History Franchise / BackToTheFuture

** The 2010 DVD rerelease and Blu-ray debut (and 2015 reprints) had bad end credits on the original ''Film/BackToTheFuture'', with the text tilted, off-center, and squished by 25%. This was never fixed in that release cycle, but 2020 Blu-ray and 4K discs have the correct credits (standalone DVD rereleases may use the 2010 master).

** In the first movie ''Film/BackToTheFuture'', Marty cause Biff and his gang to crash into a manure truck and dump the contents on Biff's convertible.

** The first film ends with Doc Brown arriving from the year 2015 to bring Marty and his girlfriend, Jennifer, to the future to aid his children, and the sequel continues where this ending left off.
** The second film Doc Brown gets struck by lighting while in the Delorean in 1955, making Marty fear he's dead. A letter reveals that Doc was actually taken back to 1885 due to a fluke with the Delorean, leaving Marty to contact 1955 Doc and the sequel continues where this ending left off.

* ''Theatre/BackToTheFuture'' (2020) - [[/index]]the ScreenToStageAdaptation of the first film.[[index]]

** "[[AC:[[ComputerVoice Thank you for using AT&T]]]]."

-->-- '''Dr. Emmett L. "Doc" Brown'''

-->'''Marty:''' Yeah; [[CharacterDevelopment you think I was stupid enough to race that asshole?]]

-->'''Doc''': I had to do something, she saw the time machine, I couldn't leave her with that information! Don't worry, she's not essential to my plan.

--> '''Marty:''' Better get used to these bars, kid.

--> '''Marty''': I dreamed that I went back in time.

* StableTimeLoop: Interestingly, according to WordOfGod[[invoked]], as a general rule of thumb, the past is never "already altered" (hence the inclusion of YouAlreadyChangedThePast below). So officially, [[http://www.cracked.com/video_18203_why-back-to-future-secretly-horrifying.html if it seems like a time traveler has become the cause of something that already existed, he has merely replaced that cause]], [[RippleEffectProofMemory possibly using information gained from the result of a cause that now never happened]]. So originally, Clint Eastwood and Chuck Berry were truly original, Goldie Wilson came up with the idea to run for mayor himself, there wasn't a strange sequence of events at the 1955 school dance (let alone two), and Doc Brown was killed by Libyans. Then Marty happened.\\\
It's best explained, as the filmmakers do, by paying careful attention to the Clocktower. In the original timeline the stone ledge under the clock is perfectly intact only for it to be broken when Doc climbs up there during the climax. The ledge is broken in all subsequent appearances. So yes, there ''was'' an original timeline that Marty erased through his actions in the past.

--> '''Doc''': "What on Earth is that thing I'm wearing?" (referring to the radiation suit he was wearing in the 1980s film to protect him from the Flux Capacitor.)\\
--> '''Marty''': "A radiation suit"\\
--> '''Doc''': "Of course! Because of all the fallout from the atomic wars!"\\
--> '''Doc''': "I'm sure that in 1985, plutonium is available in every corner drugstore, but in 1955, it's a little hard to come by."

--->'''Jennifer:''' ''(As they both watch Needles race off)'' Did you do that on purpose?!
--->'''Marty:''' Yeah; [[CharacterDevelopment you think I was stupid enough to race that asshole?]]

-->'''Marty''': What did you bring her for?!

* VagueAge:
** Doc's age in 1955 and 1985 is never mentioned in the films. The fact that Christopher Lloyd looks exactly the same in both time frames doesn't help. He must be in his 80s in 1985. Fairly hilarious in that his age is referenced in Part II (with his "old" mask removal and his comments about having work done), so he didn't have to wear makeup. Yes, he really was given an age-up for the original 1985. Lloyd just has that old puppy dog face no matter what his age, apparently.

---> '''Doc''': "What on Earth is that thing I'm wearing?" (referring to the radiation suit he was wearing in the 1980s film to protect him from the Flux Capacitor)
---> '''Marty''': "A radiation suit"
---> '''Doc''': "Of course! Because of all the fallout from the atomic wars!"
--->'''Doc''': "I'm sure that in 1985, plutonium is available in every corner drugstore, but in 1955, it's a little hard to come by."

* TheProfessor: Doc Brown

** "''Nobody''... calls me chicken." (With a variation in ''Part III'', where the equivalent word is "yellow") This particular berserk button appears to be subject to sequel retconning, as it is nowhere in evidence in ''Part I''. He did seem more willing to get into a fight than was sensible, but not directly from being called names.

** In 2015, we find that Marty's future life is not going too well, the result of his life going down the toilet after a car accident when he got challenged by Needles, who called him "chicken" to a street race, in which Marty collided with a Rolls Royce and broke his hand, and the driver of that car pressed charges. Marty gave up on his music career and has been resorting to rather desperate means to stay afloat, to such that he agrees to participate in an illegal business deal with Needles after Needles calls him "chicken", and gets a bunch of YOU'RE FIRED!!! faxes from Fujitsu as a consequence. Then the main plot kicks in, which sends Marty and Doc back to Alternate 1985, then to 1955, and then to 1885 for the remainder of Parts II and III. When Marty returns to the present and picks up Jennifer, they are driving in Marty's new 4x4 pickup past the entrance to Hilldale, the neighborhood where the future Marty will live, and our Marty recognizes the place. Just then, Needles and some of his pals pull up alongside Marty and the "chicken" thing comes up. Marty looks like he's going to give in and race Needles, Jennifer desperately telling him not to... but when the light turns green, Marty floors his vehicle in reverse while Needles speeds forward. As Needles barrels down the street, he and his pals narrowly swerve to avoid an oncoming Rolls Royce making a left turn off a side street, and Jennifer realizes it's the car Marty would have hit.

** Also hilariously lampshaded in the first film: "Weight has nothing to do with this!", "There's that word again, 'heavy'. [...] Is there a problem with the Earth's gravitational pull?"

** Mr. Fusion is a riff on Mr. Coffee, one of those ubiquitous Eighties/Nineties appliances that nobody owns anymore. Alternatively, it could reference Mr. Transmission, an auto repair chain primarily in the South, but with franchises in California.

** An aversion whereas Mustang tried to get in on it only for the producers to fight for keeping the [=DeLorean=].

* ''Film/BackToTheFuture'' (1985) - The first film.

* LateArrivalSpoiler: In the first film, Doc is shot by terrorists early on. There are two sequels, and Creator/ChristopherLloyd is on the cover of both of them, so it should be obvious to new viewers that he won’t stay dead.

* TheLawOfConservationOfDetail: The first twenty minutes or so of ''Part I'', as well as 2015 [=McFly=] house portion of ''Part II''.

* TheAllegedCar: While these films made the DMC [=DeLorean=] ''the'' coolest of the {{Cool Car}}s, they also showed that it was delicate and prone to a number of problems (e.g. stalling on a hot start, sticky doors).[[note]]Albeit this detail is lost for foreign audiences because [[NoExportForYou DMC didn't sell outside the U.S.]][[/note]] The [=DeLorean=] misbehaves particularly badly in the first movie, so maybe Doc worked some of the kinks out with the hover conversion?

* NoPronunciationGuide: For "gigawatts". Not so noticeable to the general public at the time, but over 20 years on, the prefix "giga-" (beginning with a hard "g") [[TechMarchesOn has become commonplace]] for computer-related terms[[note]](Gigabyte and gigahertz likely being the most commonly known among the average computer user)[[/note]], so nowadays it's bound to give even non-engineers pause. (Or, make people think you're referencing ''Back to the Future''...)

[[caption-width-right:350: ''Your future is whatever you make it, so make it a good one.'']]

* AluminumChristmasTrees: The [=DeLorean=]. The [=DeLorean=] Motor Company went bankrupt in 1982, well before the film was made, and Robert Zemeckis had to argue with Universal to use the car since DMC wouldn't be able to give them any commercial endorsements. At the time the car was considered a failure--underpowered, unreliable, generally just a crappy car, which is why DMC went out of business. Indeed this joke is played on in the film as the [=DeLorean=] has a habit of [[MyCarHatesMe stalling on Marty at the worst possible time]]. It's now entirely thanks to this series that anyone remembers it.
** The use of the word "Dude" as an insult in the 1885 segments. Back then it was pretty much equivalent to "City slicker" or "Dandy", and meant someone with no experience of horses or cattle trying to play cowboy. (It is still used this way when referring to a "dude ranch.") Its use as a term of affection only goes back as far as TheSixties.
** An unintentional one occurs with the pronunciation of the word "gigawatt". The director's commentary notes that they were unaware that the word is pronounced with a hard "g" sound, hence the use of the pronunciation "jiggawatt" in the film. They only used that pronunciation because that's the pronunciation a real guy used in a lecture they attended in preparation for the film. As it turns out, however, "jiggawatt" is the actual original pronunciation of the word (derived from the Ancient Greek word "gigas", meaning "giant", and was pronounced with a soft "g") and its use by the older and eccentric Doc Brown is rather believable.

->''"{{If my calculations are correct}}, when this baby hits 88 miles per hour, you're gonna see some serious shit."''

* PlayingGertrude: Intentional example. Creator/LeaThompson is just nine ''days'' older than her onscreen son Creator/MichaelJFox. Creator/CrispinGlover is actually three years ''younger'' than Fox, and Creator/ThomasFWilson is just two years older than Fox. This trope is played straight when it comes to scenes in 1985. But it becomes averted once we go back in time to 1955, where Thompson, Glover, and Wilson are playing their characters at or around Marty's age.

* ''Super Back to the Future Part II'' (1993) - [[/index]]a side-scroller for UsefulNotes/SuperFamicom only released in Japan.[[index]]

* SurprisinglyRealisticOutcome:
** One segment in ''Part II'':
--->'''Marty [=McFly=]:''' "There he is, Doc! Let's land on him, we'll cripple his car."
--->'''Doc:''' "Marty, he's in a '46 Ford, we're in a [=DeLorean=]. He'd rip through us like we were tin foil."
** As noted above, in ''Part III'', Marty being a crack shot in a lightgun game and even in a carnival game with a real gun would ''not'' have been enough to save him in a real and lethal shooting duel.

* IdenticalGrandson: Michael J. Fox, Creator/ThomasFWilson, and some of the minor characters all wind up portraying their own ancestors/descendants (including [[UpToEleven Including Michael J. Fox in drag playing an Identical Daughter]]). Lampshaded in Part III, after Buford mistakes Marty for Seamus [=McFly=], says "You ain't Seamus [=McFly=]... you look like him, though." Creator/LeaThompson plays different ages of the same character, Lorraine Baines-[=McFly=], but also Maggie [=McFly=], Marty's ''paternal'' great-great-grandmother and thus [[IdenticalStranger not (apparently) related to Lorraine]] at all.

->''"[[IfMyCalculationsAreCorrect If my calculations are correct]], when this baby hits 88 miles per hour, you're gonna see some serious shit."''

* ArtisticLicenseCars: The [=DeLorean=]'s VanityPlate is a California plate that reads "OUTATIME", which is 8 characters. At the time, California plates could only be 7 charcters long; it wasn't until 2014 that eight-character plates could be used.