh, blame a guy for trying!
* In the Literature/LegionOfNetHeroes title ''Dvandom Force'', .Sig Lad is revealed to have been the son of Mr. Thingy and the !Visible Woman of the Net.tastic Nine, who was dosed with an unstable form of the Super-Molder Serum, and who managed to escape the {{Retcon}} Limbo where the rest of the Nine had been sent through the Dvandom Dial.... No, seriously.
* Parodied, once again, in ''WebVideo/CollegeSaga''. The DarthVaderClone Diculous tries to pull this on the hero, only to have two of the party members inform him that "*We* are your parents!". Perhaps the reason the hero doesn't fall for it is that he was already revealed to be the son of Willie Wonka. The final twist is Diculous is their ''daughter''.
* Seen in the Literature/WhateleyUniverse with Carmilla (Sara Waite). Not only does her father turn out to be the very demon a bunch of occultist wannabes are trying to sacrifice her to, but the first time she faces down the infamous archvillain known as the Necromancer she finds out that he in turn is her ''uncle!!''
* Inverted in ''Battle for Milkquarious''. Near the end, it is revealed that the villain is White Gold's son.
* ''[[Film/{{Sockbaby}} Sockb4by]]'' - Doug Jones, to Ronnie Cordova.
* In ''Machinima/RedVsBlue'' the trope is played with in season 1. Sarge, after being shot in the head, talks to Church as a ghost.Sarge laments that he never got to tell Grif the he was his son. The following conversation is something along the lines of:
-->'''Church''': That orange guy is your son?
-->'''Sarge''': Nope. I just wanted to screw with him one last time.
** The Freelancer Saga (season 9-10) combines this with TheReveal -- the characters involved already know of the connection, but the audience is kept completely in the dark until the very last episode.
** Season 14 has a humorous example of this in the crossover with WebAnimation/DeathBattle [[spoiler: when it turns out that [[DrillSergeantNasty Sarge]] is [[HotBlooded Boomstick's]] long-lost father.]]
* Rule 72. Darth Vader is Everyones father. NO EXCEPTIONS!
* ''Roleplay/TheGunganCouncil'' has Darth Apparatus doing this to both Ryori Holloway and Delilah Nepenthe.
* Appears to be parodied in the original audio story [[https://bluetowel.wordpress.com/audio-drama/true-blues-retold/ True Blues Retold]] when the Corn Man throws out the classic line to Frank. It turns out, though, that the villain was deliberately using the famous movie line as an attempt to distract Frank, who was at that moment threatening him with a pipe. It worked, since Frank, a simple farm boy, had never seen ''The Empire Strikes Back''.

[[folder:Western Animation]]
* Played with in ''WesternAnimation/AdventuresOfTheGalaxyRangers'': [[CorruptBureaucrat Wheiner]] attempts to blackmail Walsh by threatening to reveal that Shane is Walsh's biological son. Shane never discovers this fact.
* ''WesternAnimation/AvatarTheLastAirbender'': In "The Avatar and the Fire Lord", it is revealed that Avatar Roku, Aang's spiritual predecessor, was the great-grandfather of Prince Zuko on his mother's side, making Aang Zuko's great-grandfather in spirit, if not in body. Did we mention that Mark Hamill voices ''Zuko's'' father? Cue run-in-the-family memes.
** Zuko crosses paths with this trope ''again'' in the series' follow-up comic book ''[[Comicbook/AvatarTheLastAirbenderTheSearch The Search]]'' when he's given reason to hope that his father is not actually Ozai but Ikem, the man his mother truly loved. [[YankTheDogsChain His mother reconfirms]] [[SubvertedTrope that he's still Ozai's son.]]
** Naturally, SequelSeries ''WesternAnimation/TheLegendOfKorra'' revealed towards the end of the first season that Tarrlok and the season BigBad Amon are brothers. By that point, many FanFic writers had the right to exclaim, "Wait, IWasJustJoking!"
* [[TheParody Parodied]] on ''WesternAnimation/TheBrakShow'' episode "All That I Desire You", itself a [[WholePlotReference complete send-up of soap operas]]; Dad is revealed to be living a double life as billionaire oil baron Drake Gainway, and is father to Zorak, Clarence, and his secret third wife Cynthia - in addition to Brak and the Gainway children.
** And just for extra craziness, when ''The Brak Show'' was "hosting" Creator/AdultSwim's New Year's Night, it was revealed that Thunderclese's father was none other than Frylock from ''WesternAnimation/AquaTeenHungerForce'', ''a completely different show''.
* Evil Emperor Zurg pulled this during a climactic fight scene with the title character in an episode of ''WesternAnimation/BuzzLightyearOfStarCommand''. Quite possibly to give a ShoutOut to ''WesternAnimation/ToyStory2'' (''Buzz Lightyear of Star Command'' is a ShowWithinAShow that got [[{{Defictionalized}} turned into a show]]. It gets a little headscratch-ey, but the above mention is canon because of this show, which is the derivative work and... yeah, just yeah.) On the other hand, Zurg was implied to have been fooling around, as he then strikes a stunned Buzz and states "Psyche! Made ya look!"
* In ''WesternAnimation/{{Chaotic}}'', the card game revealed something more of a "I am ''also'' your founder" with Kiru, the greatest Overworld hero (even got a beautiful city named after him)and the ancestor to Chaor, currently one of the Overworld's greatest enemies.
* ''WesternAnimation/CodeLyoko'': It is revealed just before the Season 2 finale that Franz Hopper, creator of Lyoko, is actually [[TheChick Aelita's]] father. This also reveals that she is human, and not an A.I. as everyone originally thought.
* ''WesternAnimation/CodenameKidsNextDoor'': Number 1 learns in TheMovie that the BigBad Father is his uncle. [[InvertedTrope Inverted]] in the same movie with the Delightful Children, who it's revealed aren't actually Father's children but former KND operatives whom he kidnapped and {{Brainwashed}}.
** Also, kind of inverted in that Numbuh Zero, who we haven't seen before, is Nigel's dad, who we have.
* Parodied in ''WesternAnimation/DextersLaboratory'' when [[SeriousBusiness Dexter's dad was making a big deal over not being allowed to get Mom's]] [[DoubleEntendre muffins.]]:
-->'''Dad:''' Dexter, son, could you come here for a moment? I'd like to have a little word with you.\\
'''Dexter:''' And just what do you want?\\
'''Dad:''' ''(coming out of the shadows)'' Dexter, [[CaptainObvious I... am your father.]]\\
'''Dexter:''' (gasp) That is not possible! Oh, wait, no, you're right.\\
And Also:
-->'''Dad:''' Join me, Dexter. Join the muffin side!
* Parodied in ''WesternAnimation/TheFairlyOddParents'' in a "copyright-infringing dream sequence":
-->'''Timmy:''' Hey! You cut off my hand! I've only got two of those!\\
'''Darth Vader-like:''' Don't worry, you get a new one. A really cool robot one!\\
'''Timmy:''' How do you know all this?\\
'''Darth Vader-like:''' Because, Timmy, I am your father. ''(removes mask to reveal himself as Cosmo)''\\
'''Cosmo:''' Your godfather!
** A brilliant ContinuityNod to the quote starting the Fairy Odd Parents section here.
* Parodied in ''WesternAnimation/{{Freakazoid}}'', in the episode "The Wrath of Guitierrez". During the climax of the episode, Guitierrez is knocked off a platform and hangs dangling over an abyss, and cries for Freakazoid to pull him up.
-->'''Guitierrez:''' Freakazoid, help me! Would you let your father fall?\\
'''Freakazoid:''' My father? You're my father?!\\
'''Guitierrez:''' ''(glances confused at camera)'' O-oh yes. I am your father!\\
'''Freakazoid:''' ''(goes to help him, stops)'' W-who was my mother?\\
'''Guitierrez:''' Uhh... Faye Dunaway?\\
'''Freakazoid:''' ''(crosses arms)'' No she's not...\\
'''Guitierrez:''' Kaye Ballard?\\
'''Freakazoid:''' Kaye--nooo.\\
'''Guitierrez:''' [[Series/GetSmart Would you believe Sandy Duncan?]]
* Happens in the ''WesternAnimation/{{Futurama}}'' DVD movie ''Bender's Game'', the parties being Farnsworth and Igner, the stupidest of Mom's three sons.
** And an... odd version later: Hermes was the one that approved Bender in the production line (even though he shouldn't have been), making him, in a bizarre sense, Bender's father.
** This
-->'''Leela:''' They killed my parents! ''(Leela is with two cloaked figures when Fry appears)''\\
'''Fry:''' Close ''(pulls down the hoods to reveal they're both purple-haired cyclopes)''\\
'''Leela:''' They... are my parents.
* ''WesternAnimation/{{Gargoyles}}'' had a unique example of this. Since the eponymous creatures in the main cast are part of an egg-laying species whose members are raised collectively by their home clans (and, thus, do not have any concept of individual parenthood), [[Creator/GregWeisman the show's creator]] eventually had to directly reveal which characters were the biological offspring of which, as it's never actually stated in-universe for many of them. Specifically, Hudson is Broadway's father, and Othello/Coldstone is Gabriel's father.
* ''WesternAnimation/GravityFalls'' has a downplayed variant. You know the author of the Journals? The ones that Dipper's been obsessing over all summer, and trying desperately to figure out who wrote them? Turns out [[spoiler: he's Grunkle Stan's twin brother, and therefore Dipper's great uncle.]] Of course, Dipper's thrilled about this, since the Author's his hero, so instead of a BigNo, it's more of a squeal of joy.
* ''WesternAnimation/HeManAndTheMastersOfTheUniverse1983'': In "Teela's Quest", the titular character finds out that she's the daughter of the Sorceress. Her mommy gave her EasyAmnesia, though, since Teela was NOT supposed to find out. This would've been true in [[WesternAnimation/HeManAndTheMastersOfTheUniverse2002 the 2002 remake]], but without the amnesia, had the show continued. Oh, we would've also learned that Fisto was Teela's biological father. For some reason, a couple of episodes seemed to hint that it was Duncan a.k.a. Man-At-Arms (who happens to be Fisto's brother and Teela's adoptive father) instead.
** Some time after the end of the original animated series, the minicomic ''The Search for Keldor'' dropped hints that Skeletor is really King Randor's long-lost brother Keldor, making him Adam/He-Man's uncle. In the 2002 remake, Skeletor was originally named Keldor, but there is no indication that he is related to Randor.
*** While never stated in the show, the writers have since revealed that Keldor was intended to be Randor's half-brother. Same father, different mothers.
* Parodied in ''WesternAnimation/JohnnyBravo''.
-->'''Darth Vader knock-off''': I did not destroy your second cousin. I ''am'' your second cousin!\\
'''Johnny''': Nooooooooooooooo!!!
* ''WesternAnimation/JusticeLeague Unlimited'':
** In the episode "The Once and Future Thing", it's revealed that Warhawk, assumed to be the LegacyCharacter of Hawkman, is (or will be) in fact the son of Hawk''girl'' and ComicBook/GreenLantern John Stewart.
** "Epilogue", the FullyAbsorbedFinale of ''WesternAnimation/BatmanBeyond'', reveals that Bruce Wayne was Terry [=McGinnis=]' genetic father. Warren [=McGinnis=]' reproductive DNA had been overwritten with Bruce's as part of Amanda Waller's Batman Beyond project.
** Hades also tries to do this with Wonder Woman, with a twist that he had to resort to a technicality when WW pointed out her origin story doesn't ''allow'' her to have a father (she was sculpted of clay and made flesh by the breath of her mother, Hippolyta, instead of born). Hades claimed he helped Hippolyta sculpt her. Shayera suggests Diana use her lasso of truth to get the real story out of him, but Diana decides she just doesn't care if he's telling the truth or not -- she already has [[TrueCompanions a real family.]]
* ''WesternAnimation/MoralOrel'': The episode "Dumb" shows that Nurse Bendy is Joe's mother.
* Parodied in ''WesternAnimation/PhineasAndFerb'', in the episode "The Chronicles of Meap". The pair mistake an alien villain (named Mitch) is the eponymous Meap's father, due to miscommunication. Later, after having discovered this, Mitch quite explicitly tells Meap "Just so we're clear on this, I am '''not''' your father!"
* A variation was used in the Pale Kids episode of ''WesternAnimation/{{Recess}}''. Lawson hated the Pale Kids because of something that happened to Tiny Sedwick, a kid who had to go to the Pale Kids because he broke his foot while playing Pickle. When telling the leader upfront, the Pale Kids laughed, with Lawson reacting with confusion as to what they think is so funny about his reason, before the leader tells Lawson that he ''is'' Tiny Sedwick (or at least was).
* The final episode of ''WesternAnimation/TheReplacements'' reveals that Conrad Fleem is Todd and Riley's uncle.
* ''WesternAnimation/RobotChicken'' recreates and elaborates the scene (with Creator/MarkHamill as Luke Skywalker, too!):
-->'''Vader:''' No, Luke...''I'' am your father.\\
'''Luke:''' That's not true! That's ''impossible!!!''\\
'''Vader:''' And Princess Leia is your ''sister!''\\
'''Luke:''' That's not true! That's...improbable!\\
'''Vader:''' And the Empire will be defeated by ''Ewoks!''\\
'''Luke:''' That's... highly unlikely.\\
'''Vader:''' And as a child ''I built C-3PO!''\\
'''Luke:''' ...enh?\\
''(Cut to some indeterminate time later. Vader is relaxing having a coffee while Luke is learning against the pylon smoking a cigarette.)''\\
'''Vader:''' ...and the Force? Well, that's just microscopic bacteria in your bloodstream called midichlorians...\\
'''Luke:''' ''(snuffs cigarette, walking off)'' Look, if you're not gonna take this seriously, I'm out.
** Earlier, they parodied it with George W. Bush and his daughter Jenna as Vader and Luke respectively.
-->'''Jenna:''' That's not true! That's impossible! My real father would let me go clubbing as late as I want! [[[FlippingTheBird flips Dubya off]]]
* In a episode of ''WesternAnimation/{{Rugrats}}'' Angelica says to Tommy "I am your cousin!" Follow by Tommy's {{Big No}} reaction.
* ''WesternAnimation/SamuraiJack'' reveals in its penultimate episode that [[spoiler: the Daughters of Aku, including [[SecondRider Ashi]], are ''literally'' his children, born of the High Priestess consuming some of his essence years ago. This enables him to [[VillainOverride take control of her]] and use her to fight Jack [[AndIMustScream against her will]]]].
* A big [[TheReveal Reveal]] at the conclusion of the first season of ''WesternAnimation/ScoobyDooMysteryIncorporated'', where we learn that Brad Chiles and Judy Reeves, two of the members of the original Mystery Incorporated, are Fred's real parents. Mayor Jones actually took Fred away from them when he was a baby.
* From ''WesternAnimation/SouthPark'' episode 201: Eric Cartman, Scott Tenorman's father is also YOUR father!
* Parodied in ''WesternAnimation/TeamoSupremo'' when Skate Lad corners the [=CheapSkate=].
-->'''[=CheapSkate=]:''' You can't turn me in, Skate Lad.\\
'''Skate Lad:''' Give me one good reason.\\
'''[=CheapSkate=]:''' Well, um, because, uh... Skate Lad, I am your father.\\
'''Skate Lad:''' Huh?! No you're not; my dad works down at the sporting goods store. I look just like him, loser!
* Parodied in ''WesternAnimation/TeenTitans''. In the first episode of the fourth season, Control Freak [[TrappedInTVLand enters]] a ''Franchise/StarWars''-esque TV show, kicks the Darth Vader lookalike and approached the Luke lookalike with saying, "I am Count Rol Freakow, the twelfth-level space samurai that trained Baran Rang. And... '''I am your father!'''". Followed by the typical [[BigNo "NOOOOOOO!!!!"]]
** Also played with when Starfire and Killer Moth each try to convince Silkie/Larva M319 to choose between them. Killer Moth's attempt: "Larva M319, I am your father. Join me and we can... go on a picnic or something." Silkie already knew this.
* Said word for word, in ''WesternAnimation/{{Ultimate Spider-Man}}'', when Spider-Man heard that Power Mans parents are working for Scorpio, Spidey's [[ImagineSpot imagines]] Dr Doom saying this to Luke Cage.
* Parodied in ''WesternAnimation/TheVentureBrothers'':
-->'''Monarch:''' Hank, what if I told you that your mother was someone you've met before? And that your father was not your REAL father?\\
'''Hank:''' What?\\
'''Monarch:''' Hank! ''I'' am your real father!\\
'''Hank:''' [utterly unconvinced] No, you're not!\\
'''Monarch''' PSYCH! Oh man, I totally got you. You were all like, "Oh, daddy! You're my daddy!" You are so gullible, what's that like?
* ''WesternAnimation/WinxClub'' has Roxy finding out that Queen of the Earth Fairies, Morgana is her mother.
* Such a moment happens in ''WesternAnimation/{{WITCH}}'' when Caleb finds out that [[WickedWitch Nerissa]] is his mother.
* In ''WesternAnimation/XMenEvolution'' (and also in the comics) Nightcrawler is lured out to a construction site with a mysterious note that promises that "everything will be explained". A hooded figure comes out of the shadows (actually, since it is early evening, there aren't many shadows to speak of, so they obviously added this in for dramatic effect) and, after making Nightcrawler squirm in confusion and anticipation for about thirty seconds, throws her hood off to reveal Mystique, [[BigBad Magneto's]] EvilChancellor of sorts and says, "Kurt, I'm your mother." For bonus points, she does it a second time with Rogue (who was adopted, but still), though since it was in the middle of Rogue having a mental breakdown from all her absorbed personalities fighting in her head, it wasn't nearly as dramatic.
** The original 90s cartoon also did this with Nightcrawler and Mystique, but with the added twist that BigBad leader of the [[PathOfInspiration Friends of Humanity]] Grayden Creed, Jr. (who was already exposed in an earlier episode as being Sabertooth's son) was Mystique's son and Nightcrawler's half-brother(Just like in the comics).
*** X-Men scribe Creator/ChrisClaremont originally intended Mystique to be Nightcrawler's ''father'' -- she's apparently a ''really good'' shapeshifter -- but ExecutiveMeddling derailed those plans.

[[folder:Real Life]]
* The biggest real life example is the revelation that birds are the direct descendants of non avian dinosaurs
* Recent evidence has backed claims that a Frenchman, Jean-Marie Loret, was the product of an affair between UsefulNotes/AdolfHitler, who was a German soldier in World War I, and his mother when she was 16 in 1917.
* The great Hawaiian king Kamehameha's biological father may well have been his rival, Kahekili.
* Creator/ArnoldSchwarzenegger's son with the cleaning lady. He didn't know Schwarzenegger was his dad until the press got hold of the story.
* There are uncertain claims that O.J Simpson may be Khloe Kardashian's father.
* According to an interview in the '90s, Lee Harvey Oswald's youngest daughter, who was an infant at the time of the JFK assassination, grew up under a new name when her mother remarried shortly afterward and didn't know Oswald was her father until she discovered a box of old letters and newspaper clippings in the attic.