In the classic 1951 sci-fi film ''[[Film/TheDayTheEarthStoodStill1951 The Day the Earth Stood Still]]'' the alien Klaatu arrives on Earth with a message for the world's leaders. His welcome on arrival was less than warm.

Anticipating that things could go very wrong, Klaatu teaches a human woman this phrase should anything happen to him. ''Klaatu Barada Nikto'' is a now common catchphrase in sci-fi. It was a message to shut down [[CrushKillDestroy the rampage of the robot]], Gort, that accompanied Klaatu on his mission to Earth. Oddly enough, no known translation has ever been given for the phrase though "Klaatu" can be presumed to refer to the film's protagonist.

The classic status of the film has led to ''Klaatu Barada Nikto'' being [[StockShoutOuts hidden in all manner of media]] from sci-fi to fantasy to comic books to music.

Despite its appearance in the original and even though KeanuReeves insisted on its presence, [[ExecutiveMeddling the phrase was deliberately rendered almost unintelligible in]] TheRemake.

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!!Examples:

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[[folder: Anime & Manga ]]

* Whether a coincidence or not, the phrase shows up in the second episode of the Anime/ReadOrDie OVA when Genjo begins to chant while preparing to chant. It's rendered more like klatu barata niktu and only in the dub, but it can still be heard fairly clearly.

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[[folder: Comics ]]

* Creator/BettiePage Comics #1, [[http://comicartfans.com/GalleryPiece.asp?Piece=165255&GSub=26260 Bettie greets visiting aliens with this famed phrase]]... but gets it wrong. "Klaatu Barrada [[SteveDitko Ditko]]" indeed.
* MyCage : [[http://www.chron.com/apps/comics/showComick.mpl?date=20100520&name=My_Cage The first thoughts of baby Sunny]], likely trying to shut down her psychotic mother.
* [[ComicBook/IncredibleHulk Hulk]] character [[http://www.marvunapp.com/Appendix/klaatuhu.htm Klaatu]] was named [[CaptainObvious after Klaatu]].
* In a ComicBook/FantasticFour comic by Creator/JohnByrne, the FF run into aliens in the Arctic. A rather frustrated Ben Grimm says that if he hears any "Klaatu Barada Nikto!", he's out of there (paraphrased).
* In one DonRosa comic DonaldDuck greets an alien with this phrase, accompanied by the [[Franchise/StarTrek Vulcan salute]] (or as close to it as he can get with only four fingers).

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[[folder: Film ]]

* In ''[[Franchise/EvilDead Army of Darkness]]'', Ash needed to say these three words to shut down a rampage too. And of course when it came time to say them, he forgot what the third word was. Twice.
--> ''Ash'': Klaatu...barada...ni'''COUGH'''t'''COUGH'''!
** Some of the subsequent allusions to this phrase (including some listed on this page) refer to ''[[Franchise/EvilDead Army of Darkness]]'', which has [[WeirdAlEffect overshadowed]] ''Film/TheDayTheEarthStoodStill1951'' to some extent.
** Extremely obvious in Germany. In Army of Darkness's German dub version, the line was "Klaatu ''Verata'' Nikto", so every German dub afterwards that considered AoD to be the origin of the reference will have the "Verata" line.
* In ''Film/GalaxyQuest'', the Thermians come from the Klaatu nebula.
* In ''StarWars'', Klaatu (of the species Nikto) and Barada (of the species Klatoonian) were two of Jabba's guards.
* In the RobinWilliams movie ''Film/{{Toys}}''. [[spoiler: The BigBad tries to deactivate his experimental killing machine with this in the climax.]]
* In ''{{Tron}}'', a plaque that reads "Gort, Klaatu Barada Nikto" can be seen on the wall of Alan Bradley's cubicle. [[AIIsACrapshoot Oddly appropriate for a programmer on a system like]] [[MasterComputer ENCOM's grid]].

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[[folder: Literature ]]

* In the short story "A Sound of Blunder", Klaatu Barada Nicto was the phrase spoken to the CaptainErsatz of the {{Necronomicon}} in order to travel through time. Saying it backwards brings one back to our time.
* In one of the volumes of ''Literature/{{Animorphs}}'' [[AlienAmongUs Ax]] is forced to demorph in front of a human (to his andalite form) when his morph is poisoned. Marco, disguised in morph and speaking for Ax using thought-speak, attempts to convince the human that Ax is friendly using this phrase.
* In the ''Franchise/StarWarsExpandedUniverse'', the Nikto are a species of reptilian slaves, while Barada and Klaatu are two of Jabba the Hutt's lackeys.
* In the Creator/StephenKing novel, ''TheTommyknockers'', a young reporter, John Leandro, is convinced that [[TownWithADarkSecret something is wrong in a small town called Haven]]. His colleague, David Bright mocks him from it, saying that it's must be "green men from space" and quotes the phrase. (The town is actually controlled by aliens).
* ''Literature/ThePoisonwoodBible'' gives a brief mention of this phrase when Rachel wants to yell some foreign language at the Congolese villagers, among other options "Bukabuka" or "[[DwightDEisenhower We like Ike]]".
* A series called 'The Klaatu Diskos' has the Klaatu, ghostlike beings made from a transplanted human consciousness. By book two, there have been no signs of either 'nikto' or 'barada', but a horse called Gort has showed up.

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[[folder: Live Action TV ]]

* ''Series/{{Farscape}}''
* ''HerculesTheLegendaryJourneys''
* ''Series/HoneyIShrunkTheKids''
* The phrase appeared in an episode of ''TheMonkees'', when Mickey Dolenz is replaced by an alien-controlled robot.
* One of the three passwords in the Room of the Secret Password in ''LegendsOfTheHiddenTemple.''
* In ''TheRockfordFiles'', Rockford said it to a rather large chunk of muscle.
* ''Series/{{Wings}}'' "Black Eye Affair"
* In ''TwoAndAHalfMen'', when Alan starts sleepwalking, he says it to Charlie as he's put to bed.
* In a third-season episode of ''Series/TheXFiles'', a man pretending to suffer from stigmata begins faking glossolalia (speaking in tongues); one of the phrases he says is this.

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[[folder: Music ]]

* The band Klaatu is named after the same character. When Klaatu first became known, they were rumored to be the Beatles reunited under a pseudonym.
* [[Music/TheBeatles Ringo Starr's]] solo album ''[[http://en.wikipedia.org/wiki/File:Goodnightvienna.jpg Goodnight Vienna]]'' uses a still from ''The Day The Earth Stood Still'' as its cover art, with Ringo's head replacing Klaatu's.

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[[folder: Real Life ]]

* Mozilla Firefox used to have a page at "about:robots" with the title "Gort! Klaatu barada nikto!"
** No "used to" about it. It actually is the title of the page up on the frame, not in the text of the page.

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[[folder: Theatre ]]

* The play TheForeigner references this. The main character, a science-fiction magazine editor, ends up [[ItMakesSenseInContext scaring off the local KKK]] with a string of frightening-sounding nonsense, including this line.

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[[folder: Video Games ]]

* ''{{Reunion}}'' has a scientist named Klaat'''oo''' and a planet named after him with moons called Barada and Nikto.
* ''TheLostVikings 2''; in the medieval levels, the teleportation spell is always "Klaatu, barada, something". Needless to say they don't work as desired.
* ''Myth II: Soulblighter''
* ''robotfindskitten''
* In ''RuneScape'', the magic words "Klaatu Barada Nikto" spoken by a certain character trigger a spell that teleports you a place where you can mine rune essence.
* In ''VideoGame/{{Sacrifice}}'', "klaatu", "barada", and "nikto" are three of the magic words that are combined to form various magical incantations; though not necessarily all three together or in order.
* Mysterio's first appearance in ''SpiderMan 2'', TheGameOfTheMovie, has him posing as an alien invader, and says this, as well as "AllYourBaseAreBelongToUs."
* In ''VideoGame/WorldOfWarcraft'', there are three {{NPC}}s named Klaatu, Barada and Nikto.
* ''[[SpyroTheDragon Spyro 2 (Ripto's Rage/Gateway to Glimmer)]]'' references this, as a sage in one of the later levels claims that saying those words would bring Spyro to where he wanted to go at the start of the game. However, he couldn't quite remember the third word, so he dropped the matter.
* There's a series of helms in ''VideoGame/{{Dragonfable}}'' named after this.
* Spike the Clown from ''ToonStruck'' says this in response to being told "I believe the spatula is mine!". Did we mention he's an ''insane'' clown?
* In one mission in the RTS ''Myth: The Fallen Lords'', a barbarian is sent to say the magic phrase that will awaken Myrdred the Deceiver. Subverted when, even though the barbarian says something like "Clambake Baraka Nictuu", it works anyway... Myrdred wakes up from his thousand-year-sleep, says "close enough", and teleports himself and your troops out of the area.
* When Globox is trying to open the doors in ''VideoGame/Rayman3HoodlumHavoc'', he can be heard calling out this phrase, among others.
* In ''VideoGame/RobotOdyssey'', it pops up after solving the final puzzle on the city level.
* In the "Ebil Dread" adventure from the ''VideoGame/AdventureQuestWorlds'' 2nd Birthday Event, the horde of pink undead summoned up by Beleen can only be destroyed by assembling the George Lowe-onomicon and speaking the magic words. As the adventure in question is a ShoutOut to the ''Franchise/EvilDead'' series and ''[[Franchise/EvilDead Army of Darkness]]'' in particular (including Artix replacing his possessed pink hand with a [[ChainsawGood chainsaw]]), one can pretty much guess what those magic words are. And much like Ash, Artix...doesn't quite get that last word right. Poor guy.
* The Peacekeeper in ''SwordOfTheStars'', in PigLatin. It's been nicknamed "Ortgay" as a result.
* ''RagnarokOnline'' the quest in the underworld Nifflheim (part of the very long "Sign" quest) where you speak the magic words "Klaatu Barada Nikto" to a ghost named "Ash", this is another ''[[Franchise/EvilDead Army of Darkness]]'' reference as the title character of that movie is Ash.
* Uttered by the Advanced Magic Towers in VideoGame/KingdomRush.
* In ''VideoGame/PokerNight2'' when in the Evil Dead inventory skin, Max will try to say this from the Necronomicon to the first player eliminated, but messes it up (the player is still sucked into the book). Ash even tries to correct Max, but he still messes it up. He later claims he needs his ears checked.

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[[folder: Webcomics ]]

* [[http://www.bobandgeorge.com/archives/index.php?date=000506 This]] ''BobAndGeorge''. The commentary by the author states that it was in reference to ''[[Franchise/EvilDead Army of Darkness]]'', and he had [[OlderThanTheyThink never seen The Day the Earth Stood Still]].
* ''[[http://www.vanvonhunter.com/vvh56.html Van Von Hunter]]''
* In ''{{Sinfest}}'', this is [[http://www.sinfest.net/archive_page.php?comicID=2904 the incantation]] to summon a [[strike:{{hellhound}}]] heckhound.
* ''Webcomic/PvP'': The Dork Ages. "Klaatu Barada Nikto" was the secret password to obtain an XBox
* Webcomic/LegostarGalactica features three dark jedi named Chris Klaatu, Barada and Ambar Nikto.
* ''{{Nodwick}}''. [[http://nodwick.humor.gamespy.com/gamespyarchive/index.php?date=2007-05-16 It's a password]].
* ''Webcomic/{{Freefall}}'': Klaatu! Barada! [[RunningGag Doggy!]] (http://freefall.purrsia.com/ff1400/fc01372.htm here).
* In ''TwoLumps'', near the end of its YetAnotherChristmasCarol, Eben tries various escape chants: "[[TheWizardOfOz There's no place like home!]] Klaatu Barada Nikto! Film/{{Beetlejuice}}, WesternAnimation/{{Beetlejuice}}, B--"
* A RunningGag in ''JoeLovesCrappyMovies'' is imagining [[McDonalds The Grimace]] in various movie roles to make crappy movies better. When he's pictured in Keanu Reeves's place in ''Film/TheDayTheEarthStoodStill2008'', he says "Klaatu Barada Milkshake".

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[[folder: Web Original ]]

* Its use in ''The Franchise/EvilDead'' (probably) is referenced in ''WebVideo/SuburbanKnights''. However, WebVideo/TheNostalgiaCritic pronounces it "Klaatu... Barada... Necktie..."
* ''WebVideo/ToBoldlyFlee'', the sequel to the above, has the Critic get saved in the middle of a battle by [[spoiler: WebVideo/TheAngryVideoGameNerd]] dressed as Gort. He mumbles "Klaatu, Barada, whatever" and goes on with his mission.

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[[folder: Western Animation ]]

* JimmyNeutron used these as magic words in a Franchise/HarryPotter parody. The phrase was also used by Carl in the episode "Time Is Money", when Jimmy met his own parents in the past.
* One episode of the [[WesternAnimation/TeenageMutantNinjaTurtles2003 2003 version]] of ''Franchise/TeenageMutantNinjaTurtles'' had Michelangelo trying to stop an alien HumongousMecha this way. It didn't work.
* An episode of the [[WesternAnimation/TeenageMutantNinjaTurtles1987 1980s Turtles series]] revealed that members of the alien Polarisoid's family had these names.
* An episode of ''WesternAnimation/DarkwingDuck'' has aliens from a ''literal'' PlanetOfHats invade Earth; their names are ''Flarg,'' Barada, and Nikto, but the benevolent alien ruler who comes to apprehend them is named Klaatu II.
* In an episode of ''RockosModernLife'', Heffer, convinced that Filburt is an alien, intent on high-fiving the rest of them to death (just go with it), says the phrase to Filburt, in an attempt to trick him into revealing that he's an alien by way of understanding it. According to Heffer, "It's alien language, I heard it from [[Film/TheDayTheEarthStoodStill1951 a sci-fi movie]]."
* An alien species uses the phrase (actually, "Klaatu Nikto Barada", but close enough) as a greeting in an episode of ''WesternAnimation/AdventuresOfTheGalaxyRangers''.
* Bat-Bat turns it into a malapropism in the Bakshi MightyMouse episode "Bat With A Golden Tongue." Confronted by a figure who he thinks is not of this world, he chants "Klaatu! Baraga! Nicotine!"
* In ''JohnnyBravo'', Carl used this (amongst other sci-fi catchphrases) to greet an alien.
* In ''WesternAnimation/TheLegendOfKorra'', it is revealed that [[spoiler: the Avatar's struggle to maintain balance]] goes back to an ancient war between the spirits Vaatu and Raava, whose names are pronounced nearly identically to the first two words of the phrase.
* In ''WesternAnimation/TheSimpsons [[Recap/TheSimpsonsS19E5TreehouseOfHorrorXVIII Treehouse Of Horror XVIII]]'' Bart throws a ball hiting Kodos and Kodos "swears" with this.
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