"Into the middle of things" — taken from the poet Horace, this refers to the poetic technique of beginning a narrative poem at a late point in the story, after much action has already taken place. Homer makes use of this in The Iliad, making this trope Older Than Feudalism — and Aristotle diagnosed it in Poetics, making it one of the first identified tropes.
When used in TV it's generally a preamble to a Flash Back, which falls under How We Got Here — where the action starts at the middle or end of the story and quickly flashes back to the real beginning.
In medias res is a quick and easy way to have an action sequence at the beginning of an episode; for this and related tricks, see Action Prologue. Both in medias res and Action Prologue are also quite common in Video Games for the same reason, and to allow the player to get into the actual gameplay fairly quickly without them having to sit through long expository cut-scenes.
Frequently, the first act of an in medias res opening will end with a situation that looks like it will lead to the death of a major character. It usually doesn't.
See Lost in Medias Res for what happens when this is done badly.
Often inspires someone later on to remark: "This is where we came in!"
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Anime & Manga
In an episode of Ouran High School Host Club, The Chessmaster Kyoya wakes up sitting on a bench at a "commoner" shopping mall, all alone, with no money, and no clue how he landed there. Half an episode is then spent on figuring that out.
Naruto Shippuuden starts the entire series off In Medias Res, the first 5 minutes of the first episode don't come until about 40 episodes later.
Getter Robo Armageddon begins with Ryoma Nagare in prison for murder He was framed as part of an Evil Plan, two main characters already dead, various different types of Getter Robos already designed, built and mass produced; a mad scientist threatening the world with his ultimate creation, and an entire lengthy war against an alien menace that had been presumably won Not.
Which is only fitting since the OVA is a sequel to a Japan only Radio Drama. But there are still some plot points that get explained in flashbacks.
Pokémon showed a "special preview episode" in the very first American run of the series; however, the series itself has a standard Welcome Episode. This would not be the only time 4Kids would air a mid-story episode as a preview: Magical DoReMi was previewed with the 4th episode (where Doremi [Dorie], Hazuki [Reanne] and Aiko [Mirabelle] become witch apprentices [witchlings]), and Winx Club was previewed with a episode from late in the first season, before then airing the proper premiere at the start of the regular run.
Pokémon did it for a while in the beginning of Diamond and Pearl, as well.
Record of Lodoss War does this with the first episode, and introduces the characters and plot in the second episode. With the exception of the narrated opening sequence on the War of the Gods, the plot of the episode takes place between episodes 5 and 6.
This really wasn't intentional. They produced the action-packed fifth episode first to convince backers to finance more, then produced the rest of the story, as the chronologically-first episode wasn't as exciting. For some reason DVD releases have kept the episodes in production order, even though all it does is confuse people.
Fullmetal Alchemist starts in the middle of the brothers' search for the Philosopher's Stone, with the manga occasionally having extra omake chapters that describe short events that happened during their journey before the start of the series.
The 2003 anime version also begins in the middle of their journey, with the actual introduction happening in the third episode and several more episodes of flashback until it catches up to where they were at the end of the first two episodes.
The American DiC dub premiere of Sailor Moon was another special preview episode, which was actually the first episode of the R series. It featured all five Senshi (unlike the real first episode) but could still serve as somewhat of an introduction.
The US dub of the Viewtiful Joe anime began airing with episode 5, which introduced Junior. The actual first episodes were aired as a special later on.
The Gintama anime starts with a crazy misadventure that doesn't introduce the characters though show how crazy the show is. The next ep starts the show proper from the beginning.
Berserk (moreso in the manga than with the former the anime adaptation) starts after Guts already started his quest to hunt down his nemesis Griffith. It isn't until the end of the first story arc than the manga flashes back to the beginning shows everything that led to Guts' hatred for Griffith.
Tokyo Majin starts off the first episode with the team fighting off a horde of zombies. The next few show them first meeting up and getting the powers with which to slay the demons for the rest of the series.
An interesting Double Subversion (or played straight, depending on how you look at it) in Puella Magi Madoka Magica. Episode 10 explains the alternate timelines, but every timeline has technically the same start, due to being parallels of each other. However, the Start of Darkness for the anime actually is explained in Episode 10, which explains Homura's intentions that were not explained in the first two episodes. In other words, the anime starts at the how many times is it now parallel timeline, but we learn of the beginning in episode 10.
There's also the first scene, which seems to be this, but then it's All Just a Dream, but a bit later it's some kind of Dreaming of Things to Come thing, and eventually turns out to be a scene from episode 10 that chronologically happened before the first episode.
Victory Gundam started out this way: the first few scenes were of an exciting MS battle, then the anime takes several episodes to show how the characters got there. (Supposedly, this was due to Executive Meddling: Tomino wanted to introduce the eponymous Gundam several episodes into the show, but the execs wanted it to show up in the first episode.)
The American dub for Cardcaptor Sakura, Cardcaptors, had the series start off with episode 8 and Syaoran/Showron's first appearance, mostly because Nelvana wanted to cater the series to the boys and decided not to bother with the series' main focus of being a girl's series.
The manga beings in the middle of Sakura capturing the Jump Card (already having recovered Windy and Wood), and then flashes back to her discovery of the book later. It should be noted that the original Anime begins before this flashback ever takes place.
Sangatsu no Lion begins when Rei is already living on his own and has already met the Kawamoto family. Every few chapters, the story alternates between the present and several flashbacks showing how he met the Kawamotos and how he got to where he is today.
The first episode of the Gungrave anime starts off almost at the exact middle of the series chronologically, with Brandon/Beyond the Grave protecting Mika from a few zombie hoards. After that, it suddenly goes back to the beginning and turns from a sci-fi action series to a mafia drama as it goes into Brandon and Harry's backstories and how they became a superpowered revenant and the Big Bad, respectively.
As opposed to the manga and first anime, Yu-Gi-Oh! did this by beginning the series with Yugi already solving the Millennium Puzzle and having Yami Yugi merged with him, with later episodes filling in the gaps. Part of the reason this was done was, not unlike the case for the Fullmetal Alchemist animes, the first anime had already covered the events of the first seven volumes of the manga, and the second begun during the eighth during the Duelist Kingdom arc. As a result, the more important arcs from the early volumes were instead covered later as streamlined versions, while the story of Yugi solving the Puzzle was almost entirely skipped. In fact, that actual scene of Yugi solving it wouldn't even be shown until The Movie.
The insane Widget SeriesIppatsu Kikimusume uses this to amusing effect. The protagonist Kunyan always starts off each episode in some insane predicament (such as Trapped In The Sauna, or wedged between two buildings several stories up), and part of the humor comes from going back and seeing exactly how she got there in the first place.
The FUNimation dub of Dragon Ball GT originally started halfway through episode 16 with a dub-only episode called "A Grand Problem", which summed up why Goku was a child again, why they were fighting robots on another planet and other such details through a series of flashbacks.
It's common for comics to have a variant called the Batman Cold Open. The difference is that the Batman Cold Open is generally some unrelated crime that we never really get any explanation on, whereas In Medias Res revolves around getting to where we are. Then there are the issues that open with Batman fighting the Demon's Head. Which are In Medias Ra's.
Dennis Hopeless is fond of this trope. Both Avengers Arena and Cable and X-Force, first and second issues released on the same days as each other, start this way.
The first issue of Nightwing started with the title hero drowning in a different city from Gotham, having suffered a haircut (at the time, he'd had the Dread Mullet). The rest of the comic set up the reason he was there and gave him a reason to stick around in the new city.
After the One Year Jump in DC, everything started in medias res. The next year was spent catching the reader up with the weekly comic 52.
In All Fall Down, the story begins with superheroes already falling out of the sky.
The first issue of Spider-Man 2099 opens with Spider-Man swinging around downtown and beating up criminals; he then goes back to his apartment and reminisces about how he became Spider-Man. This does a good job of making the issue a self-contained origin story, even though two issues of plot happen between the last page and first page of the comic.
Assassin's Creed: Brahman open with Jot Soora kidnapped by the Assassins and put into the Brahman device to relive his ancestors memories before cutting back a week to show how he became involved in the Assassin-Templar conflict.
Composure starts with Princess Celestia preparing for Twilight Sparkle's arrival at Canterlot, then jumps to Princess Celestia waking up in a hospital bed, unable to remember what had happened, unable to use magic, and with severe lightning burns on her side. The rest of the story jumps between following the events after the hospitalization and showing what caused it.
In the Total Drama story, Legacy, the opening chapter is set years later than most of the next two chapters.
In Sophistication And Betrayal, the story begins with the protagonist having already been in Equestria for over a year, with a series of flashbacks filling in the details that led up that point over the course of the chapters.
The first story for the Darkwing Duck fanfiction series, Negaverse Chronicles, starts with the members of the Friendly Four after they lost a battle against Negaduck before going back to show the characters' origins and how they came together as a team.
The Celestia Code starts with Twilight burning books, and we don't get a full explanation until the middle of the fic.
This technique is utilized in the Pokemon fanfic Natural Liberated, as the story starts a few weeks after the events which will be described in the trial via the testimony.
Megamind starts with the titular Genre Savvy villain falling from a fatal height, then flashes back. Way back.
Ratatouille begins looking at a house in the distance with the muffled sounds of what turn out to be shotgun blasts and then with Remy jumping through a plate glass window while carrying a book significantly larger than himself. It quickly jumps back to explain how the incident occurred.
Films — Live-Action
Forrest Gump is an interesting example. The film starts, not in the middle of action per se, but in the middle of the story chronologically. The main character proceeds to tell his life story, narrating a series of flashbacks, until his story catches up with the present.
Maverick starts with Bret about to get hanged, then flashes back until you reach the same point about halfway through the film.
Quentin Tarantino likes playing with the chronology of his plots, though only occasionally does he use an outright in media res plotline to its conclusion:
Reservoir Dogs starts off just after a botched heist, then follows the resolution of the heist to its conclusion, with occasional flashbacks of the heist's planning to show how they got there.
Pulp Fiction is more properly categorized Anachronic Order, beginning and ending somewhere in the chronological middle, and jumping around back and forth among several storylines.
Kill Bill: Volume One opens in media res, with The Bride killing victim number two before jumping back to explain how she got to that point; the film ends with the killing of victim number one, so it's not a straight example either.
Underworld begins with a bunch of seemingly random people shooting each other up on the subway. A well-known movie critic actually criticized the use of this trope in his review of the film, remarking that since we don't know who these people are or what their motives are, the action is disconnected and meaningless. Critics suffer from this issue so often it should be its own trope.
Iron Man 1 started off with Tony Stark riding in a Humvee with soldiers, established his amiable playboy charm, and then had the caravan attacked by the Ten Rings people. Flash back 36 hours, and we learn more about him and how he got there. It's not a point in the middle of the film, though, just near-beginning.
Captain America: The First Avenger starts off with explorers finding the HYDRA bomber that Captain America crash-landed in the Arctic, as well as his shield and (as it turns out) his frozen body. The film then begins proper after that, acting as a feature-length example of the trope.
Thor begins with Jane Foster and her crew accidentally ramming into something with their RV, which turns out to be Thor having been banished to Earth. The next half hour or so then goes back to detail Thor's life and the events that led to his banishment.
Memento could be said to start over In Medias Resevery three minutes. The main character can't form new memories, and so the entire story takes place backwards so that the audience has the same kind of experience that the main character does.
Batman Begins start the story proper in medias Ra's with Bruce Wayne in prison in Bhutan, before flashbacking to explain how he got there.
The Prestige begins with a shot of a pile of top hats scattered in some woods followed by Michael Caine performing a magic trick to a little girl, both of which only pop up in the last third of the film.
Inception begins with Cobb washing up on a beach before being dragged to meet an aged Saito. The film spends most of its running time recounting how Cobb ended up there.
Angels Revenge: The film was recut with the first half of the raid on the processing plant as an Action Prologue, then showing most of the first few acts as a flashback before returning to the rest of the raid. Naturally this was commented upon when the flm appeared on MST3K:
Mike: "Now that... was a long flashback."
National Treasure began with the characters digging up a sunken ship in Alaska without any explanation of how they got there.
Well, we hear about the Templar Treasure before that, and the Jump Cut lets us know one of the men digging up the ship is Ben, so we might assume it has something to do with the treasure. But you're right- there isn't any clear connection until we see that "Charlotte" is the name of the ship.
Mystery Team begins with the eponymous trio in the middle of a seemingly important investigation.
Just Married starring Brittany Murphy and Ashton Kutcher starts with the two main characters getting back from their nightmare of a honeymoon, and pushing each other around and spitting gum in one another's hair.
Gandhi begins with Mohandas Gandhi's assassination and his funeral, then cuts to him being thrown off a train in South Africa.
The Butterfly Effect begins with the main character frantically scribbling a cryptic sentence in his journal whilst wearing clothing from a mental hospital. The rest of the movie is spent catching up.
Reindeer Games kicks off with a montage of six dead Santa Clauses except at the end it turns out one's still alive in various locations, before flashing back to "Six Days Before."
Ershon: I think the best way to tell this story is by starting at the end, briefly, then going back to the beginning; then periodically returning to the end, maybe giving different characters' perspectives throughout. Just to, you know, give it a bit of dynamism . Otherwise it's just sort of a linear story (makes yawning gesture)
Eternal Sunshine of the Spotless Mind actually uses this trope very subtly. The beginning of the movie seems to be showing the first time that Joel and Clementine first met, and then fast forwards a few years where their relationship has actually gotten bitter and acrimonious. It turns out that they first met each other at a party, and their earlier meeting on the train was the first time they had seen each other *after* having their memories of each other erased. You could say that the story begins with the ending, but the plot actually progresses a little bit past that point.
Tony Gilroy's Duplicity shifts back and forth through time and Michael Clayton opens with a sequence then rewinds to four days earlier and then revisits the opening with more information and greater context that gives it a new meaning.
The 2013 CBC movie Jack starts with Jack Layton in his old age at close to the time of the 2011 election, then alternates between the 2011 election campaign and various moments from Jack's past.
The narration of Upstream Color starts in the middle and jumps back and forth.
Highlander begins with a swordfight in New York. The first half of the movie then alternates between flashbacks to Scotland and continuing the New York story.
Man of Steel used this a lot. It starts in the beginning on Krypton, but then shows Kal-El as an adult. Through flashbacks, we see his childhood, then his adulthood several times.
J. Edgar begins with an elderly J. Edgar Hoover dictating his autobiography, at which point he is still head of the FBI and there are still important events going on. The film flicks between these and Hoover's stories of his life.
Out of the Past picks up with the hero keeping a low profile and operating a gas station in a small California town. He tells his new girlfriend Ann the first part of the story (looking for Kathie, then running away with her) in a long flashback before the story continues from present day.
The Iliad famously begins in medias res towards the end of the ninth year of Troy's ten-year siege. Of course, back when Homer was reciting this on street corners everybody KNEW How They Got There, which was a very long story in itself (or, rather, set of stories).
Richard Armour in his The Classics Reclassified describes "medias res" as "— beginning in the middle of things thus leaving the reader confused to the very end."
The Odyssey begins in the same way after roughly a ten year Time Skip with Athena urging Telemachus to go search for his missing father Odysseus.
The Homeric use of this made it into a standard convention of epic poetry, and the much later (and Roman) Aeneid begins in much the same way, with Aeneas' fleet threatened by a divine storm while en route to Italy. Aeneas fills in the beginning of the story later on using a Framing Device.
Kurt Vonnegut was very fond of beginning in medias res. Starting with Slaughterhouse-Five, which jumps around in time, his preferred method of storytelling involved telling a bit from here, a bit from there, until the picture is complete. Hocus Pocus is particularly notable for beginning a million years after the main action.
All of Kin Platt's Steve Forrester novels began with the reluctant teen/preteen "detective" explaining the events leading up to him spending the night in jail, being involved in a satanic ritual, or behind the wheel of his Uncle's Hudson Hornet enroute to killing a man.
All You Need Is Kill by Hiroshi Sakurazaka has an interesting example of it. The book starts off in the middle of a battlefield where some of the would-be supporting cast are killed off. At the end of the first chapter, the main character dies. He then wakes up in his bed, believing it to all be a dream, but many of the events throughout the dream happening before the battle start happening in real life (such as his platoon receiving punishment for taking alcohol from storage) while other events are slightly different (a woman soldier who he met in the dream on the battlefield before he died takes part in the punishment in real life, while she simply watched in the dream). In reality, the main character is stuck in a time loop due to accidental exposure to alien technology.
To Kill a Mockingbird starts with the sentence: "When he was nearly thirteen, my brother Jem got his arm badly broken at the elbow." That happens at the end of the book. The idea seems to be that it comes up in a conversation the adult Scout is having, and the book is her explaining the events that lead up to it.
Starship Troopers The book, not the movie. Whole first chapter is an action movie sequence. Then it goes back to how we got here.
One Hundred Years of Solitude opens thus: "Many years later, as he faced the firing squad, Colonel Aureliano Buendía was to remember that distant afternoon when his father took him to discover ice."
Each book of Stephenie Meyer's Twilight Saga opens with a preface that is describing a scene that happens near the climax of the story.
The Red Mars Trilogy opens the night of the assassination of John Boone, the first man on Mars, then jumps back about twenty-seven years.
Iain M. Banks' Use of Weapons starts in the middle of the story. Chapters labelled with the words "one, two" etc. go forward in time toward the climax of the book. Chapters labelled in roman numerals go backward in time towards the start of the book. The book ended with two climaxes — one that was the start of the story, and explained everything you didn't understand about the main character. The other ended the story properly.
The first chapter of the Dragaera novel Dragon starts out with with Vlad participating as a soldier in a battle between two armies. The second chapter goes back to the start of what got an assassin like him involved in something most assassins would want to avoid like the plague. The third chapter takes off where the first chapter ended, the fourth chapter takes off where the second chapter ended, and so forth. And the next-to-last chapter ends right where the first chapter starts.
Vlad lampshades this in the narration, apologizing for starting his story in the middle, while explaining that that's pretty much where it starts.
Jhereg does the same, with three timelines; one at the end of the story, one in the middle, and one starting with Vlad's childhood. The earliest timeline catches up to the middle timeline only at the very end of the book, shortly after the middle timeline catches up to the most recent.
Grave Peril is particularly faithful to this trope, starting a few days after Dresden's battle with a sorcerer and his summoned demon, but not describing this encounter until he re-lives it in a nightmare several chapters into the book.
Stephen King's Blaze starts off in the present and flashes back throughout the novel to explain how the characters got there.
Roland Deschain from The Dark Tower started his journey many years before the beginning of the first book, and when taking into account how many years that actually was, some would say the series itself only chronicles the end of the quest.
Margaret Atwood is fond of this trope. The Handmaid's Tale is a prime example, the current situation of the world visited in flashback. This is extended in The Year of the Flood, where characters and situations touched on in flashbacks in Oryx and Crake are given their own story.
Roger Zelazny’s Lord of Light begins with Sam’s return from Nirvana (“recovering from the peace which passeth understanding takes time”, p. 15) to which he is exiled after the Battle of Keenset at the end of chapter six.
Forever Gate: The book begins with Hoodwink awaiting execution. The reader finds out why he's there while he's on the run.
They Shoot Horses, Don't They? opens with would-be director Robert Syverten being sentenced for the assisted suicide/murder of his friend, Gloria Beatty. The rest of the book cuts back and forth between a How We Got Here flashback and the words of the judge passing sentence on Robert.
Storm Over Warlock begins with the Throg attack, with backfill to explain why Shann is out of the camp at the time, how he came to work there, the whole Throg/human conflict, and the earlier surveys of Warlock
Ordeal In Otherwhere opens with Charis fleeing the fanatics on Demeter, and remembering the plague that had so selectively wiped out the non-fanatics.
Forerunner Foray opens with Ziantha in the middle of a burglary.
Gifts, the first book of the Annals Of The Western Shore. Orrec begins the story after his voluntary blinding and the death of his mother, then goes back to his early childhood, returns to the point where the story began and explains the how and why of those first two facts, and goes on to the end.
Discussed and averted in I, Claudius. Claudius (the narrator) says that he prefers "the thorough Roman method, which misses nothing, to that of Homer and the Greeks generally, who love to jump into the middle of things and then work backwards or forwards as they feel inclined."
Live Action TV
Charmed does this once, where it starts with the sisters running away from the Cleaners, get their memories of yesterday erased and Wyatt wiped from existence, but they cast a spell tuning back the day and find out why the Cleaners are after Wyatt: he conjures a DRAGON out of a TV show, after magically switching channels to the dragon movie.
The pilot episode of Firefly, "Serenity", twice — first beginning in the middle of the Battle of Serenity Valley, and then flashing forward to the middle of a heist. See also the episode "Trash".
The most notable case is probably "Out of Gas". It starts with a deserted Serenity, except for a badly hurt Mal, without telling us how things went this way. Then it jumps back to the day Mal showed Serenity to Zoe for the first time, then shows us how the trouble started, and then keeps jumping back and forth between the "pre-crisis" and the "post-crisis" scenes, mixed with scenes showing us the day Mal bought Serenity and how every single member of the crew happened to join. It's a masterclass in how to use this literary device without losing focus or characterisation, as well as a compelling piece of drama in it's own right.
Tends also to be used on Alias. Hell, it would be easier to list the episodes that *don't* use this trope. That might be about 10% of them.
Used as the opening to each successive season of Revenge, the reveal typically taking place mid-season.
The first starts with a man, presumably Daniel, being shot on the beach the night of Emily and his engagement party.
The second starts with a salvage team discovering the sunken remains of sailboat "The Amanda" along with a dead body.
The third starts with Emily in a wedding dress being shot by an unknown assailant and falling off a yacht.
Also done for the episodes "Duress" and "Sabotage".
The "death lead-in" version was done particularly badly in one episode of CSI: Miami, where it was patently obvious Calleigh hadn't actually been shot.
The Doctor Who episode "Human Nature", first by opening the episode in the middle of an alien attack, then cutting into the middle of the Doctor's life as a human before revealing how he got there, by way of explaining the alien attack.
Cleverly lampshaded in "Love & Monsters", where Elton, who narrates the story, begins the episode with his encounter with the doctor and a hostile alien creature. He then admits that what we just saw wasn't the start of the story. "I just put that bit at the beginning 'cause it's a brilliant opening." Later, once he gets to the point in the story where the beginning action takes place he says, "don't get too excited, that's the point where you came in", and the sequence gets a bit fast-forwarded.
"The Girl in the Fireplace" begins with all of the people at Versailles running and screaming, and Reinette shouting for the Doctor through the fireplace. After the opening credits, the story is begun again, from the Doctor landing on the spaceship.
"Silence in the Library" begins with Charlotte explaining the Library to her father and Dr. Moon, when all of a sudden the Doctor and Donna run through the door, sealing it shut. The Doctor then says, "Oh, hello! Sorry to burst in on you like this. OK if we stop here for a bit?" The girl is shown as upset, and the opening credits then start, after which the story starts back from where Donna and the Doctor first land in the Library.
And then we have series 6, which starts off with an older version of the Doctor being killed, except not really, which doesn't happen in his timeline until the series finale.
Many episodes of Farscape start this way, and the pilot episode even invokes it on the main character, who is just as confused as the rest of us when he's suddenly thrown into a huge battle between spaceships and then is pulled into one of them with a bunch of weird aliens shouting all around him until finally one of them knocks him out.
The individual segments of NCIS begin with a black and white freeze-frame, and then go through the segment as usual, leading up to the events that culminate in the same image, which then switches to black and white again.
There was also a very effective "death lead-in" version of this done in season 5, opening with Tony performing CPR on Gibbs and a young woman.
LOST usually falls more into How We Got Here, but one use of In Medias Res was "Greatest Hits." It begins with Karl frantically running and getting into a canoe for reasons we don't yet understand, then cuts to the Losties, being led across the island by Jack for a dynamite demonstration. This allows an episode which is mostly a lead-up to the action of the finale to begin with a chase and an explosion.
Supernatural, Season 1, "Skin". It begins with the cops breaking into a house where someone has a girl tied to a chair and is about to kill her. When the cops confront the killer, it's a smirking Dean Winchester. The episode then shows How We Got Here. It also does an In Medias Res with the "Nightshifter" episode in Season 2... and How We Got Here reveals it's for almost the same exact reason.
Battlestar Galactica likes this trope, but a notable example is in the Season 2 episode "Scar." It starts off with a dogfight involving Starbuck, Kat, and the titular Cylon Raider. The episode then details the days leading up to this dogfight, highlighting the deaths of several Nuggets, Starbuck's downward spiral and Kat's rapidly rising Badass quotient, and the growing conflict between them. This is intercut with further scenes of the dogfight, building the tension each time as we go back to the main story, with the battle finally resolved in the end. Kat kills Scar, leading to Starbuck acknowledging her rival and delivering a moving tribute to the fallen pilots.
Caprica seems to be going the same direction, with the episode "End of Line" beginning with Zoe driving a car while chased by police cars and helicopters.
Nearly every episode of Flashpoint begins this way (the moment being the titular the flashpoint). However, the beginning intro often misleads the audience when the situation is much more complicated and different than they had originally expected.
The first episode of Hogan's Heroes features the group already in place at Stalag 13 with everything already in place. We're introduced to the operation only through Hogan giving a new prisoner who is actually a German spy a tour, and there's never a flashback episode showing how they set up their organization in the first place. Some of the elements in the pilot (most notably one of the characters, a few sections of the tunnels, and the use of black-and-white rather than color) differ from the rest of the show.
In a Star Trek: Enterprise episode T'Pol is screaming and thrashing in sickbay. After the intro, we see the events that led to this.
Star Trek: The Next Generation had one episode starting off with the ship exploding. And another starts out in an alien hospital — the doctors are puzzling over Riker's odd physiology. It later turns out that Riker was conducting surface reconnaissance on a planet that had just become warp-capable, as the Federation was about to make first contact with them. He'd been injured in an accident and was brought unconscious to a hospital.
The Shield did this, with the actual introduction episode "Day One", showing the events of the first day at the then newly-opened Police Station, not appearing until the second season. It also contains the Start of Darkness for some of the main characters.
Babylon 5 begins in this fashion as the original pilot was aired as a backdoor pilot well over a year before the series actually began. When released on DVD the pilot episode was also released separately from the first season. Some attempt at a Welcome Episode is still made, but events from the pilot are still referred to by characters and are assumed to be known. Further many relevant events leading to the current state of the universe that would be known to any person actually residing in it are withheld until later in the series. This was done on purpose since the creator didn't want to tell the story of a world, but only a 5 year slice of a much bigger story.
Radio Free Roscoe doesn't explain just how exactly they got a radio station until the end of season 1.
Power Rangers Samurai premiered with episode 3.The first two episodes originally titled "Call of the Red Ranger" were retitled "Origins" and aired near the end of the first season.
Breaking Bad for the first season and some of the second. Also the last half-season, which starts with Walt alone in a diner on his 52nd birthday before flashing back several months, not catching up to that point again until the very last episode.
In season 4 (documenting the 2010 tornado chase season), the first few minutes of the season's first episode shows the immediate aftermath of the tornado that destroyed Yazoo City, Mississippi, on April 24, 2010. The rest of the episode moves back to cover events from a few days prior to that storm.
In season 5 (documenting the 2011 tornado chase season), the entire first episode of that season covers the devastating tornado outbreak that tore through Mississippi and Alabama, on April 27, 2011. The next two episodes cover events from a week prior to that disaster, with the rest of the season following afterward.
The It's Always Sunny in Philadelphia episode "The Gang Gets Trapped" starts out with Dennis, Dee and Frank trapped inside a family home, in the midst of a plan to steal an expensive vase.
"What Kind Of Day Has It Been?", the season one finale of The West Wing, did this very well.
The pilot for Don't Trust the B---- in Apartment 23 begins with June catching Chloe making out with the former's boyfriend, before going back a week to her arrival in New York. When the story gets to that point again, it fast-forwards to June catching them in the act.
"Unrequited" starts with a scene that is later shown again. The story goes back to 12 hours ago. It was speculated that In Medias Res was done just to prolong the footage which is evidenced by many shots of flying flags and marching bands. The second scene might have been written as a teaser originally.
"Colony" starts in media res as well, and Mulder flat-lines. Scully appears and knows how he must be treated to be saved.
"Groundhog Day" Loop episode "Monday" - the pre-titles teaser shows Mulder dying of gunshot wounds before he and Scully get blown up in a bank heist.
"S.R. 819" starts with a man being rushed to the hospital. He's from the FBI and Scully is his emergency contact. Surprisinly, it's not Mulder, but Skinner. The episode then goes back to show what lead to his complete break-down.
Better Off Ted's episode "Jabberwocky". Starts with the main character about to do a presentation on a product that doesn't exists, literally says "So how did I get here?" and then jumps to explaining precisely that.
The Monk episode "Mr. Monk goes to the Bank" opens with the main characters locked in a bank vault, with the next 20-30 minutes showing how they got there.
The Buffy Musical Episode "Once More, With Feeling" started with the spell that was causing everyone to burst into song and dance already in effect.
Horatio Hornblower: The second instalment of this miniseries has two parts "Mutiny" and "Retribution". "Mutiny" starts with Commodore Sir Edward Pellew visiting Lieutenant Hornblower in prison, telling him and the audience that he's going to be tried for his life. The whole episode is told in one long Flash Back and explains How We Got Here, though not entirely from Hornblower's point of view. Importantly, we heard only half of the account of the mission. The episode ends in prison when Pellew and Hornblower finish their conversation. The next part, "Retribution", resumes the story where it was left, but this time it's more like In Medias Res with telling scenes of badly injured Lieutenants Bush and Kennedy who are being treated in the prison infirmary. The lieutenants face a trial and they continue to give a full account of what happened during the rest of their mission. It's being constantly interrupted with court testimonies and the judges' private discussion happening in the present. "Retribution" mixes this trope with Anachronic Order.
The cold opening Law & Order: SVU episode "Gone" (based on the Natalee Holloway case) starts at the typical midpoint of the show, with the suspects being arrested and arraigned on murder charges. The next 15 minutes fill in the blanks as to the investigation that led the cops and DA to this point.
Kamen Rider Blade does this within its first episode. It basically starts with a fight against a Monster of the Week, throws a lot of characters at the viewer after the fight, but it does not explain who the characters are, how they got their powers and what the monsters are. This is learned through flashbacks and exposition during the rest of the show.
The Haven episode "The Trouble With Troubles" begins with the heroes helping people evacuate the town when a volcano erupts. There is no flashblack, but there is brief dialogue explaining that a woman accidentally manifested the volcano with her Trouble.
This is a very common trope for biographies—specifically the author will start with a taste of some part of the subject's life that everyone's familiar with, then jump back to the mundanities of his/her heritage and upbringing. For example, Michael Korda's Eisenhower biography Ike: An American Hero starts out right before D-Day, chronicling the tension and uncertainty behind the scenes on the night before and quoting Ike as saying to a confidante (Kay Summersby), "I hope to God I know what I'm doing" before starting chapter two with a jump back to his childhood in Kansas.
Rarer in music but can be found in some concept-based albums (although this isn't a general rule).
Los Campesinos!!'s album Romance is Boring opens with a song called "In Medias Res" The first line '...But let's talk about you for a minute' suggests that the song itself begins in medias res.
The Decemberists's album 'The Crane Wife' opens with 'Crane Wife 3'; later on in the album comes 'Crane Wife 1 &2 ' which gives the listener the beginning of the story.
The first three parts of the Rush saga "Fear", which was split across four albums, were released in reverse order (i.e. Part 3 first).
The Joel Plaskett Emergency's concept album 'Ashtray Rock' begins with a track entitled "Introduction," which is (a form of) the opening lines of the last track, "Soundtrack For The Night."
Sonata Arctica's "Caleb" story is split into four songs; in chronological order it is "Caleb", "The End of This Chapter", "Don't Say a Word", and "Juliet". However, the actual songs were released in this order: "Don't Say a Word", "The End of This Chapter", "Caleb", "Juliet".
Nits' double-CD retrospective album Nits Hits does this - the first CD begins in the middle of their career and moves forwards from that point. Then the second CD starts from the middle again, and goes backwards to their oldest material.
In the Doctor Who audio drama No More Lies, the first episode starts with the Doctor and Lucie on the heels of a time traveling criminal named Zimmerman. They throw you right into the action making you wonder if you missed an episode. The actual story however deals with his attempt to escape leaving him trapped for years and eventually settling down and starting a family before the Doctor and his companion catch up with him to bring him to justice.
Microscope makes frequent use of this type of storytelling. The purpose of scenes in Microscope is to answer questions about important events in a dynamic fashion, so scenes often begin—or end—in the middle.
Wicked, although it starts father towards the end of the story than most. We open the day after Dorothy Gale has just melted the Wicked Witch of the West, with the all of Oz celebrating her downfall. Glinda The Good Witch of the North appears to tell them how horrible and evil she was- and then someone "didn't you know her once?" Thus begins the story of how the Wicked Witch- Elphaba- was born green, abused and neglected throughout her childhood, and eventually befriended G(a)linda. Turns out that Glinda was only pretending to hate her to secure good PR, so she could dispose of Oz's corrupt government as the (supposedly) dead Elphaba wanted.
Company opens during Bobby's 35th birthday party. The story itself is presented as vignettes of the lives of Bobby's married friends (with his birthday party also being a frequent link in between). The vignettes themselves are not presented in any chronological order as such (although they take place before the day of the birthday party). The final scene again takes place at the party.
Max Payne 3 begins with Max standing over a man who has an arm missing and most of his body badly burned. It is implied that Max did this as he laments what he has become. The rest of the game explain why he did this and who this person is.
Final Fantasy II starts off in the middle of a civil war between an empire and a resistance force.
In Final Fantasy IV, the player joins a captain who is returning from a slaughter, about which he and his men feel deep regret.
Final Fantasy VI opens with two soldiers and an amnesiac attacking a town. You're provided some exposition, but the background of this scene is unclear. It's made all the more baffling because you control the bad guys.
Final Fantasy VII starts with Cloud and AVALANCHE leaping off a train, beating up guards, and infiltrating a power plant to blow it up. You get some tidbits of information in the elevator, but you don't know what's going on or why until the mission is over.
Final Fantasy X begins this way, with the heroes gathered around a fire near the end of Yuna's pilgrimage. The first words are "Listen to my story," and playing the game then proceeds to tell us How We Got Here.
Final Fantasy X-2 begins in the middle of a mission to recover Yuna's stolen Songstress dressphere. We never actually see her joining the Gullwings, though they do explain why she joined them.
Final Fantasy XIII has this in spades. The game drops you right into the middle of its world, starting off with a large-scale action scene. It fills in exactly what is happening later.
Final Fantasy XIII-2 follows suit by starting Noel's side of the story in the middle and filling the beginning in at the beginning of the game. DLC expansions also serve as the beginning to the stories well underway parallel to the main story's progression.
Dragon Quest VIII starts after the hero has already agreed to help the cursed king and princess, and even after he's already recruited his first companion, and with very little exposition as to how things got this way. It's not until you recruit your next companion that she asks about the situation, and you're treated to Yangus and Trode's interpretation of How They Got There.
Halo begins with the warship Pillar of Autumn emerging from faster than light travel after fleeing from the most recent defeat in a war against aliens that humanity has been losing for decades. Of course, this isn't really covered in the games.
killer7 begins with the Smith syndicate storming Kun Lan's headquarters, and only after poking around the building does it become clear what it is you're there for, where the enemies are coming from and who the hell you even are.
Warriors Orochi starts in medias res, with Orochi having already devastated the various factions and forced them into the positions from which they will begin their counter-attack. How We Got Here is only briefly glossed over; it isn't explored in depth until the sequel.
The first Metal Gear game introduces the characters Solid Snake and Big Boss, and later games explore their backstories and incorporate it into an epic Myth Arc that has been in play for decades.
Gears of War opens with Marcus Fenix busting out of prison, with no explanation given as to what's happening or who or what the strange Orc people shooting at you are. The game actually does have an intro movie that briefly explains the whole COG vs Locust war, but it oddly DOESN'T play when you start a new game, only if you idle on the main menu for a couple minutes.
Tomb Raider: Underworld does this - the player makes their way through a burning Croft Manor until Lara is shot at by Zip. We then go back to one week earlier, and then play through a few levels until we are made to play through the intro sequence again, only this time we are shown why Zip was firing at Lara...
Syphon Filter 3 opens with the continuation from the cliffhanger of 2, skip to Logan being questioned in a hearing, and cut to a flashback of Logan (allegedly) murdering a "world leader" with a sniper rifle. Your first mission is spent on how and in what context Logan was shooting, and the entire game is a buildup to the climactic questioning scene, which is about 2 levels from the end.
Chrono Cross: After naming the main character, you're thrust into a sequence where he, Kid, and a random potential party member are going after Lynx. Eventually some strange events occur, and.. Serge wakes up in his bed at home. Naturally he was Dreaming of Things to Come.
Vagrant Story opens with VKP agent Ashley Riot infiltrating Duke Bardorba's manor, during an event that the narration dubs "The Graylands Incident," in which Ashley supposedly murdered the Duke. Want to know why Ashley is there, who sent him, and what is at stake? Watch the Attract Mode. Want to know whether he really murdered a bedridden, old nobleman with a kidnapped son? Finish the game.
Prince of Persia: The Sands of Time does this, overlapped with a Framing Device, although instead of being during an action sequence, it's instead very near the end of the plot, as he's telling his story to Farah. When you select "Save and Quit," the Prince even says, "Very well. I'll continue my story from here later." Note that the storyline-as-narration leads to some funny Fridge Logic when you realize, based on the Prince's lines when you have to continue, his story to Farah must have included lines like, "And then I was killed by the sand monster! ...No, wait a second..." The Prince himself lampshades this. When you die for real he says "No, wait. That's not how it happened. Let me start again." Lampshaded again when he concedes that he might actually be mad after all. And he was killed by the sand monster anyway (temporarily), so it makes sense that he's a little confused.
The intro movie to The Punisher ends with Frank Castle being arrested, and subsequent pre-level cinematics show him being interrogated by two cops; most of the game's levels take place prior to this questioning.
Sly Cooper 3 begins with a level where Sly infiltrates the island fortress of one Dr. M. He communicates with various allies via videophone, though their faces are blacked out. When you reach a certain point in the level, Sly has to fight a giant boss, which knocks his staff away and captures him, slowly crushing him to death. He takes this time to recall How We Got Here, and the subsequent chapters deal with him recruiting the allies who'll help with the final level's grand heist.
The Curse of Monkey Island starts in a fair bit of time after its predecessor's Mind Screw ending; what happened in between is never revealed, but hinted at by having it happen again in the game's last two chapters.
Monkey Island 2: LeChuck's Revenge starts with Guybrush hanging on a rope over a huge chasm. The better part of the game is spent on him recounting the events that led to this predicament. After he finishes the rope almost immediately snaps.
Uncharted 2: Among Thieves begins with Nathan Drake having survived a train crash in the middle of a snowstorm, with the game's earlier chapters showing all the events that led to that moment.
Far Cry Instincts: Evolution opens with a rail gun sequence atop a fleeing Humvee. As the Humvee is surrounded, main character Jack muses "...how the hell did I get here?" The game then cuts to Jack at a tropical bar, where the storyline kicks off.
Call of Duty: Big Red One begins in September or October of 1944 as the player, a sergeant in command of The Squad, helps attack a small town during the tutorial. After being wounded in the end, the story flashes back to November 1942 when the player character was a lowly private. After playing the mission which ends with your squad leader being wounded and you taking over, the game essentially skips the events of the tutorial and continues from October or November 1944 until crossing the Sigfried Line in 1945 at the end of the game.
In Dark Cloud 2, immediately after starting a new game you're thrown into the middle of an invasion of King Raybrandt's castle by Emperor Griffon's forces, the latest coup in a long-running war between the future world and the timeline-erasing Big Bad. You only have a very brief explanation of how the controls work before you, as Princess Monica Raybrandt, have to fend off the attackers with sword and magic. It's only after the final fate of the combatants is decided that the narrative calms down and introduces you to the main protagonist, Max, in the present time.
Knights of the Old Republic begins with a Sith attack on the Endor Spire, the ship you're serving aboard. You'll only get a reasonable grasp of what's going on after you escape the ship and talk with the other survivor, Carth. Almost certainly a homage to the original Star Wars.
The very first cutscene of Assassin's Creed: Brotherhood shows a part near the end of the game with Ezio confronting Cesare in person, then the first playable bit rewinds years to Ezio escaping from the Vault and Vatican immediately after 2.
Brothers in Arms: Hill 30 begins with the player and his squad about to get overrun. The player character is knocked off his feet by a scripted shell and loses conciousness. The screen then goes black and it takes you back eight days to D-Day where the narrative begins.
The first God of War begins with Kratos standing on a cliff, stating "The Gods of Olympus have abandoned me... now, there is no hope..." before he simply falls off. Athena spouts some babble while the camera shows him falling down the mountain, and when he finally hits the ocean... the screen blacks out and the game flashes back a couple weeks to when Kratos was sailing the Aegean Sea. Also, as the adventure moves forward, Kratos' backstory is revealed in media res. So the first God of War starts at the end, goes to the middle, and visits the beginning multiple times through the story.
The intro to Command & Conquer: Red Alert explains whythings are different, but not really how things are different (enigmatic comments about time telling the consequences, cut to unexplained CGI war scenes with one side using hammers and sickles as symbols). When the actual campaigns start, it is clear the war has been going on for some time.
Zeno Clash begins with Ghat running from his hometown after killing Father-Mother. As he flees his angered brothers and sisters, he explains to Deadra the first half of the plot through flashbacks.
Pokémon Ranger: Guardian Signs begins with you, as a veteran Rangner, and The Lancer in high speed aerial pursuit of several Pincher goons, in stark contrast to the prior two games which had you as a beginner. Minor backstory tidbits are displayed as flashbacks when they become relevant throughout the game.
Spec Ops: The Line begins with a helicopter chase over Dubai that ends in a sandstorm and fiery crash before going back to "earlier" when Walker, Adams and Lugo first arrived in the city. When you reach the part of the plot where the helicopter chase happens, Walker, who is crazy and going crazier, apparently gets a huge sense of Déjŕ Vu and says "This isn't right, we've already done this..."According to the game's writer, a possible interpretation is this is because he did: Walker, Adams and Lugo actually died in the helicopter crash at the start of the game and the rest of the game is Walker's Dying Dream.
Brothers in Arms Hell's Highway starts with the protagonist, Baker and his friend, Hartsock, navigating through an abandoned hospital in the midst of a German attack. Baker gets knocked on the ground by a falling bomb, and Hartsock watches as Baker is seemingly executed in front of him. Cut to the beginning, when they first landed. Turns out that the gunshots of Baker's "execution" were actually him shooting at hallucinations.
The wedding scene that plays during the Attract Mode of Super Paper Mario. Chronologically, that scene occurs during the span of time when Mario is blacked out, after Count Bleck captures Bowser, the Koopa Troop and Luigi partway through the introduction.
A couple of the episodes in Telltale Games' Sam and Max series start out like this. "Night of the Raving Dead" from the second season opens with the duo caught in the antagonists' death trap, following them reminiscing How They Got There. "The Penal Zone" from season three opens with the two already confronting the Big Bad of the episode. In a twist this is not taking place at the present leading into a flashback, but rather a flashforward the present day Sam and Max are watching, leading the two to eventually do their best to bring themselves to the future that was previously being played at the beginning. However, the Dangerously Genre Savvy villain sees the future as well and manages to avert it, meaning the duo must now do things differently to defeat him than in the future vision they originally viewed.
Unlike most previous Sonic the Hedgehog games with a story, Sonic Colors doesn't have a proper opening cutscene; the game throws you into the first two acts of the game, and a cutscene afterwards tells you how Sonic and Tails got to Eggman's amusement park. Heck, this even extends to the gameplay as well, since you don't get to give your file a name and profile until after you complete the first two levels.
The first level of Prototype takes place near the end of the game, so it is simultaneously this and a Taste Of Power.
Dragon Age II starts with Varric being interrogated by Cassandra Pentaghast as she tries to find out about Hawke. The rest of the game is a case of How We Got Here with the Varric-Cassandra interrogation forming a framing device for each new act of the game.
Transistor begins abruptly with Red pulling the titular weapon out of her friend's body and fending off some Processes. Just before the boss fight with Sybil, the game finally flashes back to the attempt on Red's life, the event that kicked off the game's plot just a few minutes before the game actually began.
Of the currently existent Anges Quill stories, all but one use this, starting in the middle of the action late in one case, before wrapping it up and segueing to the one that will be the primary focus of the story. And the overall story also starts in medias res, with Agnes already fairly well-established in her new career — the most important points of how she got there were covered in the Cast page, and further expanded on in supplemental materials included in the book collection.
In Erfworld, we join the story only after the Plaid have lost 10 out of their 11 cites, and there is a slight subversion the very first panel of the very first page shows Erfworld being created. You really can't start a story much earlier then that.
In Tales of the Questor, after a brief diversion from the main story, the reader sees Quentyn in a predicament with no explanation as to what's going on. The author writes "Um, hold on, maybe I should start at the beginning...", and the next strip begins a few days before.
AH.com: The Series first season begins with the characters assembled on the ship, the CF.netters their blood enemies and no explanation for how all of this came to be. This was explained in a series of flashback episodes later on, beginning with the end of season 1 when the Planet Eater that caused the rift between Dr. What and Ward returns.
Kevin: As long as it's not in medias Res. That would be really annoying.
GirlyPart 4 starts in Media Res, with the protagonists trapped in an alien-looking landscape.
Although Next Town Over starts off with a brief flashback and features snippets of flashbacks every so often later on, readers only get a concrete plot In Medias Res with Vane Black hunting down John Henry Hunter for reasons only vaguely hinted at.
The opening scene of 'Cwynhild's Loom involves the title character being stabbed in the chest while asleep on a train.
Chapter 25.4 of Worm opens with Taylor (the at-this-pointnormally-unflappable protagonist) desperately dialing Glenn; the reason only being revealed after she gets off the phone and joins the rest of her superhero team — the Chicago Wards — walking onto the set of a morning chat show.
Demo Reel, "The Blair Witch Hangover", starts off with Tacoma's apology to Donnie. Fans are left thinking he's apologizing for finding out that Donnie doesn't technically exist, but "Blue Patches" reveals it was done much later, after they find out Donnie's mom killed herself.
Code Lyoko: Many episodes begin in the middle of the action on Lyoko. This strongly implies that not all of XANA's attacks are shown, several happening off-screen. There is even one How We Got Here in "Bragging Rights". The show itself starts without a Pilot or Premiere episode; there was no explanation of how Team Lyoko discovered the Supercomputer, programmed their virtual avatar appearances and abilities, or came to meet Aelita, until a two-part prequel in Season 3.
For its first five seasons, the traditional episode of the second Teenage Mutant Ninja Turtles series began like this, showing events from later in the episode alongside a narration explaining the character's thoughts on the situation.
The E/I cartoon Cro had an interesting hybrid for its premiere: the Framing Device, a mammoth talking about the good old days before he was frozen, was of the One We Prepared Earlier type, while the main story started with the Welcome Episode type with Cro meeting up with the mammoths for the first time.
Teen Titans began this way, a surprising rarity for a superhero series. We didn't see a "proper" origin until the fifth season.
Justice League itself also qualifies. Aside from Superman, who had an origin story built into Superman: The Animated Series, and the Martian Manhunter, whose origin is worked into the plot of the first episode, the cast is introduced without backstory and they already know each other (except Wonder Woman). Several episodes within the DCAU have this as well: In Batman's "Dreams in Darkness," we open with Batman suddenly being locked up in Arkham Asylum while "Over the Edge" began with Commissioner Gordon storming the Batcave with Batman and Robin on the run and their identities compromised. Superman had "The Late Mr. Kent," which began with people attending Clark Kent's funeral and its Grand Finale "Legacy" opened with Superman already a Brainwashed and Crazy minion of Darkseid's.
The Simpsons does this regularly. Though the original pilot did feature an opening scene of the family eating breakfast where we get a feel for all their personalities. This was toned down when the episode was turned into the first season finale. In terms of actual stories where this applies, there's "The Telltale Head" which begins with Bart and Homer walking down the street with the head of the statue of Jebediah Springfield, before an angry mob chases them. Cue episode-length flashback.
Samurai Jack had a "proper" origin episode, but there was a special preview episode on Kid's WB before it debuted on Cartoon Network; it would later air as the fourth episode.
The Powerpuff Girls, although the short that creator Craig McCracken initially submitted to Cartoon Network was an origin story that wasn't used due to an inappropriate title ("The Whoop-Ass Girls") and was pretty much the same as the opening. While the opening sequence does introduce the characters quickly, a real origin story doesn't occur until The Movie.
This also happens with the episode "Him Diddle Riddle", as the Girls are already in the middle of solving Him's series of trials.
Spider-Man the Animated Series started out just assuming that everyone knew who Spider-Man was and his backstory. Later we did get a couple things about his past fleshed out, but it wasn't until the third season that we actually saw the entire story of how he got his powers and decided to become a hero.
The 1967 cartoon began similarly. The second season premiere, on the other hand, specifically kicked off with "The Origin of Spider-Man".
Spider-Man and His Amazing Friends went a full season without origins for the titular trio, either individually or as a group; their personal origins were the focus of the three-episode second season, and "The Origin of the Spider-Friends" appeared midway through season three.
Ruby Gloom. Especially noteworthy: Most of the story is told in flashback, and it involves three characters thinking that Ruby is moving out of the house and two others thinking that she's dying. One heck of a first episode for any show!
The "US Acres" shorts in Garfield and Friends begun with all the main players already in their place. While a few episodes showed Orson's life on his old home farm, there's no episode explaining how he came to live in his new home. Likewise, Booker and Sheldon got their origin story made into an episode, but no episode explaining how Orson and friends met Bo and Lanolin was produced.
The first two episodes of SWAT Kats cut straight to the action. It isn't until the introduction of Dark Kat in episode 3 that we learn about the history of the two vigilantes through flashback.
The Transformers opens with Wheeljack and Bumblebee collecting the last few energy sources on their planet, fighting Starscream, and then the Autobots' and Decepticons' voyage to Earth. It took many episodes until some of the backstory was explained.
Phineas and FerbAcross The Second Dimension begins with Phineas, Ferb and Doctor Doofenzmirtz (characters who normally never meet) in chains and about to be killed, while Phineas remarks that he's "having trouble putting a positive spin on this". Then they cut back to earlier that day, explaining how the boys and Doof happened to meet, and the Wacky Hijinks, emotional upheaval and bad-ass fight sequences that ensued. Once they finally catch up to the start, Phineas just fast forwards through his dialog while Ferb notices a sense of deja vu. Also kicks off the episode "Remains of the Platypus"; you'll definitely want to work out how we got to Karl-The-Squirrel-Man, Perry the Butler, Doofenshmirtz partying in his underwear, and the dancing Royal guards.
The Avengers: Earth's Mightiest Heroes begins by skipping over the origin stories of Iron Man, the Incredible Hulk, Ant-Man, and The Wasp, as well as the stories of how The Mighty Thor and Hawkeye became crimefighters. Word of God says the writers assumed that viewers would already know Iron Man's and the Hulk's origins from their respective movies, that Thor's heroic training didn't seem as important to depict as his arrogance and leave from Asgard did, and that detailing how Ant-Man and Wasp got their powers so early on in the series would leave the two of them with less time to impress viewers who never read their comics.
Captain America's introductory episode begins after he became an American icon. However, it does open with a newsreel recounting his origin story, for the convenience of viewers who did not know it.
This trope is averted for Black Panther and Ms. Marvel, whose origin stories occur during the first season instead of before it, and The Vision, whose birth occurs during season two.
Hulk vs. Wolverine begins with Wolverine waking up after getting punched by the Hulk. The short then shows a lengthy flashback of Wolverine getting sent on a mission by Department H to hunt the Hulk, encountering Bruce Banner while searching, and causing Banner to Hulk Out.
Batman: The Brave and the Bold began with Batman having already been active for years, which makes sense since by now, you'd have to be living under a rock to not know his origin story. This was especially helpful in introducing the younger, more diverse crop of legacy heroes, since this meant the writers could start with Jaime Reyes as the Blue Beetle and Ryan Choi as The Atom without having to worry too much about their predecessors (though the prior Blue Beetle and Atom were eventually explained via Flashbacks).
The Johnny Bravo episode "The Day The Earth Didn't Move Around Very Much" has Johnny in court explaining in flashbacks why he behaved the way he did with everyone seemingly frozen in time but him.
A few Adventure Time episodes begin with Finn and Jake in the middle of some adventure of theirs, most notably the season 3 episode "From Bad To Worse" which opens with them, Lady Rainicorn and Lumpy Space Princess escaping from a horde of zombified candy people.
The Flintstones: "The Soft Touchables" starts with Fred and Barney already running a detective agency.
The Fantastic Four (1967) kicks off some time after the Fantastic Four first became superheroes, and after Reed and Sue got married.
The Regular Show episode "Exit 9B" starts with the park already destroyed and everyone other than Mordecai and Rigby brainwashed.
The very first episode of Gravity Falls begins with Dipper and Mabel escaping from a giant monster in a golf cart. Then, we get a flashback to explain how the kids get there.