-->-- '''River Song'''

''Series/DoctorWho'' is full of {{Noodle Incident}}s, what with the main character being an InexplicablyAwesome alien who even their closest friends only know by a title.
! General Examples:
* We don't know how the Doctor and the Master went from school chums to frenemies.
* What led him to steal the TARDIS (other than general wanderlust)? There were "pressing reasons at the time", apparently, but good luck getting him to admit what they were. Series 9 established that he ran away out of fear, but what that fear was - whether it was due to the prophecy of the Hybrid or something else - is still a mystery.
* The Doctor's original family. Susan's the only (confirmed) one we've seen; what about the others? Does it have anything to do with why he left Gallifrey in the first place?
* The Doctor frequently references various events in Earth's timeline, such as the "Twelfth British Empire", "The Nineteenth Reich", and several future World Wars.
* We also never got to see other incarnations of the Master before the 13th Incarnation (except for his first incarnation in a flashback).

!Classic Series:
!!First Doctor:
* An early example is from "[[Recap/DoctorWhoS1E3TheEdgeofDestruction The Edge of Destruction]]". Susan recognises a photograph on the screen as Quinnis, a planet in the fourth universe where they nearly lost the TARDIS. As revealed in the [[AudioPlay/BigFinishDoctorWho Big Finish]] story "Quinnis", [[spoiler:it was almost carried away by a flood when the Doctor was posing as a rainmaker]].
* He says Gilbert and Sullivan told him he looked better in a cape.
* Two in "[[Recap/DoctorWhoS2E4TheRomans The Romans]]":
** The Doctor mentions that this isn't his first visit to Rome.
** He also boasts of having once trained "the Mountain Mauler of Montana".

!!Second Doctor:
* The Cyber-Planner in "[[Recap/DoctorWhoS6E3TheInvasion The Invasion]]" tells Vaughn that he recognizes the Doctor and Jamie from Planet 14, a event we never saw.
* In "[[Recap/DoctorWho20thASTheFiveDoctors The Five Doctors]]", the Doctor, reminiscing with [[TheBrigadier Brigadier Lethbridge-Stewart]], refers to an unseen adventure the two shared with the Terrible Zodin and something "that used to hop like kangaroos". Although only referred to once again in the series itself (in "[[Recap/DoctorWhoS22E1AttackOfTheCybermen Attack of the Cybermen]]"), FanFic and the ExpandedUniverse have frequently played with what Zodin could be, with everything from an evil MonsterOfTheWeek to a terrible meal the Doctor once had being suggested.

!!Third Doctor:
* Similar to Zodin, there been several explanations outside the TV series about what the Perigosto Stick the Doctor mentions in "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]". You can't trust a Venusian Shanghorn with one, you see.
* In "[[Recap/DoctorWhoS11E5PlanetOfTheSpiders Planet of the Spiders]]", it's mentioned that the Brigadier once somehow earned the gratitude of a woman named Doris. In "[[Recap/DoctorWhoS26E1Battlefield Battlefield]]", it's revealed "she finally caught him" and they are now married. (A comic explains this.)
* The "daisiest daisy" monologue in "[[Recap/DoctorWhoS9E5TheTimeMonster The Time Monster]]" is an extremely rare glimpse into the Doctor's childhood on Gallifrey (a house halfway up a mountain, near where an old hermit lived under the tree). The events he describes took place on 'the blackest day of my life' - but he never actually mentions ''why'' he felt so depressed. As of "[[Recap/DoctorWhoS34E4Listen Listen]]", however, we ''may'' have been given a clue -- [[spoiler:fear of being forced to join the army, since no one thought he'd make a Time Lord.]]

!!Fourth Doctor:
* In "[[Recap/DoctorWhoS15E4TheSunMakers The Sun Makers]]", the PA announces that the Gatherer has offered 5,000 telmars for the Doctor's capture. A couple of workers marvel at this, until the Doctor (who's been standing behind them) scoffs, "Peanuts! The Droge of the Gabriellides once offered an entire star system for my head!"
* The Doctor's already quite familiar with Leonardo da Vinci when he goes back in time to meet him in "[[Recap/DoctorWhoS17E2CityOfDeath City of Death]]".

!!Fifth Doctor
* For the entirety of his tenure, the Doctor wears a stalk of celery on his left lapel, pinning it on in "[[Recap/DoctorWhoS19E1Castrovalva Castrovalva]]". In his final serial, "[[Recap/DoctorWhoS21E6TheCavesOfAndrozani The Caves of Androzani]]", we learn this incarnation suffers allergies from Praxis gasses in star systems. If he comes in range of these gases, the celery turns purple and he eats its to (presumably) act as an immunity booster to the allergens. However, we never see this happen on screen, because this was a last minute explanation written in to justify his habit of pinning the celery to his clothing.

!!Sixth Doctor:
* There's a humourous example from "[[Recap/DoctorWhoS22E2VengeanceOnVaros Vengeance on Varos]]":
-->'''Peri:''' You even managed to burn dinner last night!\\
'''The Doctor:''' I never said I was ''perfect!''\\
'''Peri:''' If you recall, I was going to have a cold dinner last night.
* "[[Recap/DoctorWhoS22E5Timelash Timelash]]" references an unbroadcast adventure the Third Doctor and Jo Grant had on the same planet.

!!Seventh Doctor:
* His worryingly-throwaway line about the Hand of Omega in "[[Recap/DoctorWhoS25E1RemembranceOfTheDaleks Remembrance of the Daleks]]" -- "...and didn't we have trouble with the prototype..."

!!Eighth Doctor
* He and the Master indicate a half-human side with this new incarnation. Writing-wise, this bold move is so much of a ContinuitySnarl people try to HandWave it or ignore it altogether. The Doctor has been portrayed as pure Time Lord ever since their introduction in "The War Games". WordOfGod says if the movie got a series, it would be explained... ''somehow.''
* The Doctor knew Madame Curie... ''intimately.''
* [[InvokedTrope Invoked]] by the Master, who implies a terrible backstory for the Doctor to convince Chang Lee to work with him.
-->'''The Master:''' Genghis Khan?\\
'''Chang:''' What about him?\\
'''The Master:''' That ''was'' him!\\
'''Chang:''' No way!\\
'''The Master:''' Yes way.
* The Eighth Doctor was also fond of using RetroactivePrecognition to create these, alluding to other characters' future deeds.
* In "The Chimes of Midnight", the Eighth Doctor says he and Charley found an original copy of Oliver Twist.
* In "The Sontaran Ordeal", the Doctor mentions having trained with the legendary swordsman Miyamoto Musashi.

!New Series:
* The Creator/StevenMoffat era has made Noodle Incidents a RunningGag.
* The Time War that destroyed Gallifrey and ([[JokerImmunity supposedly]]) the Daleks was treated in this fashion for eight years; we were given lots of intriguing hints and abstract reveals as to what happened and who did what (with mentions of the Fall of Arcadia and the burning of the Cruciform -- neither of which were seen in the series -- and it being stated in "[[Recap/DoctorWhoS27E6Dalek Dalek]]" that the Doctor had no choice but to do the deed himself), but we didn't see what actually occurred, though "[[Recap/DoctorWhoS30E17E18TheEndOfTime The End of Time]]" explains some of it. The Fiftieth Anniversary special "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]" finally revealed more of the backstory, including the Fall of Arcadia, but other parts such as the burning of the Cruciform remain unexplained.

!!Series 1
* "[[Recap/DoctorWhoS27E1Rose Rose]]":
** Clive's various pictures show the Doctor visiting JFK's assassination and the 1883 eruption of Krakatoa. He also prevented a family from taking the ''[[UsefulNotes/RMSTitanic Titanic]]''. A line in the next episode makes it clear he also went on the ship himself, and ended up "clinging to an iceberg".
** The Doctor mentions (about the TARDIS' doors) that "The assembled hordes of Genghis Khan couldn't get through those doors, and believe me they've tried."
* "[[Recap/DoctorWhoS27E3TheUnquietDead The Unquiet Dead]]": Apparently, the Doctor pushed boxes at [[UsefulNotes/TheAmericanRevolution the Boston Tea Party]] and fought in [[WorldWarWhatever World War V]].
* "[[Recap/DoctorWhoS27E9TheEmptyChild The Empty Child]]"/"[[Recap/DoctorWhoS27E10TheDoctorDances The Doctor Dances]]":
** The Doctor apparently blew up the weapon factories at Villengard that made Jack's squareness gun. And, somehow, contrived to get them replaced with a banana grove.
** The last time Jack was sentenced to death, he ordered four [[GargleBlaster Hyper Vodkas]] and woke up in bed with both of his executioners, who stayed in touch.
** Jack also has his own personal Noodle Incident: the two years of memories the Time Agency erased.
* "[[Recap/DoctorWhoS27E11BoomTown Boom Town]]":
** We see Jack telling a story about fifteen naked Time Agents running from something with tusks, ending with the punchline "I told you we should have turned left!" (A phrase which takes on a deeper meaning a couple of series later, quite possibly on purpose, given the trend for significant words and phrases throughout the new series.)
** Rose tells Mickey about a trip she and the Doctor took to the planet Woman Wept.
* "[[Recap/DoctorWhoS27E12BadWolf Bad Wolf]]": The Doctor, while telling Lynda what happened before he, Rose and Jack were transmatted to the Gamestation, mentions that they had just "escaped" from 1336 Kyoto, where they'd gone after dropping off Egg Margaret at Raxacoricofallapatorius.

!!Series 2
* [[Recap/DoctorWho2005CiNSDoctorWhoChildrenInNeed Children in Need Special]]: While trying to convince Rose of his identity, the Tenth Doctor mentions a time where she and the Ninth Doctor were "hopping for [their] lives".
* "[[Recap/DoctorWhoS28E2ToothAndClaw Tooth and Claw]]": The Doctor apparently helped [[https://en.wikipedia.org/wiki/Skylab Skylab]] fall to Earth, and nearly lost his thumb in the process.
* "[[Recap/DoctorWhoS28E5RiseOfTheCybermen Rise of the Cybermen]]": At the beginning of the episode, the Doctor and Rose are reminiscing about some incident on an asteroid bazaar involving a fire-breathing alien woman.
* "[[Recap/DoctorWhoS28E8TheImpossiblePlanet The Impossible Planet]]"/"[[Recap/DoctorWhoS28E9TheSatanPit The Satan Pit]]": It's PlayedForDrama -- the Beast, claiming to be the Devil, taunts the base crew with snippets of their pasts. Mr. Jefferson, the security officer, apparently did something his wife never forgave him for. Danny Bartok, the Ood handler, is called "the little boy who lied". Finally, Ida Scott, chief science officer, is "running from [[AbusiveParents daddy]]". (The secrets the other characters are taunted with are not noodle incidents.)
* "[[Recap/DoctorWhoS28E10LoveAndMonsters Love & Monsters]]":
** The Doctor and Rose are seen chasing a Hoix in a disused factory, and there's two buckets containing mysterious liquids.
** Ursula's blog has a picture of the Doctor taken at Trafalgar Square after the events of "[[Recap/DoctorWho2005CSTheChristmasInvasion The Christmas Invasion]]". We don't know exactly what he was doing there.
** When Elton was a child, the Doctor apparently tracked an [[LivingShadow Elemental Shade]] to his house and killed it, but not before it killed Elton's mother.
* "[[Recap/DoctorWhoS28E12ArmyOfGhosts Army of Ghosts]]": During the opening montage, the Doctor and Rose are seen standing on a rocky beach watching pterodactyl-esque creatures flying around.
* "[[Recap/DoctorWhoS28E13Doomsday Doomsday]]": The Doctor says he was at the [[Recap/DoctorWho50thASTheDayOfTheDoctor "fall of Arcadia"]], during the Time War.

!!Series 3
* "[[Recap/DoctorWhoS29E1SmithAndJones Smith and Jones]]": Apparently, Emmeline Pankhurst stole the Doctor's laser spanner, cheeky woman!
* "[[Recap/DoctorWhoS29E2TheShakespeareCode The Shakespeare Code]]": At the end, Queen Elizabeth I shows up, recognizes the Doctor, declares that he's her "sworn enemy", and sends the guards after him, forcing him and Martha to leg it back to the TARDIS. The Doctor says he [[HaveWeMetYet can't wait to find out]] what he did.
** Eventually, "[[Recap/DoctorWhoS30E17E18TheEndOfTime The End of Time]]" and "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]" cleared it up: he married her.
* "[[Recap/DoctorWhoS29E6TheLazarusExperiment The Lazarus Experiment]]":
** The Doctor comments that whenever he wears his tuxedo, something bad always happens. The only previous time the Tenth Doctor had ever been seen wearing a tux onscreen was in "[[Recap/DoctorWhoS28E5RiseOfTheCybermen Rise of the Cybermen]]"/"[[Recap/DoctorWhoS28E6TheAgeOfSteel The Age of Steel]]" -- and although something bad ''did'' happen then, one incident doesn't seem like enough to develop an opinion like that.
** The Doctor says he's seen something like Lazarus' tech before. His wording strongly implies that what Lazarus did isn't that far off from regeneration.
* "[[Recap/DoctorWhoS29E8HumanNature Human Nature]]": We don't know what the Doctor and Martha were doing when they were attacked by the Family of Blood. According to Martha's CharacterBlog, they were visiting the 2007 Eurovision (as in the one that got the actual episode delayed).
* "[[Recap/DoctorWhoS29E10Blink Blink]]":
** The ending includes some intriguing reasoning for why the Doctor can't stay long.
--->'''The Doctor:''' Got to go, got a sort of ... thing ... happening. Well, four things. Well, four things ... and a lizard.
** Martha also mentions a "hatching" taking place in 20 minutes. Also, she's carrying a quiver of arrows, and the Doctor's carrying a bow.
** Relatedly, the Doctor saying he's "rubbish at weddings", especially his own. And this is ''before'' the Queen Elizabeth I incident!
** We also don't know how the Doctor and Martha got sent back in time by the Angels.
* "[[Recap/DoctorWhoS29E12TheSoundOfDrums The Sound of Drums]]": The Master says he ran from the Time War after "that Dalek Emperor took control of the Cruciform." The only thing we know is that it ''isn't'' the Crucible from the series 4 finale, and that given the Master practically never shows fear to begin with it must have been ''bad''.
* "[[Recap/DoctorWhoS29E13LastOfTheTimeLords Last of the Time Lords]]": Martha's exploits during the Year That Never Was, including crossing the "radiation pits of Europe", walking across North America on foot, seeing the "ruins of New York", and being the only person to escape from the islands of Japan when they burned.
** The short story collection ''The Song of Martha'' expands on this.

!!Series 4
* "[[Recap/DoctorWho2007CSVoyageOfTheDamned Voyage of the Damned]]": The Doctor claims that on the very first Christmas, ''he'' got the last room at the inn.
* "[[Recap/DoctorWhoS30E2TheFiresOfPompeii The Fires of Pompeii]]":
** Upon finding they're in what looks like ancient Rome (and before they find out they've landed in Pompeii instead), the Doctor tells Donna, "And before you ask, that fire had nothing to do with me," referring to the great fire of AD 64 and the First Doctor serial "[[Recap/DoctorWhoS2E4TheRomans The Romans]]".
** He also informs the Sybilline priestesses that he met the Sybil, and she was an excellent dancer.
* "[[Recap/DoctorWhoS30E7TheUnicornAndTheWasp The Unicorn and the Wasp]]": The Doctor mentions an incident where he was "in the Ardennes, looking for Charlemagne. He'd been kidnapped by an insane computer." This is accompanied by a flashback of the Doctor carrying a bow and arrows while using a machete to hack his way through underbrush.
* "[[Recap/DoctorWhoS30E8SilenceInTheLibrary Silence in the Library]]"/"[[Recap/DoctorWhoS30E9ForestOfTheDead Forest of the Dead]]": River Song mentions several, since she knows the Doctor in his future. Namely:
** "Ooh, picnic at Asgard. Have we done Asgard yet?"
** "[[Recap/DoctorWhoS31E4TheTimeOfAngels Crash of the]] ''[[Recap/DoctorWhoS31E5FleshAndStone Byzantium]]'', have we done that yet?"
** She mentions that the Doctor [[Recap/DoctorWho2015CSTheHusbandsOfRiverSong gave her her screwdriver]].
** "I'll trust that man to the end of the universe. [[Recap/DoctorWhoS31E12ThePandoricaOpens And actually,]] ''[[Recap/DoctorWhoS31E13TheBigBang we've been!]]''"
** She mentions she's seen armies run away at the sight of the Doctor.
** Several of them are no longer noodle incidents, however.
* "[[Recap/DoctorWhoS30E12TheStolenEarth The Stolen Earth]]": Apparently, during the Time War, Davros "died" when his command ship "flew into the jaws of the [[EldritchAbomination Nightmare Child]]".
* "[[Recap/DoctorWhoS30E15PlanetOfTheDead Planet of the Dead]]": The Doctor knows what ''really'' happened at the first Easter.
* "[[Recap/DoctorWhoS30E16TheWatersOfMars The Waters of Mars]]": Ed Gold did something for which Adelaide Brooke "never could forgive" him. Creator/RussellTDavies says in the background interviews that he likes hinting at this mystery that will never be solved.
* "[[Recap/DoctorWhoS30E17E18TheEndOfTime The End of Time]]":
** Why is the TARDIS depicted in one of the stained glass windows of the church at the beginning? The Woman in White tells Wilf that the Doctor defeated an alien of some kind that attacked the abbey at that location in the Middle Ages.
** Upon arriving on the Oodsphere, the Doctor tells Ood Sigma what he's been up to recently: He saved a planet from the Red Carnivorous Horde, named a galaxy Allison and [[Recap/DoctorWho50thASTheDayOfTheDoctor got married]] to Queen Elizabeth I.
** The Doctor references a number of monsters/weapons that fought in the Time War. The names he drops are the Nightmare Child, the Skaro Degradations, the Horde of Travesties, and the Could've Been King and his army of Meanwhiles and Never Weres. The implication is that each is some kind of EldritchAbomination but we're never given any indication what they were or what side (if any) they each fought on. Even when the Time War is shown in "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]", none of them appear. The only other thing we know is that since Davros's command ship flew into its jaws, the Nightmare Child must've been '''massive'''. The book ''[[Recap/NewSeriesAdventuresEnginesOfWar Engines of War]]'', which centered on the [[spoiler:War Doctor]] gave information on the Skaro Degradations. They were Dalek forces with abnormal and malformed appearances created by the Daleks during experiments to retro-evolve the Dalek genome.

!!Series 5
* "[[Recap/DoctorWhoS31E2TheBeastBelow The Beast Below]]": Liz 10 mentions a few of the Doctor's relationships with past British monarchs, namely that he's an old drinking buddy of Henry XII, and, of course: "And so much for [[Recap/DoctorWhoS29E2TheShakespeareCode the]] [[Recap/DoctorWhoS30E17E18TheEndOfTime Virgin]] [[Recap/DoctorWho50thASTheDayOfTheDoctor Queen]], you bad, bad boy!"
* "[[Recap/DoctorWhoS31E3VictoryOfTheDaleks Victory of the Daleks]]": The Doctor knows UsefulNotes/WinstonChurchill quite well. It's implied that Churchill's met at least two incarnations before Eleven, if his line about "changing [his] face ''again''" is any indication. Indeed, numerous encounters between Churchill and the Doctor have been depicted in the expanded universe, both in prose and on audio.
* "[[Recap/DoctorWhoS31E4TheTimeOfAngels The Time of Angels]]":
** The Doctor's demeanour for the first part of the episode ''strongly'' suggests that he's had several offscreen run-ins with Doctor/Professor River Song since her previous appearance, and that the most recent one from his perspective may have ended somewhat disastrously.
** River, checking her diary: "Have we done the Bone Meadows?"
* "[[Recap/DoctorWhoS31E6TheVampiresOfVenice The Vampires of Venice]]":
** When the Doctor [[JumpingOutOfACake bursts out of the cake]] at Rory's stag party and spots him:
--->'''The Doctor:''' That's a relief, I thought I burst out of the wrong cake. ''[{{beat}}]'' Again.
** There is an appropriately brief mention of one.
--->'''The Doctor:''' That's okay, 1580. Casanova doesn't get born for 145 years. Don't want to run into him. I owe him a chicken.\\
'''Rory:''' You owe Casanova a chicken?\\
'''The Doctor:''' ''[briskly]'' Long story, we had a bet.
** Even funnier if you know David Tennant (10th Doctor) has played Casanova...
* "[[Recap/DoctorWhoS31E10VincentAndTheDoctor Vincent and the Doctor]]": Apparently the Doctor took Amy to the Hanging Gardens of Babylon.
* "[[Recap/DoctorWhoS31E13TheBigBang The Big Bang]]":
** Eleven has to [[spoiler:unlive his whole life as the universe prepares to restart itself, thereby erasing him from existence]]. He sees Amy and his earlier self in the TARDIS, Amy agape about "Space Florida" and its "automatic sand".
** '''[[FanFicFuel What the CRAP did]] [[spoiler:[[FanFicFuel Auton-]]]][[FanFicFuel Rory]] ''[[FanFicFuel DO]]'' [[FanFicFuel during those 2000 years?!]]'''
*** According to Rory, he kept out of trouble. Unsuccessfully.
** At the end of the episode, the Doctor gets a phone call on the TARDIS.
--->'''The Doctor:''' An Egyptian goddess? Loose on [[Recap/DoctorWhoS34E8MummyOnTheOrientExpress the Orient Express... in space?]] Don't worry about a thing, Your Majesty. We're on our way!

!!Series 6
* "[[Recap/DoctorWho2010CSAChristmasCarol A Christmas Carol]]":
** Apparently the Doctor partied with SantaClaus (AKA "Jeff") and UsefulNotes/AlbertEinstein at Frank Sinatra's hunting lodge in the 1950s, and he has a photo to prove it.
** The Doctor accidentally got engaged to Creator/MarilynMonroe in 1952.
** Also, there is apparently a moon made of honey. Except it's not actual honey, nor is it a moon. It's also technically alive and a bit carnivorous.
* "[[Recap/DoctorWhoS32E1TheImpossibleAstronaut The Impossible Astronaut]]":
** The episode begins with a montage of some adventures the Doctor's had recently, including getting ''involved'' with the wife of a 17[[superscript:th]]-century cavalier, leading a jailbreak in World War II and invading a Creator/LaurelAndHardy movie.
** The Stormcage guards' reactions make it clear River's broken out before, after "packing".
** River and the Doctor check their journals to see where they are in their timelines. Mention is made of a visit to Easter Island and "Jim the Fish", who is apparently "still building his dam". [[spoiler:The second one becomes something of a ChekhovsGun when the Doctor reappears later, and River uses his ignorance of the incident to deduce that he's younger than the Doctor from earlier.]]
* "[[Recap/DoctorWhoS32E2DayOfTheMoon Day of the Moon]]": It's been [[TimeSkip three months]] since the previous episode, and our heroes have scouted the entire United States. So, how'd the Doctor get imprisoned in Area51 and sneak the TARDIS there -- and why was Rory at a dam? And why was River wearing an evening gown?
* "[[Recap/DoctorWhoS32E4TheDoctorsWife The Doctor's Wife]]": The first scene on the TARDIS involves the Doctor finishing recounting a previous adventure: "And then it turned out it wasn't the robot king after all. Fortunately I was able to reattach the head." The only thing we know about this one is that Rory wasn't travelling with them at the time.
* "[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]":
--->'''The Doctor:''' [[ItMakesSenseInContext I've got to get to that cockerel before all hell breaks loose!]] Ooh, never thought I'd get to say that [[ARareSentence again]]!
* "[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]": The Doctor once plugged his brain into an entire planet to halt it in its orbit to win a bet.
* "[[Recap/DoctorWhoS32E7AGoodManGoesToWar A Good Man Goes to War]]":
** We don't know exactly how or when Amy was replaced with a Flesh avatar.
** Madame Vastra makes her entrance having just killed and eaten Jack the Ripper.
** Whatever incident caused Strax to be made a CombatMedic to restore the honour of his clone batch.
** Whatever the Doctor [[TimeTravelTenseTrouble did/will do]] at the Gamma Forest was so awesome that it caused the people there to see his name as meaning "Great Warrior".
** When Rory arrives at Stormcage to fetch River, she tells him that she's just returned from a birthday outing with the Doctor, which involved Stevie Wonder playing at a frost fair in 1814, London, "But you must never tell him."
** Less than a minute later, we get this gem:
--->'''Rory:''' I've come from the Doctor too.\\
'''River:''' Yes, but at a different point in time.\\
'''Rory:''' Unless there's two of them.\\
'''River:''' Now, that's a whole different birthday.
*** This could be LeaningOnTheFourthWall since ''Doctor Who'' anniversaries are frequently celebrated with multi-Doctor stories.
** Vastra says that she met the Doctor because she'd been trying to avenge the deaths of her sisters on innocent tunnel-diggers in the London Underground, and he persuaded her to stop.
* "[[Recap/DoctorWhoS32E8LetsKillHitler Let's Kill Hitler]]":
** On one of the Teselecta's past missions it had to impersonate Rasputin -- with green skin.
** One of the Teselecta's crew on TemporalMutability: "[[ArcWords Time can be rewritten]] -- remember [[UsefulNotes/JohnFKennedy Kennedy]]?"
* "[[Recap/DoctorWhoS32E10TheGirlWhoWaited The Girl Who Waited]]": The numerous unseen adventures of Older Amy, including building a sonic ''[[InsistentTerminology probe]]'', acquiring a katana, disarming the Rory-bot and reprogramming Interface.
* "[[Recap/DoctorWhoS32E11TheGodComplex The God Complex]]": This episode isn't the first time the Doctor's been [[MakesJustAsMuchSenseInContext threatened with a chair leg]].
* "[[Recap/DoctorWhoS32E13TheWeddingOfRiverSong The Wedding of River Song]]":
** The Doctor, to Dorium: [[Recap/DoctorWho50thASTheDayOfTheDoctor "Liz I is still waiting in a glade to elope with me!"]]
** Just ''how many'' stag parties did Jack Harkness have?
** Just what did River do to Kennedy?
** Cleopatra's met River, mentioned the Doctor, and told her to "put down that gun". River ''did''... "eventually".
* "[[Recap/DoctorWhoS32HVBSNightAndTheDoctor Night and the Doctor]]":
** "Bad Night": Something happened involving the Doctor and River at a party, a cricket bat, [[UsefulNotes/HMTheQueen the Queen of England]] being turned into a goldfish, a pet shop, a rioting commonwealth and an alien warlord being turned into a fly as a hostage.
** "Good Night": The Doctor rescued a possessed orchestra on the moon with River's help, which apparently involved Creator/MarilynMonroe and a biplane.

!!Series 7
* "[[Recap/DoctorWhoS33PrequelPondLife Pond Life]]":
** "April": The Doctor leaves a message on Amy and Rory's answering machine about escaping from Sontarans by surfing on lava, meeting Mata Hari and recording a rap album.
** "May": The Doctor bursts in on Amy and Rory in the middle of the night, and tells them that the planet's in danger, but he apparently got them at the wrong time. [[BlatantLies He then claims that the planet is perfectly safe.]]
** "June": The Doctor somehow accidentally left an Ood at Amy and Rory's house.
* "[[Recap/DoctorWhoS33E2DinosaursOnASpaceship Dinosaurs on a Spaceship]]":
** The episode begins just after the Doctor saved Queen Nefertiti's people from an invasion of giant alien locusts.
** The last time the Doctor saw [[GreatWhiteHunter John Riddell]], he left him with two very disappointed dancers after saying he was popping out for liquorice. Riddell also says that the Doctor isn't talking him into something "again".
** On a more mundane note, the "Loft Incident" that left Brian wary of letting Rory hold a ladder on his own.
* "[[Recap/DoctorWhoS33E3ATownCalledMercy A Town Called Mercy]]":
** Rory apparently left his phone charger in Henry VIII's ensuite.
** At the end:
--->'''The Doctor:''' Ooh! You know all the monkeys and dogs they sent into space in the '50s and '60s? You will never guess what happened to them.
* "[[Recap/DoctorWhoS33E4ThePowerOfThree The Power of Three]]":
** The Doctor at one point takes Amy and Rory on a seven-week trip as an anniversary present. Some highlights:
*** The trip kicked off with a night at the Savoy Hotel in 1890 -- except that there was a Zygon ship buried under the hotel, and half the staff were impostors.
*** The visit to Henry VIII mentioned in the previous episode is elaborated upon -- apparently Amy accidentally married him.
** The Doctor once ran a restaurant, and claims to have invented the Yorkshire pudding.
** One of Rory's patients at the hospital is a man with his foot stuck in a toilet. [[OhNoNotAgain It's not the first time.]]
** The Doctor, while playing Wii Tennis (Fred Perry was a famous tennis player from the 1930s):
--->"If only Fred Perry could see me now!... He'd probably ask for his shorts back."
* "[[Recap/DoctorWhoS33E6TheBellsOfSaintJohn The Bells of Saint John]]":
** The people at the Shard, while looking for the TARDIS, had an "embarrassment" involving the police box outside the Earl's Court Tube station.
** The bad guys had to stage the London riots, for an unknown reason.
* "[[Recap/DoctorWhoS33E7TheRingsOfAkhaten The Rings of Akhaten]]": Apparently the Doctor previously visited Akhaten with his granddaughter.
* "[[Recap/DoctorWhoS33E9Hide Hide]]": Professor Palmer's World War II exploits include something involving carrier pigeons.
* "[[Recap/DoctorWhoS33E12NightmareInSilver Nightmare in Silver]]": How Clara convinced the Doctor to take Angie and Artie on a trip in the TARDIS.
* "[[Recap/DoctorWhoS33E13TheNameOfTheDoctor The Name of the Doctor]]":
** Apparently the Doctor saved Jenny's life when he and Vastra first met her.
** When Clara is [[spoiler:splintered throughout the Doctor's timeline]] we see several:
*** An unseen adventure the Sixth Doctor had aboard a spaceship.
*** The Eighth and Second Doctors appear to have been in the same place at the same time once (a beach on Earth), although it's unknown whether it was the same adventure or not.
*** The Tenth Doctor appears to have first visited the Library ''before'' it was sealed due to the [[Recap/DoctorWhoS30E8SilenceInTheLibrary Vashta]] [[Recap/DoctorWhoS30E9ForestOfTheDead Nerada]].

!!50[[superscript:th]] Anniversary Specials
* "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]"
** The Black Archive has boards covered in pictures depicting unseen adventures involving the Doctor's companions, including ones who never met onscreen.
** Clara's apparently been to the Black Archive before, but had her memory wiped.
* "[[Recap/DoctorWho2013CSTheTimeOfTheDoctor The Time of the Doctor]]":
** We don't know when, exactly, the Doctor acquired Handles.
** The Doctor's past with Tasha Lem is a complete mystery. The only thing we know is that the last time he saw her was sometime before "[[Recap/DoctorWhoS30E17E18TheEndOfTime The End of Time]]", because she makes it clear she's never met Eleven before.
** Most of the Siege of Trenzalore is mysterious, including why the Doctor started using a cane. And yes, there's an Expanded Universe short story collection, ''Tales of Trenzalore'', to help with that.

!!Series 8
* "[[Recap/DoctorWhoS34E1DeepBreath Deep Breath]]"
** Vastra's reaction upon seeing the Twelfth Doctor for the first time implies that Eleven wasn't the first incarnation of the Doctor she's met.
** Vastra tells Clara that the Doctor "really knows how to put a band together." Said band apparently included Roman emperor Marcus Aurelius on the bass guitar.
* "[[Recap/DoctorWhoS34E6TheCaretaker The Caretaker]]":
** The audience sees snippets of three adventures: the Doctor and Clara chained to stakes on a desert planet, something about "fish people" and then running away from people with lasers.
** The Doctor said that he once spent a month living/sulking with otters because of a fight with River. The nature of the fight and where it takes place during the Doctor's timeline is a mystery, other than the fact that it was when he was Eleven.
** According to Danny, Clara once turned up on a date wearing a space helmet.
* "[[Recap/DoctorWhoS34E7KillTheMoon Kill the Moon]]": The Doctor mentions he once took Clara out for dinner in [[UsefulNotes/NaziGermany 1938 Berlin]].
* "[[Recap/DoctorWhoS34E12DeathInHeaven Death in Heaven]]": We don't know how the Master regenerated from Saxon into Missy.
* "[[Recap/DoctorWho2014CSLastChristmas Last Christmas]]": The Doctor wakes up by a volcano. We don't know what he was doing there, or why it looks like the dream volcano from "[[Recap/DoctorWhoS34E11DarkWater Dark Water]]".

!!Series 9
* "[[Recap/DoctorWhoS35E1TheMagiciansApprentice The Magician's Apprentice]]":
** We don't know how the Doctor managed to wind up on [[spoiler:Skaro, when Davros was young]]. Or why he was looking for a bookshop.
** Clara's met Creator/JaneAusten, and apparently she's a "phenomenal kisser".
** Clara has now worked with UNIT enough that they not only accept her as a surrogate for the Doctor but will give her the authority to command their personnel.
** The Doctor, on his previous "duel" with Bors: "And a daffodil is not a broadsword, but I still won the last round!"
** Missy mentions two noodle incidents: the Cloister Wars, and the time the Doctor stole the moon and the President's wife.
* "[[Recap/DoctorWhoS35E2TheWitchsFamiliar The Witch's Familiar]]":
** Missy's escape method is based on one of the Doctor's.
--->"He's travelling by teleporter. Unfortunately the teleporter's out of power. Also unfortunate, he's being stalked by, oh, say about 50 android assassins? I may be rounding up!"
** And then, at the end of her story, there's ''another'' one:
--->'''Clara:''' So the androids think he's dead, and the Doctor escapes?\\
'''Missy:''' No, he's the Doctor. [[DiabolusExMachina He fell into a nest of vampire monkeys.]] But that's another story!
** Missy gives a BadassBoast to the Supreme Dalek implying they've met before.
** Missy gets another one at the end of the episode. She's surrounded by Daleks, no Vortex Manipulator and the entire city is collapsing around her. And then, she says "I've just had a very clever idea..." with a fiendish smile... And throughout her appearances in Series 10, we ''never'' find out what that idea was! ''Nor'' how she escaped the Daleks and ended up on the executioner's planet in [[Recap/DoctorWhoS36E6Extremis Extremis]]!
* "[[Recap/DoctorWhoS35E3UnderTheLake Under the Lake]]":
** Clara lost her sunglasses and most of her dignity on a planet where it's perpetually New Year's Eve.
** Clara once got into an argument with Gandhi.
** The Doctor once met Creator/ShirleyBassey, which got him overexcited.
** The Doctor once stayed in one place long enough to be driven nuts by Peter Andre's "Mysterious Girl" playing on the TARDIS radio for two weeks, driving him to dismantle the radio and build a clockwork squirrel out of it.
* "[[Recap/DoctorWhoS35E4BeforeTheFlood Before the Flood]]": InUniverse Doctor fangirl O'Donnell mentions, between [[Recap/DoctorWhoS29E12TheSoundOfDrums Mr. Saxon]] and [[Recap/DoctorWhoS34E7KillTheMoon the Moon exploding and a big bat thing flying out]], "the Minister of War". The Doctor nearly asks her about it, but decides not to on the grounds he'll eventually find out anyway (one of the only recorded instances of the ''Doctor'' learning about a future event in such a fashion).
* "[[Recap/DoctorWhoS35E5TheGirlWhoDied The Girl Who Died]]":
** The episode kicks off with Clara stuck in deep space with a love sprite in her spacesuit, while the Doctor lures an enemy fleet of some kind halfway across the universe. This stems from an incident in a place called the "spider mines".
** Apparently Clara once wielded a sword in battle. Even ''the Doctor'' was surprised to learn this.
* "[[Recap/DoctorWhoS35E6TheWomanWhoLived The Woman Who Lived]]":
** Ashildr's been up to a lot over the past 800 years, including being a medieval queen and saving a village from scarlet fever. She was also apparently at a leper colony.
*** There's an ExpandedUniverse short story collection, ''The Legends of Ashildr'', that fills in some of the gaps.
** The Doctor helped one of Clara's students with a history assignment by taking her to meet Winston Churchill. (The assignment: the students had to write an ''imaginary'' interview with Churchill. You can guess the rest.)
* "[[Recap/DoctorWhoS35E8TheZygonInversion The Zygon Inversion]]":
** It is [[AmbiguousSituation entirely possible]] that Kate Lethbridge-Stewart has learned, and subsequently been [[LaserGuidedAmnesia memory-wiped of]], the secret of the Osgood Boxes on 15 previous occasions.
** In addition to what is indicated above, Clara has become so important that she is one of only a few people on the planet who can access the Black Archive.
* "[[Recap/DoctorWhoS35E10FaceTheRaven Face the Raven]]":
** The episode begins with the Doctor and Clara entering the TARDIS, after she did something that resulted in the pair of them being banished from the second-most-beautiful garden planet in the universe. It also involved the Doctor nearly marrying a sentient plant, and Clara doing something physical that ''really'' impressed the Doctor.
** More Jane Austen -- apparently she and Clara have been playing pranks on each other. Clara later says she ''loves'' Austen -- "Take that how you like".
** The Doctor's been keeping tabs on Ashildr, although he lost track of her in the 1800s.
** In a deleted scene, the Doctor and Clara had a run-in with Creator/DerrenBrown -- who may or may not be an alien -- that led to him being declared PersonaNonGrata with the Doctor.
* "[[Recap/DoctorWhoS35E12HellBent Hell Bent]]": It's revealed that the Doctor didn't steal the moon and the President's wife. He ''lost'' the moon and stole the President's ''daughter''. Apparently the former version was a lie put out by the Shobogans.
* "[[Recap/DoctorWho2015CSTheHusbandsOfRiverSong The Husbands of River Song]]":
** River married Ramone and then wiped his memory of it because he was being "annoying".
** River has apparently borrowed the TARDIS without the Doctor's knowledge on many previous occasions.
** River, on why she wants Flemming to deadlock the door to the baggage hold: "Remember that time I was transporting dragon eggs?"
** [[Recap/DoctorWhoS32E1TheImpossibleAstronaut Jim the Fish]] gets another mention.
** Among the people who have previously been married to either the Doctor or River include Cleopatra and Creator/StephenFry.

!!Series 10
* "[[Recap/DoctorWho2016CSTheReturnOfDoctorMysterio The Return of Doctor Mysterio]]":
** We don't know what happened during the Doctor and River's 24 years on Darillium, in particular why and how the Doctor put Nardole back together. All we get is Nardole needling the Doctor for needing ''someone'''s company.
** At one point, Nardole materializes the TARDIS around the Doctor. Thing is, it took him a few tries, and on one of those tries he wound up emperor of Constantinople in the twelfth century, where he "ruled firmly, but wisely".
* "[[Recap/DoctorWhoS36E1ThePilot The Pilot]]": Why the Doctor made a promise to guard a vault hidden underneath the University of Bristol.
* "[[Recap/DoctorWhoS36E2Smile Smile]]": The Doctor once met an emperor made of algae, who fancied him.
* "[[Recap/DoctorWhoS36E3ThinIce Thin Ice]]": This episode is the third time the Doctor's taken a companion to the last of the great frost fairs, one of the previous occasions being the time he brought River Song and Stevie Wonder mentioned in "[[Recap/DoctorWhoS32E7AGoodManGoesToWar A Good Man Goes to War]]". [[note]]The other is possibly either the First Doctor audio drama ''Frostfire'' or the Tenth Doctor online story ''The Frozen'', depending on what you consider canon. The Twelfth Doctor novel ''Silhouette'', however, is set at a much later and presumably less great frost fair.[[/note]]
* "[[Recap/DoctorWhoS36E5Oxygen Oxygen]]": Nardole apparently once had to go on the run and get a new face, the new face being the one he now has.
* "[[Recap/DoctorWhoS36E6Extremis Extremis]]": The Doctor spent a night with Pope Benedict IX (who was apparently female and could do naughty things with castanets) in 1045.
* "[[Recap/DoctorWhoS36E8TheLieOfTheLand The Lie of the Land]]": Several.
** What Bill did for the past six months.
** Missy's past encounters with the Monks, which included pushing a little girl into a volcano.
** Missy once made a gun out of leaves.
** When Nardole learned Tarovian martial arts.
* "[[Recap/DoctorWhoS36E10TheEatersOfLight The Eaters of Light]]": The Doctor has previously spent time in Roman Britain as a governor, farmer, juggler and vestal virgin (second class). For some reason it's the "second class" bit that Nardole has a problem with, but all the Doctor says is "It's a long story."