History Main / SequelHook

** The oldest stories usually ended like this. The first story, [[Recap/DoctorWhoS1E1AnUnearthlyChild "An Unearthly Child"]], has the TARDIS land on another planet and the radiation meter rise without the TARDIS crew seeing.
** The Renaissance-set 1970s story [[Recap/DoctorWhoS14E1TheMasqueOfMandragora "The Masque of Mandragora"]] ended with the Doctor warning that the titular EldritchAbomination would be able to attack Earth again WhenThePlanetsAlign towards the end of the twentieth century. This was never followed up in TV continuity, but has had several different ExpandedUniverse follow-ups.
** [[Recap/DoctorWhoS28E13Doomsday "Doomsday"]] set up for [[Recap/DoctorWho2006CSTheRunawayBride "The Runaway Bride"]] via Donna Noble suddenly appearing inside the TARDIS.
** [[Recap/DoctorWhoS29E5EvolutionOfTheDaleks "Evolution of the Daleks"]] ends with Dalek Caan, last surviving member of the Cult of Skaro, escaping. The Doctor tells Martha that he has no doubt that they will [[Recap/DoctorWhoS30E12TheStolenEarth meet]] [[Recap/DoctorWhoS30E13JourneysEnd again]].
** [[Recap/DoctorWhoS29E13LastOfTheTimeLords "Last of the Time Lords"]] has two:

*** The last scene sets up [[Recap/DoctorWho2007CSVoyageOfTheDamned "Voyage of the Damned"]] (and indirectly, [[Recap/DoctorWho2007CiNSTimeCrash "Time Crash"]]) by having the TARDIS suddenly crash into, of all things, the ''Titanic''.
** [[Recap/DoctorWhoS30E6TheDoctorsDaughter "The Doctor's Daughter"]]: After her [[DisneyDeath apparent death]], Jenny revives and steals a spaceship to see the universe, [[LikeParentLikeChild just like Dad]]. She has yet to reappear on the TV show, but has made a few ExpandedUniverse appearances.
** [[Recap/DoctorWhoS30E8SilenceInTheLibrary "Silence in the Library"]]/[[Recap/DoctorWhoS30E9ForestOfTheDead "Forest of the Dead"]] sets up future appearances of the mysterious River Song by leaving almost everything about her unanswered.
** [[Recap/DoctorWhoS30E15PlanetOfTheDead "Planet of the Dead"]]: Once everyone's back on Earth, Carmen the psychic gives the Doctor a very ominous prophecy.
--->"It is returning, returning through the dark. Oh, and Doctor...he will knock [[FourIsDeath four times]]."
** [[Recap/DoctorWhoS30E17E18TheEndOfTime "The End of Time"]] set up for [[Recap/DoctorWhoS31E1TheEleventhHour "The Eleventh Hour"]] (though in a sense every regeneration episode except [[Recap/DoctorWhoS24E1TimeAndTheRani "Time and the Rani"]] is a ''de facto'' Sequel Hook) by having the badly-damaged TARDIS falling towards Earth.
** Creator/StevenMoffat said that [[Recap/DoctorWhoS31E13TheBigBang "The Big Bang"]] set up for the ''entirety'' of Series 6 through the still-lingering mystery of the Silence.
** The finale of series 6, [[Recap/DoctorWhoS32E13TheWeddingOfRiverSong "The Wedding of River Song"]], blows them all away with the reveal of the First Question. The Oldest Question in the Universe. The Question That Must Never Be Answered. That question is: ''[[TitleDrop Doctor Who?]]''
** [[Recap/DoctorWhoS34E8MummyOnTheOrientExpress "Mummy on the Orient Express"]]: The AI Gus has gotten away, with his boss unidentified. And they know who and what the Doctor is, and know how the Foretold worked, which is what they wanted.
** [[Recap/DoctorWho2016CSTheReturnOfDoctorMysterio "The Return of Doctor Mysterio"]] ends with the alien brain posing as the German doctor escaping into the body of a UNIT soldier.

[[folder:Web Original]]

** Considering season 5 was announced, plenty in [[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 "Twilight's Kingdom, Part 2"]]. Such as the whereabouts of Scorpan in all of this, what new powers the rainbow elements entail and how Ponyville will now function as a kingdom, not to mention how Discord's completed reform will be displayed.

* ''WesternAnimation/StarWarsTheCloneWars'': [[Recap/StarWarsTheCloneWarsS2E19TheZilloBeastStrikesBack "The Zillo Beast Strikes Back"]] ended with scientist Dr. Boll being given orders from [[BigBad Palpatine]] to clone the deceased Zillo Beast. Unfortunately, the show's initial CutShort status ultimately made the series unable to [[WhatHappenedToTheMouse follow up on it]].
* ''WesternAnimation/StarWarsRebels'': Series finale [[Recap/StarWarsRebelsS4E13FamilyReunionAndFarewell "Family Reunion]] [[Recap/StarWarsRebelsS4E14FamilyReunionAndFarewellPartII -- and Farewell"]] ends with protagonist Ezra Bridger having been lost in hyperspace with antagonist Grand Admiral Thrawn while liberating Ezra's home planet from the Empire. Sabine's closing narration (covering the period of {{time|Skip}} of ''Film/RogueOne'', ''Film/ANewHope'', ''Film/TheEmpireStrikesBack'', and ''Film/ReturnOfTheJedi'') informs the audience that she and Ahsoka Tano are setting out on a journey to find him.

* At the end of ''[[Literature/TalesOfTheMagicLand Urfin Jus and His Wooden Soldiers]]'', we get a glimpse of Ruf Bilan the traitor escaping his cell and fleeing into the underground tunnels. He goes on to kickstart the conflict of ''Seven Underground Kings''.

* ''Literature/JurassicPark'' ended with one of these where Dr. Grant, being kept in Costa Rica by their government who was still investigating the Isla Nublar incident, is approached by an agent of the U.S. government about a path of destruction being carved through South America by a group of 'strange reptiles' that are swarming farms and devouring plants with lysine, the amino acid Hammond had all the dinosaurs bred to be dependent upon. Unfortunately this hook was ignored and the [[Literature/TheLostWorld1995 followup book]] was a sequel to the movie.

** Some fans really hope that the controversial epilogue is one of these, despite the author saying that it is not. It's practically an ''anti''- sequel hook, since it seems to only exist to assure us that they all lived HappilyEverAfter.

* ''Franchise/AvatarTheLastAirbender''
** Zuko's question to Ozai at the end of the ''WesternAnimation/AvatarTheLastAirbender'' GrandFinale: "Where is my mother?"
** It did technically lead to SequelSeries ''WesternAnimation/TheLegendOfKorra''...but it takes place over 70 years in the future and most of the former cast is dead. The first episode even [[TrollingCreator trolls the audience]] about the hook, with a character asking a now elderly Katara about it and her explanation being cut off.
** There's also ''[[ComicBook/AvatarTheLastAirbenderThePromise The Promise]]'', a graphic novel {{Interquel}} trilogy set one year after the end of the War; in first installment, we discover the end of the conversation started by the above hook - which answers ''absolutely nothing''. It even ends with the ''exact same'' sequel hook, only Zuko is now asking Azula about Mom instead of Ozai. Thankfully, the ''next'' comic interquel, ''[[ComicBook/AvatarTheLastAirbenderTheSearch The Search]]'', has this plot hook as its central premise, so we'll finally get some closure.
*** And then ''The Search'' saddles us with some more: Azula has escaped, and it's unclear whether she'll be redeemed. Also, Zuko and Mai are still broken up, though with that one, ''Korra'' implies that they did get back together and had children.

* ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'': "Attack of the Twonkies" ends with Jimmy realizing [[SomethingWeForgot he never sent Sheen's Twonkie back]] (which never mutated due to Sheen's [[HollywoodToneDeaf bad singing]]), which reproduces and its offspring hop into Retroville. However, nothing comes of it and from that point on Twonkies would be hidden in each episode as a FreezeFrameBonus.

* ''WesternAnimation/{{Bionicle}}: The Legend Reborn'' ends with Mata Nui and the other heroes discovering that uniting the settlements of Bara Magna (literally, by pulling them together) creates a HumongousMecha and that the patterns on a stray coin and on the shield of a defeated Skrall soldier depict a map. [[AndTheAdventureContinues They set out to find where it leads]], with Mata Nui's friends determined to accompany him...and the toy-line got canceled, the sequel scrapped, so the story had to be wrapped up in a comic in which Mata Nui left his friends behind due to the page-limit.

** At the end of ''ComicBook/SpiderMen'', Peter makes it back to his own universe and starts wondering if his dimension has a Miles Morales (the new Ultimate Spidey). We don't see the results of his [[JustForPun web search]] (until ''Spider-Men II'', that is), but Peter is stunned.

** ''[=FireRed=] and [=LeafGreen=]'': Arguably larger than ''Ruby and Sapphire's''. After the BigBad is defeated and the characters all get their just endings, Sird shows up as Mewtwo flies away, using the last amount of energy she could attain for one last attack...''Which turns the Pokédex holders to stone.'' And with that, the arc ends.

'''Picard (with understanding dawning)''': They're...''coming''...

* ''Fanfic/{{Empathy}}'' ends with the [[Franchise/TheIncredibles National Super Agency]] deciding to recruit the Big Hero team to work under the [[WesternAnimation/DespicableMe Anti-Villain League]] and a mysterious villainous figure visiting Callahan in jail and forcibly recruiting his services. This leads into ''Fanfic/{{Unity|Finmonster}}''.

* ''Manga/GiantRobo'' has possibly one of the most sadistic, but not because of any fault of the writers'. The final OVA episode ends with the Earth decimated but able to recover, the IPO gutted of several of its top men, and SmugSnake Koumei informing the Magnificent Ten that all is according to the plan of Lord Big Fire, with Operation BR about to begin, suggesting that Big Fire is about to launch a true operation to conquer the world after Genya's plot both crippled their major opponent and simultaneously made sure the world would survive to be ruled over, leaving it ambiguous as to whether the entire operation was masterminded by Koumei or Big Fire himself. However, the sequel was unable to be made due to funding problems, so several critical explanations and Koumei's presumed come-uppance were never actually made, much to the frustration of the OVA series' many fans.

* ''WesternAnimation/KungFuPanda'': In hindsight, the blatant {{Unreveal}} of why Po the panda has a goose for a father could be considered the Sequel Hook for the first film, this question finally being answered in the second.

** {{Double Subver|sion}}ted at the end of ''Manga/JoJosBizarreAdventurePhantomBlood''. Dio is defeated, Jonathan and Erina are married, they're boarding a ship to America for their honeymoon, everything points in the direction that the story is now ending. Oh, some guys are carrying a treasure chest onto the ship with a still-alive Dio in it, how cute. Hang on, we're seeing what happens ''right now''? Hold the phone, did Dio just ''kill'' Jonathan?! Well, darn, that's a bit of a DownerEnding...wait, Erina is pregnant with Jonathan's child? The Joestar legacy lives on!
** At the end of ''Manga/JoJosBizarreAdventureBattleTendency'', an older Joseph can be seen at a modern airport mentioning to a Japanese tourist that he's going to Japan to see his daughter and grandson, the latter of which is the protagonist of the next part of [=JoJo=], ''Manga/JoJosBizarreAdventureStardustCrusaders''.

* ''Fanfic/{{Empathy}}'' ends with the [[WesternAnimation/TheIncredibles National Super Agency]] deciding to recruit the Big Hero team to work under the [[WesternAnimation/DespicableMe Anti-Villain League]] and a mysterious villainous figure visiting Callahan in jail and forcibly recruiting his services. This leads into ''Fanfic/{{Unity|Finmonster}}''.

* ''WesternAnimation/TheIncredibles'' ends with The Underminer arising from the Earth's surface and threatening an all-out war against humanity; the film's sequel, ''WesternAnimation/Incredibles2'', picks up from this exact place in the story, while ending on a similarly cliff-hanging note at the end.

* In ''WesternAnimation/TheSuperMarioBrosMovie'', [[spoiler:Peach's backstory prior to ending in the Mushroom Kingdom is yet to be resolved, plus though she and Mario end the story as close friends, some of their ShipTease moments already laid out groundwork for their friendship to eventually blossom into romance. Also in the post-credit scene, a Yoshi egg is shown to be hatching in the sewer.]]

* {{Double Subver|sion}}ted at the end of part 1 of ''Manga/JoJosBizarreAdventure''. Dio is defeated, Jonathan and Erina are married, they're boarding a ship to America for their honeymoon, everything points in the direction that the story is now ending. Oh, some guys are carrying a treasure chest onto the ship with a still-alive Dio in it, how cute. Hang on, we're seeing what happens ''right now''? Hold the phone, did Dio just ''kill'' Jonathan?! Well, darn, that's a bit of a DownerEnding...wait, Erina is pregnant with Jonathan's child? The Joestar legacy lives on!