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Anime and Manga
- Used in Code Geass to show how Lelouch was disowned by the royal family and sent to Japan.
- Slayers: In the first season, Zelgadis has a flashback about when his great-grandfather, the priest Rezo, turned him into a chimera, igniting his Heel–Face Turn.
- In the Guyver OAV, Sho has a nightmare about his fight with Lisker/Guyver 2, and how he subsequently melted/disintegrated.
- In Fullmetal Alchemist, during the Central Library fight between Scar and the homunculi, the camera pans out and shows the glass of the windows shattering as they first start to charge at each other. Later, the fight is shown as part of a nightmare Scar is having, and he wakes up in the Ishvalan refugee camp.
- Happens to the resident angst factory Ken at least twice in Digimon Adventure 02: Once in a flashback to his being infected with the Dark Spore during a Tamer's cameo dream, the other during a Whole Episode Flashback that basically explained his entire rather tear jerking backstory in one go.
- Used in both versions of Chrono Crusade. In the manga, Chrono has two nightmares that hint at his past without fully revealing it—first, a very symbolic dream that mixes a typical nightmare with bits of truth into it, and then a brief flash of a battle that later gets shown in a proper flashback. In the anime, Rosette has a dream about Joshua that starts off normal before turning into a nightmare that symbolically shows how he was kidnapped by the Big Bad. This introduced Joshua before the flashback episode that explained Rosette's backstory.
- Evangeline of Mahou Sensei Negima! conveniently remembers her defeat at the hands of Nagi when Negi spies on her dream. Of course, later revelations about Evangeline's real power level imply that the real battle probably wasn't quite as one-sided as the one in the dream.
- Ciel from Black Butler has a nightmare of him on a table and a shadowed figure with glowing eyes hovering over him. He jerks awake and pulls out a gun from under his pillow and points it at Sebastian who was trying to wake him up. One other instance, although Ciel wasn't asleep, is where he recalls some of his horrific past events while at Baron Kelvin's estate which was set up like the hellish room Ciel had been taken to before he was supposed to be a child sacrifice. He watches as the psycho doctor working with Kelvin stabs a child who had been laid on a table and he recalls more of his own terrifying past. It's so bad that Ciel vomits and drops to his knees. When he looks up reaching out his hand we see the panels flash from the present to his past of him in a cage and masked figures grinning down at him. Sebastian pulls him out of it and reassures him that he's outside of the cage.
- Agito of Magical Girl Lyrical Nanoha receives these in StrikerS a few episodes after she was introduced, showing her life as a lab subject in an illegal research facility before she was rescued by Zest and Lutecia.
- Filicia from Sound of the Sky gets this as part of her package deal as a Shell-Shocked Veteran. She's become a convincing Stepford Smiler to hide it, but doesn't always work.
- In the Tales of Symphonia OAV, Zelos has one of these about his mother's death.
- Heart Catch Pretty Cure plays with this. There's a dream showing Cure Moonlight fighting and losing to Cure Dark. For the other Cures, it's a Call to Adventure. For Yuri, it's this. And boy does she suffer from it.
- In the Saint Beast OVAs, both Goh and Shin have dreams of the war in heaven. These are used as a framing device at the beginning and end of the two episodes. Zeus has a flashback daydream in the middle first OVA as well.
- Guts from Berserk has a few, both of his horrific and abusive past, and later of the Eclipse.
- The entirety of episode 11 of I Can't Understand What My Husband is Saying, which covers Kaoru's adult life before she met Hajime. It's especially noticeable since the rest of the series is a Slice of Life Comedy.
- Happens to Taishou in the beginning of the third issue of Mekko Rarekko and he's pretty disturbed and shocked by it.
- In Hack/Slash, Cassie has a recurring Flashback Nightmare of destroying her undead mother, which she uses to defeat Ashley at their first meeting when he tries to pull a Your Worst Nightmare on her.
- In Empowered, Mindf███ has a recurring Flashback Nightmare of her brother forcing her to cut out her own eyes and tongue, which gets transferred to her girlfriend Sistah Spooky due to telepathic Power Incontinence.
- The Portal 2 fanfiction Blue Sky has plenty of these, mostly from Wheatley remembering his time as a White Collar Worker in Aperture Science. Early on GlaDOS forces Wheatley to relive his worst memory (taking over the Facility, betraying Chell, and pretty much going insane with the need to Test) over and over again via invasive connections into his mind.
- In the Dragon Ball Z fanfic Goku's Wish: The Return of Broly, Broly, while knocked out from exhaustion from being revived, sparring with Goku (whom, thanks to his specifying in his wish towards reviving Broly that Broly won't have any of his negative emotions, Broly no longer hates Goku), and then having to fight Vegeta after the latter grew enraged at Goku's decision to revive him after he was sore about his previous wound to his pride from their last encounter, ends up having a nightmare that initially seemed to be flashbacks to his past where he basically was destroying various galaxies, although it then turned more into a premonition nightmare where apparently a duplicate of Broly mocks the current Broly for his growing "soft" from his revival and proceeds to destroy the Earth before Broly wakes up in shock, and it is implied shortly thereafter that Broly was disturbed at the possibility of a duplicate, or worse, that he still has some evil in his heart that somehow avoided purification before revival. Vegeta, while knocked out, also ended up having a flashback to when he fought Broly on New Planet Vegeta, which was enough to actually reopen his wounds.
- Happy Families Are All Alike, a Naruto/Mahou Sensei Negima! crossover, begins with a flashback to a meeting with the Third Hokage.
- Cadance has one of being captured by Chrysalis in the My Little Pony: Friendship Is Magic fic Honeymoon.
- The Digimon fic A Fading Hope has one of a sort.
- In the Kung Fu Panda AU fic A Different Lesson, a guilt-ridden Tai Lung has one of these near the beginning of the story, a repetition of old dreams about his rampage which has returned to him now that he's truly aware of the magnitude of what he did.
- In the Sherlock Holmes AU fic A Study in Regret, this used several times for poor Holmes.
- Ania is tormented by these towards the end of the The Hunger Games/Axis Powers Hetalia crossover Horrible.
- Introduced in the very first "episode" of Children of Time with the Doctor and continues on to Holmes and Beth in the finale.
- In the My Little Pony: Friendship Is Magic fic Composure, Princess Celestia keeps dreaming of the moment her sister turned evil and tried to kill her.
- In the Harry Potter AU fic series Dangerverse, Harry and Draco have to deal with these after being rescued from their respective "caretakers".
- Used several times for Sherlock Holmes in the fic Mortality.
- Occurs in the Mobile Suit Gundam Wing/Oath of Swords fic Demon of Justice.
- In .hack//G.U. The Staircase to Nowhere, Haseo has a dream where a friend of his commits suicide right in front of him. He admits that it's a memory.
- Ursa has many in the Avatar: The Last Airbender fic Guide Me Home, to the point where she actually finds it "refreshing" to have a normal nightmare.
- In the Ben 10 fic Breaking Point, Ben has nightmares where he thinks he lost his cousin that time he finally killed Vilgax.
- Opening the The Legend of Korra fic Make Me Your Radio is General Iroh awaking from a nightmare where his ships burned around him, bombarded from aircraft above.
- Happens in the Death Note/The House of Night crossover No Hoper.
- Happens in the Death Note AU fic Paladin.
- In the Castlevania/Touhou crossover Prince of Darkness No More, Ivan has these in order to foreshadow Carmilla's return.
- In the Jackie Chan Adventures AU fic Queen of All Oni, Jade has one in the fifth interlude to her torture by Lung.
- Most the younger characters in the Harry Potter Deconstruction Fic Strange And Invisible History. Viktor sometimes dreams of seeing blood and brains on the floor of the British Ministry and Draco has the 'chorus of screams' from the various battles he fought in.
- Talia has one about being assaulted at a party in the The Hunger Games/Axis Powers Hetalia crossover Terrible.
- Topaz has several of these in the Pokémon Special series The Forever Trilogy, and it is mentioned the others do as well.
- In The New Captain N, Bowser's backstory fluctuates back and forth between this, narrative, and his own mind.
- The fates of Ienzo's parents are seen in his nightmares in the Kingdom Hearts fic The Violet Room.
- Prowl has one in the Transformers fic Things We Don't Tell Humans, revealing what happened when he learned that Jazz had died.
- In Zelda III The Secret Of Ganon, much of Link's past is told through his dreams, and helps set up some of the creepier nightmares he later has in the story.
- The Star Trek Online fic Bait and Switch opens in one, telling an incident about ten years earlier when now-Captain Kanril Eleya, then an energy weapons noncom, was nearly killed while helping fight off a Boarding Party. Part of it reappears in chapter nine but ends early when she accidentally punches the person she's in bed with and he shakes her awake.
- Shepard has one where he remembers dying in the Mass Effect fanfic A Star To Steer Her By.
- In chapter 15 of the The Legend of Zelda fanfic Blood and Spirit, Zelda has one about Hylia finding the corpse of the very first Link. She's so traumatized by said dream that she ends up assuming a Troubled Fetal Position for several moments.
- Discussed, ironically enough, in a Flashback in the My Little Pony: Friendship Is Magic fanfic Friendship Is Optimal: Always Say No, when Greg is trying to convince his parents that he isn't suffering from them after his tour in Afghanistan.
- In the Wreck-It Ralph fanfic Ghost Boy, Turbo suffers from Bad Dreams chronically throughout the fic. Many are actually Flashback Nightmare dreams of the time he spent as King Candy.
- Hanyu has one in the first chapter of the Audition Online fanfic Learning From Nightmares.
- In the Final Fantasy VII fanfic Shinra High SOLDIER, Julia has one related to her time as a prostitute and her rape by Jenova-controlled Sephiroth.
- In the My Little Pony: Friendship Is Magic fanfic Sophistication And Betrayal, the protagonist often dreams of the disaster that transported him to Equestria, and his near-drowning in the process.
- The Lilo & Stitch/Star Trek crossover Starlight starts off with Lilo dreaming about the car crash that kills her parents. A few chapters later, Nani dreams about the day she received the phone call telling her of the outcome.
- In the Star Trek fanfic Memories Born Of Fire, Spock has multiple nightmares about the kal-i-fee in which Kirk does not survive.
- In the Portal 2 fanfic Target Acquired, Wheatley has one of the core transfer scene, except he doesn't realize it's a flashback, but thinks Chell is forcing him to go through the core transfer all over again.
- Siren has one in the My Little Pony: Friendship Is Magic/BioShock fanfic Vision.
- Kyoshi Rising has a variation in Chapter 9; it isn't Kyoshi remembering a traumatic experience in her own life, but instead she witnesses Avatar Yangchen executing fifty Waterbenders who had opposed her (she sees this through Yangchen's eyes, and only later learns it was something the earlier Avatar did).
- In Pokemon Black & White: Tale of a Legend, Thrin dreams of the time her friends dared her to go into the forest north of Lacunosa Town, where she ran afoul of Kyurem.
Films — Animated
- In Lilo & Stitch, Lilo thinks Stitch is having these about his parents.
Lilo: I hear you cry at night. Do you dream about them?
- A deleted scene in The Iron Giant had the Giant broadcasting his memories onto Dean's TV in his sleep, showing the Giant and other robots like him laying siege to an alien civilization.
- The Lion King II: Simba's Pride has Simba remembering Mufasa's death, with Scar preventing him from saving his father. Once Mufasa falls, Scar morphs into Kovu, who then proceeds to toss Simba from the cliff.
Films — Live-Action
- The Blind Side: Michael occasionally has the awake version of these, when thinking about his Dark and Troubled Past.
- The opening of Batman Begins.
- The opening of the Mortal Kombat movie.
- At the beginning of the film version of The Two Towers, Frodo has a dream that reminds us what happened to Gandalf, although in this case it continues into a sequence which he couldn't possibly have seen.
- The villain actually has one in Maniac Cop, dreaming about his mutilation in Sing Sing by inmates he put there.
- In The Terminator, Kyle Reese frequently had nightmares relating to the war against Skynet as well as his hiding from the various HKs and Terminators.
- Implied in one scene of X-Men Origins: Wolverine with Wolverine where he is screaming in bed and apparently accidentally injured Fox with his (regular) claws, where he explained that he had nightmares on every single war he fought in.
- The Bourne Supremacy begins with one, with the amnesiac Jason Bourne having a nightmare about a hitherto forgotten assassination mission in Berlin.
- Eugenides of The Queen's Thief is often woken screaming from nightmares of the Queen of Attolia, the woman who cut off his right hand and is also his wife.
- One of the favorite tropes of Animorphs. Hardly a surprise, considering what they had been through.
- Harry Potter mostly had semi-prophetic and psychological dreams, but Harry Potter and the Order of the Phoenix mentioned that his experience in the graveyard in the previous book had supplied a few of these.
- Scott from The Power of Five had several of these, after a nice spell of Mind Rape and Cold-Blooded Torture.
- In Dark Life, Ty has one of these about his time as a medical research subject.
- Eve has these constantly in the In Death series.
- As she finally begins to deal with her issues her dreams become more surreal, but rarely any less disturbing.
- In the novel Ordinary People, Conrad Jarrett has some of his flashbacks to the sailing accident that killed his older brother, during which we gradually learn more about it, while asleep.
- A Brother's Price: Ren dreams sometimes about the moments before - and just after - a theater exploded. Sometimes they're Anxiety Dreams and details are mixed around, new characters added, but other times they're pretty true to life.
- Katniss and Peeta have them after being in The Hunger Games, but even before that Katniss had ones about her dad dying in the mine explosion.
- In Warrior Cats, Dovepaw has one about Rippletail's death in Fading Echoes.
- In Vampire Academy, Lissa has nightmares of the accident that killed her parents and brother. "Fire and blood, the smell of smoke, the twisted metal of a car."
Live Action TV
- Buffy the Vampire Slayer: Part of the Slayer package is flashbacks to battles of other Slayers in the form of nightmares. Angel Season 5 shows what happens when a crazy person gets them.
- Lost: some of the show's characteristic flashbacks are presented as nightmares. One example is Sawyer's flashback in "Outlaws" to his father killing his mother, then himself.
- The 2010 season of Home and Away started out with Hugo kidnapping Charlie, meaning these formed a part of her arc for the first few weeks.
- Maddigan's Quest used this to illustrate Timon and Eden's backstory, in particular their parents' execution and the boys' subsequent escape from the future Solis.
- In the first part of the Monk two parter Mr. Monk Is On the Run, Monk experiences a nightmare of the day Trudy was killed via car bomb, and he couldn't stop it. It was also implied in the same two parter that these nightmares were frequent.
- In The X-Files, Mulder often has flashback nightmares of his sister's abduction. It may explain his insomnia. It stands out particularly in the episode "Paper Hearts".
- In Sherlock, John gets one of these in the first episode, about when he got shot in Afghanistan. It's also likely he's having them again after the latest.
- Parodied in Nebulous, where Nebulous often has horrific flashbacks to his childhood - working in the circus.
- The Changelings of Changeling: The Lost suffer from flashbacks to their durance in Arcadia in their dreams. One downside to gaining Wyrd is that these dreams become clearer and more powerful, until eventually they can recall Arcadia with absolute clarity - and their own Clarity suffers as a result, driving them closer to losing their grip on reality entirely and, at extremely high Wyrd, potentially becoming True Fae themselves.
- Ashley of Another Code has the events of her third birthday come in a dream near the start of both games. Then again, seeing your mom get shot to death tends to be hard to forget.
- Shadow had some in Final Fantasy VI, revealing that he was a train robber named Clyde who couldn't Mercy Kill his wounded partner and spent the rest of his life regretting it. They also underline the implication that he is Relm's Disappeared Dad. Since the nightmares appear at a very low chance when staying in inns, and even then only if you knew to save his life at the Floating Continent, many players don't even know of their existence.
- Terra had something similar in the same game: Shortly after she attempts to escape from Narshe (while amnesiac), and ends up falling down the Narshe Caves, she passes out and then a flashback occurs where it is revealed that she was unwillingly subjected to being outfitted with a Slave Crown by Kefka Palazzo, leaving her brainwashed, and then killing over fifty imperial soldiers completely against her will with Kefka cheering her to continue burning them to a crisp, and then witnessing Emperor Gestahl's war speech, a flashback that would certainly have been very horrifying.
- In Metal Gear Solid 4, when Old Snake finds out he has to return to Shadow Moses Island, the setting of the first Metal Gear Solid, he has a playable nightmare flashback complete with PS1 graphics.
- It is implied in Metal Gear 2 that Solid Snake frequently experienced nightmares relating to his mission in Outer Heaven.
- The severity of Raiden's nightmares about his Child Soldier past is the main reason he won't allow people (like Rosemary) to stay with him when he sleeps because he's afraid of hurting them.
- Marshall Anderson of Outlaws has a recurring nightmare of the man who shot his father, and left him for dead. The nightmare repeats a few times before we finally see the entire scene, and the villain's face is revealed. It isn't until the final confrontation between Anderson and Bob Graham, that we see a Match Cut of Graham and the assailant that we find out that the two characters are one and the same. Que mandatory one-liner.
- Zero has one of these at the start of Mega Man X4, and it is also implied that this wasn't the first time he had the nightmare.
- Super Robot Wars Z2: Hakai-Hen had Chirico Cuvie experiencing one during the prologue of Scenario 39. It was about the final battle he had with the Barcoff Squadron and it showed how he was sad at the loss of their lives.
- In Tales of Symphonia: Dawn of the New World, Emil dreams of Richter killing him.
- In Super Robot Wars MX, Hugo has a nightmare/flashback of the final moments he had with the Cry Wolves. After failing to neutralize the Devil Gundam, the Cry Wolves are taken out one by one. Alberto's son Foglia is turned into a zombie by the Devil Gundam and Hugo tries to reason with Foglia but ultimately gets his Gespenst blown up.
- Emma gets these in Telepath Tactics, to her childhood as a slave in the vibra mines. They are easily among the most chilling scenes in the story.
- Riki of Little Busters! has been having recurring nightmares since recently as of the beginning of the game, though it isn't until later that we find out what they're of, and it isn't until much later that we find out that they are this trope. Specifically, memories of an event that have been repressed when he's awake as long as he exists in the created world.
- Kei of Akai Ito gets nightmares of things taking place in the past, including the last days of Sakuya's people.
- Happens in Songs Of Araiah, where Jason has dreams in which he remembers seeing the execution of his best friend by the Reformists
- The regular story chapters of the Visual Novel Planetarian are interspersed with "The Junker's Dream" chapters, which describe the main character's flashback nightmares of his past as a child soldier.
- Susan of El Goonish Shive has one of finding out about her father's affair.
- Sarine Elle, central figure in Errant Story, has a real honker of a flashback nightmare about the disastrous birth of her stillborn daughter, which goes far toward explaining her relationship with Meji Hinadori.
- Jade's second dream in Homestuck after her dreamself's death ends up being this, though to be fair, Jade was going off the rails and Feferi (who had died) probably didn't mean to startle her. She's just kind of weird like that.
- In general Sburb players with dead dream selves experience flashbacks in their dreams, though they are not nightmares most of the time.
- Vashiel gets a couple of these in Misfile.
- Leading to some fans to label him a mass murderer.
- Vaarsuvius from The Order of the Stick gets flashback nightmares of a certain traumatic experience he/she suffered months earlier. To make it worse, trancing, the equivalent of sleep for elves, actually consists of reviewing memories in minute detail for the sake of self-reflection and committing those events to very long-term memory. This makes V's Flashback Nightmares far more literal than any regular example and handily explains V's reluctance to trance.
- The seedlings from morphE get a fully animated one in the second chapter which hints to the traumas they each suffered when in captivity. A second has been made which includes one of the captives waking up and being discovered by the knife-wielding woman from the prologue.
- Terra introduces Alexis Hawke in her nightmare of being captured and enslaved by the Shadow Cabal during the Titan Colony massacre, then segues into the present day when she wakes up.
- Played with in Broken Saints, for each of the heroes' Dark and Troubled Pasts.
- In the beginning of the fifth episode of Super Mario Bros. Z, Sonic is experiencing a nightmare harkening back to the day when Mecha Sonic mercilessly slaughtered his friends, and pretty much every single inhabitant of Planet Mobius while torching a large portion of the planet, while Sonic was knocked out from his fight with the Koopa Bros.
- In Exo Squad, Lt. Marsh dreams about Alice Noretti's death, the newest member of his squad who was killed on her very first mission, and it is implied that he has such nightmares quite often but hides it from everyone.
- In the very first episode of Avatar: The Last Airbender, Aang has one of these about the horrible storm that nearly killed him and led to him becoming a Human Popsicle.
- In the South Park episode "Toilet Paper", Kyle gets flashback nightmares after toilet papering a teacher's house.
- This can and does happen to people with Post-Traumatic Stress Disorder, including but not limited to combat veterans. While not always in dreams, reliving the traumatic experience in high detail is literally known as a "flashback".
- People who have experimented heavily in psychotropic drugs also have flashbacks to previous trips.