"The Doctor promises that some day he will return. He never does. One can try to fill in some missing story for this - a couple exist from the Eighth Doctor era - but the fact of the matter is, here Susan is treated like any other companion. Which is to say, she's abandoned...Perhaps someday the Doctor will carry out his promise.""What happened to the mouse?" occurs when a minor character, action, or very minor plotline is suddenly dropped from the story for no apparent reason, without any real explanation about what happened to it, and without a resolution. There are several main reasons this happens: in movies, the most common is that scenes are excised in editing, but references to them still remain elsewhere in the film. Another common reason is that a Wrong Genre Savvy audience mistakenly attached too much importance to what always was intended to be a throwaway. A third is that The Law of Conservation of Detail was not properly applied: a Bit Character was a little too lively, so that he didn't appear a throw-away, as why was that much detail given for one? If the element comes back just as you've forgotten about it, this is actually a Brick Joke or a Chekhov's Gun. If the element doesn't come back, but the show hangs a lampshade on it at the end, then it's Something We Forgot. If it escapes your notice until after the show is over and you've gotten up to go to the fridge to make a sandwich, it's Fridge Logic. Alternately, if it's a character that's disappeared, it's a variation on the "What Now?" Ending; not only are we unclear what happens to the character, but this also can leave doubts as to whether they even survived once they broke away from the other characters. Another character or the Narrator may remark that they were never heard from again. The trope's name refers to a scene in The Last Emperor in which the title character violently throws his beloved pet mouse offscreen. There's no sound of the mouse hitting anything, but it's never seen again, leaving its fate ambiguous... in the theatrical cut, anyway. What Happened to the Mouse moments can be very rich soil for Epileptic Trees or Wild Mass Guessing. Not to be confused with Aborted Arc, which is when a major story arc or plotline is dropped without resolution, or Chuck Cunningham Syndrome, where a major character just plain disappears. A What Happened To The Mouse that is deliberately created and where the creators have no intention of ever resolving the question is a Noodle Incident. A What Happened To The Mouse that is returned to as a Brick Joke is Something We Forgot. Often the result of a Wacky Wayside Tribe, a Forgotten Fallen Friend, a One-Scene Wonder, or a Big-Lipped Alligator Moment. Compare with Left Hanging, Uncertain Doom, Kudzu Plot, Red Herring Twist, Out of Focus. Related tropes include Never Found the Body and "What Now?" Ending. May involve a Shrug of God. See also Offscreen Inertia if you imagine the plot line still stuck at that spot for eternity.
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- Western Animation
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- In The Brothers Grimm story Maid Maleen, she is imprisoned with a servant. They break free, and get a job. After that, Maleen ends up marrying the prince, with no more mention of the servant.
- Well, since a prince has like, castles and lands and such, logic would implicitly lead to the conclusion he just hires the servant... as a servant.
- In Rapunzel, The woman who took and raised Rapunzel does not appear again after throwing Rapunzel and her lover into the wilderness. Certainly she is never punished.
- In Sleeping Beauty, the evil fairy curses the princess, and sometimes she's the old woman who gets her to prick her finger, but she never appears after that. Certainly she is never punished. Disney rectified both of the above examples, of course.
- In "The Benevolent Frog," the Lion Fairy does not appear again after her encounter with the king when she imprisons his wife and daughter in the castle.
- In "The Bee and the Orange Tree," when Aimée stings Tourmentine, the ogress and her husband disappear from the story.
- In "The King of The Golden Mountain," we are told at the beginning that the merchant has a son and daughter. The daughter never appears again.
- In "The Six Swans," a witch married to a king turns her six stepsons into swans. After six years, their sister manages to bring them back to normal and they all live happily ever after but the Wicked Stepmother never appears again and neither does the king who doesn't know what his wife has done.
- A Crown of Stars: In chapter 8 Shinji and Asuka run into their counterparts of another universe. After that chapter those counterparts were not seen or mentioned again.
- One episode of Script Fic Calvin and Hobbes: The Series has Calvin and Hobbes attempting to transport their snowmen to safety. Once Calvin's mom brings him a camera, the plotline is abruptly dropped and never referred to again.
- In the Battle Royale fanfiction Heads is Heads, Toshinori is left behind by everyone after the 13 living students escape the island and his ultimate fate is left unclear.
- In Twillight Sparkle's awesome adventure, Celesia's nuclear weapon arsenal is brought up once and then never mentioned again.
- My Little Unicorn:
- Inquirius and Cookie Dough (who was a core member of Star Fleet in the first one) don`t play any role in the sequels. According to Word of God that`s because he had no idea how to use them anymore. The same goes for Abra Kadabra, who is only there to make Goldwin come alive.
- Another example is My Brave Pony: Star Fleet Magic II one-shot character Cerise, who, despite being a high-ranked Starfleet member and being only the 3rd character shown to be able to use the Uniforce, is only mentioned once in passing later.
- Go Jyu Sentai Gigaranger: The Shadow King is never referenced after Episode 9. It's explained away by the end of chapter narration that the timeline shifted.
- In Vinyl and Octavia Machete Their Way Through the Jungle, Vinyl's motivation for going to the jungle and fighting her way through it (alongside Octavia) is so that she can find an ancient treasure which she thinks can save her dying father. After this story, her father is never mentioned again and it's unrevealed what his fate is.
- At the end of PnF: Stolen Identity, Phineas and Ferb leave Ferb's Evil Twin by the lake with the device he had Phineas help him build...yet we don't know where the Evil Twin came from, why he picked Phineas, why he looks like Ferb and why he needed the machine to begin with. Though given the author's style, this isn't as bad as it could be.
- This is actually inverted in Fist of the Moon. Most readers completely forget that Mamoru is supposed to be somewhere, as he never appears or is mentioned in the first few chapters. Then he returns in chapter 5, and we discover he was studying abroad in China. (So basically, we found out the mouse is okay before we're told it was thrown off-screen).
- In Thousand Shinji, it's never revealed what happened to the remaining Rei clones after the battle against Armisael. Or the NERV staff who survived the Final Battle.
- The Second Try: After Lilith is destroyed and Gendo shoots himself in the head, it's never revealed what happened with Adam being implanted in his hand. However, when he semi-wakes up from a coma during the last chapter, he notes that he can't feel his right arm. Hmmm...
- Once More with Feeling: After her chat with Shinji next to his mother's grave, Ghost's Lilith wasn't seen again. Several readers wondered what happened to her.
- Fanfic/Embers: In chapter 51, the flashback/vision to Temul's attempt to warn the Western Air Temple about the upcoming Fire Nation attack, we learn that Gyate (later revealed to be Aang's mother) had a daughter, who was almost old enough to be given to the Eastern Temple to be raised. And that she was pregnant at the time of the attack. The fact that Aang may have relatives out in the world is never touched upon again.
- Möte i Monsunen, a song from 1935 by the Swedish musician Evert Taube (known to write all manner of gibberish and getting away with it because of his status as a national hero) has an ending very reminiscent of this trope. A sailor by the name of Fritiof encounters another sailor, and tells him of when he sailed across the seas with wild animals on board. A few of the ending lines would be something like this, translated from Swedish: "But, Fritiof, the elephant, what became of it?" "When we meet again, I will give an answer to your question" and then promptly the conversation gives place to a description of how Fritiof rows back to his boat.
- The Big Pun song Twinz has an opening verse about a gangland hit gone wrong that is so catchy that it pretty much makes the song. Once the listener is told that they killed the wrong man, the hit is never mentioned again. Even worse, the video for the song covers an alternate plot that does not exist in the song.
- Justin Bieber, in his song Omaha Mall, goes to check out some girls. He says they look good, but you never know in Omaha Mall and suddenly girls are never mentioned again in the song.
- The Lamb of the Genesis Concept Album The Lamb Lies Down on Broadway is mentioned only once, in the very first song on the album.
- In James Blunt's "You're Beautiful", the first verse ends with the line "...but I've got a plan." We never find out what this plan involves, or if anything happens as a result of it. He later goes on to say that he "[doesn't] know what to do". The music video suggests his plan is to commit suicide.
- Hansel and Gretel (the originals). They release the Seven Deadly Sins on the world from their adoptive mother's corpse, and we never know what happened to them after that, or why the heck they did it. Next we see them, they've reincarnated as Conchita's servants.
Myths & Religion
- Open up a mythology book. Chances are, if you're reading the Perseus story, you'll know that Acrisius, King of Argos, simply had bad luck when it came to having children (or at least males), and learned through the Oracle of Delphi that while he wouldn't have any luck any time soon, his daughter, Danae, would have a child that would eventually kill him. After that, everyone knows that Acrisius stuck Danae in a box and put her in the ocean, where Zeus impregnates Danae in the form of a Golden Shower, thus leading to the creation of an important hero. You never hear about Acrisius again until a long time after, especially in your text. Depending on your version, he's more or less become something of a poor man, and happens to be visiting funeral games where Perseus also happens to be playing. As Acrisius sits in the stands, a stray discus launched by Perseus strikes an unsuspecting Acrisius in the head, thus fulfilling the prophecy that his grandson would kill him. The presence of Acrisius itself seems to combine this trope, Brick Joke, and some sort of Chekhov's Prophecy.
- In many versions of Arthurian legend, Arthur's mother has three daughters with her first husband: Morgause, Morgan le Fay, and Elaine. The first two play pivotal roles in Arthur's life, but Elaine is typically mentioned once in passing and then never heard from again.
- Elihu spends a few chapters ranting at the eponymous character of the Book of Job, then disappears and isn't mentioned in the last portion, where God rebukes the rest of Job's "friends".
- A common interpretation is that Elihu doesn't get rebuked by God because his points, against both Job and the other companions, were correct. If anything he's sort of an Inversion—Job's three friends are mentioned for thirty-odd chapters before Elihu suddenly speaks up out of nowhere.
- If Elihu gets it, then Satan must be fuming...one of the two main protagonists who have a bet over the temptation and scarification of Job, he isn't involved any more after the first few chapters.
- In the New Testament, we never hear any word of Jesus' stepfather Joseph after the "Did you not know I would be in my Father's house" incident when He was twelve. Church tradition says he passed away some time before Jesus started his ministry.
- There's a pastor's story about a nice guy whose family went off to Christmas service without him. He wasn't a believer, because he doesn't get why God would become man. After his family leaves, some birds fly into his window in in the heavy snow, and he tries to herd them into his warm barn nearby. After being frustrated in his attempts, he muses that if he were a bird, he'd be able to get them to understand. Then the church bells happen to start ringing, and he sinks to his knees as the Eureka Moment washes over him. The story ends there, with no mention of what happened to the birds.
- In The Eddas, the first man and woman are created by Odin and his brothers Vili and Ve. These brothers are never mentioned again anywhere, despite the obvious importance of such characters. Some people have rationalised this by suggesting that they're avatars of Odin himself, who occasionally appears as a trinity to confuse people.
- In some retellings after Christianity began to merge with Norse Mythology, the two were Odin's last hope for sentient life in his dying breath after Ragnarok, and segues into the Adam and Eve story of the Bible.
- Thomas Paine wonders in his book The Age of Reason what happened with the dead who rose after Jesus died according to the Gospel of Matthew. Did they go home, back to their graves, or what? It's never said.
- A two-week 1995 FoxTrot storyline had Paige getting the role of Cleopatra in the school's Anthony and Cleopatra play, (with Morton playing Anthony, of course). The story ended before the play started, with Roger noticing Paige's name in the play program. After that strip, the story suddenly ended, with no actual strips of the play being performed, and the story was never mentioned again.
- In a 2010 Funky Winkerbean storyline, the title character was involved in a near-head-on collision with a woman yaking on a cell phone. This catapulted Funky into a brief Time Travel (or was it) arc. When we come back to the present, Funky's in the hospital with assorted injuries. Not a word was spoken, before or since, about Cell Phone Lady.
- This 1988 Garfield strip has a blind date of Jon's named Gwen, who dresses as absurdly as he does on dates and finds him cute. Garfield even says "God made two of them!" Although she would have been a good recurring character, perhaps as a Distaff Counterpart of Jon, she was never mentioned again.
- An In-Universe example in Peanuts, as Snoopy is writing his novel. He links all of the various subplots together in one sentence and boasts about how nicely everything fits together... that is until Linus reads it and asks, "But what about the king?" Snoopy throws his typewriter at him.
- Often occurs in Professional Wrestling, after Tonight In This Very Ring is invoked (as mentioned on that page).
- An especially egregious one is from the most recent NXT. At some point it stopped being a competition (which may very well qualify as an example itself) and was more or less third brand not unlike a lesser version of WWE's version of ECW. William Regal was eventually made matchmaker (GM for all intents and purposes) which led to a number of plotlines that were hastily resolved when it was decided NXT would tape exclusively at Full Sail University in Orlando, Florida... all except one: In the last month of the show someone was going around attacking various wrestlers. Percy Watson, Alex Riley and Derrick Bateman all ended up on the receiving end of beat downs by the unknown assailant who attempted to frame (perhaps?) Percy for the latter two attacks. However after the Full Sail tapings WWE decided not to show them until they could secure a TV deal for the revamped NXT and so it's gone back to being taped before Smackdown with all the plotlines dropped... including the mysterious backstage assailant.
- Another example is the Anonymous Raw GM. After a month or so period where the Raw GM position consisted of Vickie Guerrero and then Bret Hart the GM position was instead given to an anonymous person who issued directives via emails sent to a laptop read by Michael Cole. This continued for a year before Triple H became WWE COO and the Anonymous Raw GM was almost immediately dropped with no resolution or even a hint as to who the GM was actually supposed to be. (John Cena did lampshade the plot thread just after John Laurinaitis assumed power as GM, arguing that WWE should "bring back the computer.") Almost a year later, and long after anyone cared, it was eventually revealed that it was Hornswoggle, an apparent reference to when he was equally anti-climactically revealed to be Vince Macmahon's supposed long lost son.
- GTV, an hidden camera segment during the Attitude Era. It was never revealed who was behind the camera. According to WWE's web series, "Five Things," the person running GTV was going to be Tom Green as part of a working relationship between WWE and MTV. However this angle never played out, so when GTV was dropped, the man behind the camera remained a mystery for at least a decade.
- Then there was that time Samoa Joe got kidnapped by ninjas. He was gone for like a month or so, came back, and nothing ever came out of it — considering how Joe was acting very similar to how Abyss was acting at the time, it was widely believed he was originally slated to be a member of Immortal. Of course, this was neither the first nor last time TNA did something like this, with Vince Russo booking and all.
- American Top 40: An occasional feature was "Whatever Happened To ... ?" where host Casey Kasem would profile a one-hit wonder, or early prolific star of the rock era who suddenly disappeared off the charts, quit recording, etc. Casey would simply explain what said artist (or group, as appropriately) had been doing in recent years, if they were involved with current projects, and so forth. Sometimes, he'd even play the song they were best known for.
- One of the most popular "Whatever Happened To ... ?" stories was of The Singing Nun, a Belgian singer christened Jeanine Deckers who recorded the French language-recorded "Dominque" and had a huge No. 1 hit in the United States in late 1963. Casey's stories on Deckers would always explain that The Singing Nun gave all royalties to the convent but later left the Catholic church in the late 1960s, and later the Belgian government made a claim for back taxes to the tune of $63,000 ... more than Deckers could afford, and no documentation existed that she had donated anything to charity. (The common stories are that her attorney failed to document it and/or that the Catholic church had either destroyed all records of it after they and Deckers broke ties, or that they simply did not have any more responsibility for her and did not have the funds.) Updated several times through the years, the final chapter came in 1985 when Casey announced that Deckers had died (of suicide) at age 51.
- Two entire specials were based on the "What Happened to the Mouse" concept – one in July 1973 and the other in April 1975 – where Casey played the biggest singles by the One-Hit Wonder acts of the rock era. The 1975 special had a slightly different chart, with a few different songs added and a different No. 1 song.
- With one of the "Whatever Happened To ..." artists profiled in the original 1973 special, one artist was deleted from the 1975 updated special. It seemed that Janis Ian, whose 1968 hit "Society's Child" was played for the 1973 show, had just released a new single, "At Seventeen," and although it had yet to make the Hot 100, there were already strong vibes about the song. The good feeling was justified: The song became a long-running hit in the summer of '75, eventually peaking at No. 7.
- Eddie Izzard's Dress to Kill tour featured the 'Firework joke' which he repeatedly references throughout his performance then ends the show without telling it. It's lampshaded by several people in the audience who immediately begin asking for it. He doesn't.
- Billy Connolly performed a long, long routine beginning with his account of a mysterious body found in the street in one of the more exclusive and upmarket suburbs of Edinburgh. He then meanders off into the intricacies of going to the toilet on aircraft, and how the food chain works, and the sheer logistics of so many people on board aircraft who will all need to use the toilet at some point... he gets back to the mystery corpse in Corstorphine (and its effect on local house prices) about twenty-five minutes later. By which time everyone's forgotten how the story started.
- Romeo and Juliet: Where the hell does Benvolio go after Mercutio dies?!
- It has been speculated by a commentary on the book that Benvolio's line "That is the truth or let Benvolio die" is significant, given that he lied and said Tybalt started the fight with Mercutio (when it was the other way around). It is unlikely, however, that he was actually killed, so his disappearance remains a mystery.
- At least one revision done long after Shakespeare died had one of the nobles at the end of the play announce that Benvolio was also dead. They still fail to mention how.
- Another common interpretation is related to Benvolio's Meaningful Name. "Benvolio" means goodwill in Latin. He's around for all of the more comedy-like parts — perhaps Benvolio is only a metaphor after all.
- It has been speculated by a commentary on the book that Benvolio's line "That is the truth or let Benvolio die" is significant, given that he lied and said Tybalt started the fight with Mercutio (when it was the other way around). It is unlikely, however, that he was actually killed, so his disappearance remains a mystery.
- In Macbeth, Fleance speaks a grand total of two lines, escapes death at the hands of the murderers Macbeth sent after him and Banquo, then...disappears. He's not even mentioned at the end. More than a bit puzzling because per the witches' prophecy, he's destined to someday be the rightful king of Scotland, and, as he's now missing and with no living guardians, it's more than a little important that someone find him.
- In the epilogue to Angels in America, we see Prior, Belize, Louis, and Joe's mother are all pretty chummy with each other five years after the events of the play, but Joe seems to be pretty much forgotten.
- Cyrano de Bergerac: Did Viscount de Valvert survive his Sword Fight with Cyrano at Act I Scene IV or not? The last we see about him was that his friends carried him after his defeat, and after a little mention by Roxane at Act II Scene IV, we never heard of him again.
- The Taming of the Shrew starts out as a play-within-a-play; a lord and his servants trick a drunken peasant named Christopher Sly into thinking that he's the lord by dressing him up and waiting on him, telling him that he's been mad for years. They all sit down to watch a play about Katerina and Petruchio...and then they don't show up again. One ending has Sly waking up, convinced that he dreamed the whole thing and eager to try the trick of "taming a shrew" out on his own wife; however, many scholars think that it was added later and that Shakespeare never wrote it.
- In King Lear, Shakespeare decides to Shoo Out the Clowns and have the Fool drop out of the plot after Act 3, even though he was a constant companion of Lear up to that point. Some stage productions interpret this as the Fool dying — perhaps influenced by the line "My poor fool is hanged" in the last scene, though most critics interpret that line as referring to Cordelia.
- When Iago's plan starts blowing up in his face in Othello, Iago frantically covers his tracks and implicates Bianca in the plot to kill Cassio. Bianca is arrested and dragged off, and that's the last time she's seen. It's not even stated if she'll be released after Iago is finally exposed.
- Similarly, Adam, beloved Old Retainer and sidekick of Orlando in As You Like It, disappears after they arrive in Arden. Since Adam is elderly and nearly starves to death on the journey, some productions imply that he died; scholars speculate that the actor who played him may have needed to double as someone important during the second half of the show. (Whatever Shakespeare's intention was, Adam doesn't die in the source material.)
- In Henry IV Part 2, all of Prince Hal's old Eastcheap companions are rounded up and sent to prison once he ascends the throne... except for Poins, who hasn't been seen or spoken of since the end of Act 2. This is particularly jarring in The Hollow Crown, where his role is expanded considerably, but he still disappears without explanation.
- Watching the original play version of Peter Pan, you might wonder, "What happened to that rich cake Hook was going to kill the Lost Boys with"? There are several answers to this question:
- A stage direction after Hook enters, discouraged that the boys have found a mother, suggests that he "has perhaps found the large rich damp cake untouched".
- The novel expands this as one of the Noodle Incident adventures the children have in Neverland: "[The pirates] placed it in one cunning spot after another; but always Wendy snatched it from the hands of her children, so that in time it lost its succulence, and became as hard as a stone, and was used as a missile, and Hook fell over it in the dark."
- In the musical, the boys find the cake at the end of the "Wendy House" scene. Wendy tells them not to eat it, and they go inside.
- Cirque du Soleil's Mystère raises this question by leaving a key character (and more importantly performer), Brian Le Petit, out of the curtain call. The answer is All There in the Manual: when Moha-Samedi hauls him out of the theater, it's for good, as Brian wasn't "part of the show" to begin with.
- Sideswipe in Transformers: The Ride is last seen getting sucked into Devastator's vortex. It is never made clear whether he was destroyed or made it out in time.
- BIONICLE, due to its nature, has plenty of examples:
- The Dark Hunters guidebook mentions that Shadow Stealer is currently coming back from a mission and is ready to face his "master", the Shadowed One. It was deemed an irrelevant Narrative Filigree and never touched upon again.
- The same happened to Aphibax's secret mission to track the events on the island of Voya Nui.
- Order of Mata Nui agents report in the book Bionicle World that Karzahni is training his Matoran slaves in order to conquer the outer world he just learned of. The plot had been Retconned out of the story, so he went to fight without them, taking his Manas crabs instead.
- The book also mentioned that Roodaka had become the ruler of her island and will probably train her people to form an army. What became of it: Nothing, as her island was destroyed by Kaiju, and her status was never touched upon.
- What more, the book revealed the Mana-Ko, formerly believed to be beastial guardians of the Big Bad, were actually secret double agents for the Order (good guys), and would be called into war. The war did happen, but they were never mentioned again.
- The eponymous slime of Unicorn Jelly simply disappeared after episode 581.
- Before To Save Her, the author claimed it was an intended symbolic plot point about childhood, magic or something or another.
- In Questionable Content the character Sara just disappears and is never mentioned again. The Cast page lampshades this by saying she was eaten by an allosaurus. Author Jeph Jacques says he just dropped her for being boring.
- In 2012, three new characters were introduced as library interns: Claire, Emily and Gabrielle. Claire became a major character and started dating Marten. Emily is a popular recurring character. Gabrielle largely vanished after the introductory story.
- You'd never know in Ciem that resident Depraved Bisexual Poison Dart Eddie even had a sidekick, as he is so quickly brushed aside and never mentioned again. Even Claire Rauscher has the decency to at least return in a later chapter, if only to fall to her death.
- Sluggy Freelance had a minor one where a reader actually asked, "What happened to the demonic ferret?" The answer was, "She's still there with the other demons, I just forgot to draw her."
- Get Medieval's "Where Are They Now?" Epilogue is infamously missing Oneder, Iroth's bodyguard-turned-Muslim holy warrior. In the annotated reruns, Ironychan stated that she left out Oneder (and Sir Gerard) because she felt there was nothing really left to say about them.
- Also; Asher's kitten. It disappeared shortly after Asher received it and was unmentioned for months, until it reappeared after the "Trip To The Moon" arc. Ironychan has never said whether or not this was planned all along or whether the constant cries of "WHERE'S THE KITTY" caused her to bring it back.
- Monette's baby, in Something*Positive. The full humor and drama of an unplanned pregnancy are played to maximum effect, but Monette's baby disappears from the plot with barely a ripple (subtle clues in the dialogue reveal it was either stillborn or died very shortly after birth). Millholland lampshaded the baby's absence much later in a filler strip in which the baby turned up in a Lost and Found box. Word of God says it was stillborn.
- Jessica's pregnancy in Better Days, though it's possible that the sequel, Original Life (which follows the children of Better Days' main characters) will bring this up.
- In Original Life, it is shown that Jessica has many children (enough so that Elizabeth feels uncomfortable asking her to take time babysitting her own kids).
- Elizabeth's father all but vanishes as the series goes on. This is notable since he was written as being a reasonable parent to Elizabeth as opposed to her strict mother, and backed his daughter on things like having Fisk over. One has to wonder why he had no input in his wife all but forcing their daughter to marry someone she didn't care about.
- In Bob and George, on average once per Mega Man (Classic) game parody, Mega Man would beat one of the Robot Masters without killing them, and for the most part they never showed up again, though they spawned numerous Epileptic Trees. However, on rare occasion they showed up again, especially Shadow Man, who became a running joke due to his stealthy nature and the Epileptic Trees about his disappearance.
- Shadow Man in particular said, after his initial appearance, that he'd disappear into the background until he was needed once again, which seemed a natural set up for him to return. It was years before he really did, and at every new plot development he was tagged as possibly being behind it. One fancomic lampshaded this by having him come and say the reason he hadn't shown up again was because, as a ninja he would return and strike when least expected... but the readers kept expecting him.
- Emily from Mortifer. Last appeared on this page, and was promptly never seen again. This trope was barely averted however, when a fan drew a (spoileriffic) piece of Fan Art Lampshading it, which the author saw, stating that she had completely forgotten about the character and that she would try to find a way to bring her back into the story.
- Narrowly averted in YU+ME: dream . The author realised she was going to do this with No Face, a minor but very scary enemy and so Dropped a Bridge on Him for completeness. Lia had just made a Face–Heel Turn and he got in her way. Cue a Neck Snap in the background of a conversation.
- For a long time it looked like Haban and Breya Andreyasn in Schlock Mercenary were heading this way, made more glaring and worrisome by their last appearance ending on an ominous note, though the enemy AI claimed they were not killed. But then six and a half years after disappearing, they got better.
- Sonichu in spades. The author's wild-running attention span has caused him to start and drop so many plots and characters, it isn't even funny.
- Rumors of War: Who was that walking around as Couric? Where did Penelo disappear to? What about the rest of the characters on the ship in the first Story Arc? What about all those character Nenshe recruited to the Order of Orion? (Some of these turn into Brick Jokes later in the comic.)
- Averted in 1/0. By the end of the strip's run, every character that has ever appeared, even those you thought were one-off throwaway characters, has been accounted for.
- There is Minihoof, Dirk's pet miniature pony, who has not been seen since he entered the Medium, roughly six months ago in-comic. This is kind of concerning, given that Minihoof is tiny enough to be easily crushed and it's not certain Dirk has been home to feed her...
- Sollux says here that all the trolls are going to die, or just that "we all" are going to die, and he specifically mentions that he will die twice. As of October 25th of 2014, Vriska and Karkat have been killed twice each, and possibly Kanaya if her transforming into a rainbow drinker is counted as a "full death," and maybe Tavros, Nepeta, and Feferi counting their spirted selves exploding (which would also bring Vriska's death total at three). Either Sollux conveniently left out that he's not the only troll (and definitely not the only one) who will die more than once or the story's planning underwent a few changes from that point. This prophecy has not been mentioned since then.
- Not mentioned, perhaps, but not forgotten. Every single troll has died in one timeline or another as of this update, the doomed timeline that John is from having massacred them.
- Despite the vague implications that were set up, the story surrounding what happened to Mituna to leave him brain-damaged may never be gotten, as Meenah wound up the only Pre-Scratch troll to be given a focal role in the finale. Granted, it may not be relevant to the big picture in the end, or maybe Hussie meant to address it at some point but got caught up with some hundred other plot threads or plain forgot.
- [[spoiler: The ending of the comic leaves a lot of unresolved plot points, and the fates of various characters are unknown.
- In the My Little Pony arc of Murry Purry Fresh And Furry, it is ominously mentioned near the beginning that Molly is no longer a friend to pony land, possibly setting her up as the Big Bad of the arc. However near the end the author simply lost interest in continuing, abruptly ended it with Princess Celestia being arrested and called it quits without never once mentioning Molly again.
- The titular character in Oglaf barely appeared at all in the first place, and hasn't shown in the comics in years.
- On the occasion that Penny Arcade indulges in continuity (for example, Anne's new table-top game crew in 2014), the multi-part comic will suddenly end as soon as Jerry and Mike run out of jokes or come up with a joke that would only work individually, abandoning anything that was potentially brewing in the multi-part.
- Sam & Fuzzy has this happen often, as the story over the years has created Loads and Loads of Characters, and many have unresolved plot points, from simple ones like "Did Mr. Ackerman get repaid?" to complete story arcs like Detective Morris's investigation.
- The Story of Anima has Jade's briefly seen caretaker, who vanishes from the story after only one page. When mercenaries attack the airship, not only is her fate left uncertain, the cast themselves seem to forget she even existed.
- This is actually a power of henchmen in Nodwick. They have a Become Irrelevant power that allows them to vanish any time no one is directly paying attention to them.
- Defied in The Order of the Stick. A mini arc featured the group of heroes tangling with a Bandit Clan, and the father & daughter team that led the bandits were spared at the end of the arc and given just enough characterization that fans frequently speculated on when/how the two would return to the story. The fan speculation and questioning irked author Rich Burlew enough that he wrote in a single comic where the two encountered a much more plot critical enemy, engaged in some Mugging the Monster, and were summarily killed for it.
- Averted in Daughter of the Lilies; in a magical university setting, a frog is used as sacrifice to summon a demonic entity that, as intended part of the experiment, possesses the frog. Readers commented that they wanted to know what happened to the frog, and the author did indeed reveal the ultimate fate of the frog.
- Aitor Molina Vs: Pandemia said something about a clone in A Mvs Seahorse Seashell Party and it was never brought back.
- Subverted in Hateful Comparisons: Vete A La Versh vs. Telegordo with "The Mandarin" Bator Medina.
- From "Swimming!", an early episode of lonelygirl15: "Whatever happened to that girl, Cassie?" Over 430 episodes later, we're still none the wiser.
- The White Parade has a variation of this. Part III sees Ean sending Allys on an errand to fetch a sandwich from the Subway across the street from the hospital where he's staying... only for it to never be mentioned again once it's retrieved.
- This strange youtube video takes this trope quite literally. It features an animated mouse who just walks across the screen and then is never seen again.
- The Literal Music Video for Anything For Love has Meat Loaf continue to complain about his dropped necklace long after it stops being relevant to the video's plot.
- In Kung Tai Ted's review for Tiger Love, Ted becomes so disturbed at the scene where the titular tiger mauls a boy that he breaks character and asks if the child actor actually got killed.
- The interstitial webisodes aired prior to The Walking Dead's second-season premiere revolved around a survivor named Hannah and her attempts to protect her family from walkers. At the end of the webisodes, Hannah (running to escape the city with her kids) manages to kill a zombie that bites her, and tells her children to run away as fast as they can before she turns. We see what happens to Hannah afterwards (she's eaten by a horde of walkers, and becomes the titular "bicycle girl" that Rick Grimes discovers in the pilot episode), but what happened to her kids?
- The Nostalgia Critic invokes this trope with his "but what happened to Boomer?" rants in various movie reviews, everytime a character's fate, especially if it was a dog, is not resolved in a movie, at least for a while. If it is before the end credits roll, a short "Boomer will live!" scene is shown. Boomer was a pet dog in one of the reviewed movies.
- At the end of Spoony's Ultima VI review, Chuckles the Jester is given a Sinestro Corps ring from the Gate Cleaner. Since the review, Chuckles has not been seen or mentioned and it seem whatever storyline was being set up was dropped.
- In a Tweet, Noah (Spoony) explained that his dog Oreo got into his prop closet and tore up the Chuckles costume, forcing him to retire the character.
- Ultra Fast Pony:
- In "Pega Please", the central conflict of the episode is the question of how to deal with a sleeping dragon that's spewing smoke over Ponyville: should the protagonists approach the dragon diplomatically, or just kill him? The climax comes when Fluttershy berates the dragon for using a word he's not allowed to use, then in the denouement, Twilight explains that the dragon is now "dragone". Whether the dragon left peacefully or in pieces is never clarified.
- In "Pinkie's Day In", Pinkie Pie suddenly acquires two babies, apparently via kidnapping. Mr. and Mrs. Cake leave to find the babies' original parents, but they're completely unsuccessful. It becomes a moot point by the end of the episode, so the babies' origin stays a mystery.
- Chakona Space features Allen Fesler's Tales of the Folly series. Chapter 2 introduces Captain Foster's cockatiels. After chapter 3, they are never mentioned again.
- Vinny's Tomodachi Life streams feature one character who is sent off to visit other islands via StreetPass. Since Vinny never uses StreetPass (presumably because of the innate danger of taking a valuable modded 3DS to conventions and the like), said character is never seen again.
- Occurs in The Sick Land once the main character and narrator, Alex, arrives at the Facility. While the fate of the first research station, where the story starts, is witnessed by Alex (and thus, the reader), and the entire second half of the story takes place in the Facility, not a single word is mentioned about what happens to the second station and Alex' former colleagues there.
- The Happy Video Game Nerd: It was never explained what HVGN's mom (or a hallucination thereof) was doing in his house in the "Little Nemo in Slumberland" review.
Most of us have had an online friend disappear without a trace. Chances are you'll never know what happened to them.
So, er, guys, what did actually happen to the mouse?
It's in your hand. You're using it right now.
But what if you're using a laptop?
Integrated into your keyboard.
I'm using a touchscreen.
Please kindly change "keyboard" to any parts of the machinery that replaces the function of the mouse.