->''"No one gets in, no one gets out."''

A location is isolated by means of locking every door/window/refrigerator/[[AirVentPassageway air vent]]/other entrance in the area so that no one can get in or out of the building. For the medical cases surrounding this, it is a quarantine. Armed guards may also be posted, depending on whether or not the military is involved.

When this begins, [[NeverTellMeTheOdds the odds are]] 99% someone will attempt a IndyHatRoll.

Also see: TrappedInContainment. Quite likely to result in FailsafeFailure or DidntSeeThatComing if the plot demands whatever is in [=lockdown=] escapes. [[IThoughtItMeant Has nothing to do with]] a certain [[WesternAnimation/TransformersAnimated Cybertronian bounty hunter]]. Often the preface for a BottleEpisode.

----
!!Examples:

[[foldercontrol]]

[[folder: Anime & Manga ]]

* ''Manga/MahouSenseiNegima'' has a set of [=Lockdown=] doors in [[GreatBigLibraryOfEverything LibraryIsland]], which Yue triggers upon having a HeroicBSOD when she discovers herself in a LoveTriangle involving her best friend and her teacher.
* An early episode of ''Manga/KeroroGunsou'' features the Hinata house going into [=Lockdown=]...because Keroro has a cavity. A cavity caused by tiny aliens, but still...
* In ''Anime/IrresponsibleCaptainTylor'', after Tylor is [[spoiler: kidnapped]] the command takes the opportunity to put the whole crew in quarantine because ([[BlatantLies they claim]]) of the alien virus [[spoiler: the crew were infected with to force him to surrender.]]
* NERV goes into [=lockdown=] in ''EndOfEvangelion''. It...doesn't work.
** Even in Rebuild , where the UN and NERV bases get extra funding, Angels still blast through blast doors like a torch to wax paper. Anything built by the hand of man slows Angels down at best.

[[/folder]]

[[folder: Film ]]

* ''Film/{{Quarantine}}'' (2008).
* ''TheAndromedaStrain'' (without human input).
* First ''Film/ResidentEvil'' film (without human input).
* ''Film/ANewHope'':
** "Close the blast doors!"
** "Open the blast doors, open the blast doors!"
* ''Film/WarGames''
* During the film ''Film/MenInBlack II'', the [=MIB=] [=HQ=] goes into Code 101 [=Lockdown=].
* ''Film/XMenOriginsWolverine'' when Wolverine is escaping the Weapon X facility.
* ''Film/TotalRecall1990'' (1990). Happens twice. Once when Quaid arrives on Mars and later when Cohaagen locks down a sector which has disobeyed him:
-->'''Technician:''' Sir, the oxygen level is bottoming out in Sector G. What do you want me to do about it?
-->'''Vilos Cohaagen:''' [as if obvious] Don't do anything.
-->'''Technician:''' But they won't last an hour, sir.
-->'''Vilos Cohaagen:''' Fuck 'em. It'll be a good lesson to the others.
* ''Warning Sign'' has a full quarantine [=lockdown=] in the Biotek facility. And apparently their employees are idiots, because they stare at the closing shutters and alarms in confusion, and then complain to the security guard that they are frightened of being ''locked in''.
* Averted in ''[[Film/TheBourneSeries The Bourne Supremacy]]''.
-->'''Landry:''' Have you locked down the area? ''(Bourne has just escaped)''
-->'''CIA Mook:''' This is Italy, they don't do [=lockdown=].

[[/folder]]

[[folder: Literature ]]

* Done in the Literature/AgentPendergast novel ''Literature/TheRelic'', with disastrous results.
* ''Literature/BlindLake'' begins with the entirety of the [=titular=] town being put under [=lockdown=] for an unknown reason.
* Happens for months to the city of Oran in ''Literature/ThePlague'', due to bubonic plague. The novel explores the psychological effects on the people within, who become pretty much depressed and gloomy.

[[/folder]]

[[folder: Live Action TV ]]

* The Lone Gunmen used automatic fire doors in the improvised [=lockdown=] of a pathogen-contaminated corridor when they made their HeroicSacrifice at the end of ''Series/TheXFiles''.
* ''Series/{{Scrubs}}'' had a quarantine. And an IndyHatRoll
* ''Series/{{Heroes}}'' had a [=lockdown=] in Level 5 to keep the bad dudes from getting out.
* The [=lockdown=] in the hatch in ''Series/{{Lost}}'' seems to shield the residents with blast shield. The previous Dharma Initiative resident used these shields as maps before the arrival of the protagonists.
* ''[[Series/TwentyFour 24]]''. CTU is locked down during the first season.
** CTU is locked down constantly, but it never seems to do any good actually stopping people from breaking in or out!
* ''Series/StargateSG1'' has a [=lockdown=] protocol, including StockFootage of the NORAD blast doors closing (see Real Life).
* The first (broadcast) episode of ''Series/TheOuterLimits'' from the '90s had a secure medical experiment lab that could be sealed and sterilized with microwaves.
* ''{{Spooks}}'' has done this twice. First with the VX episode "I Spy Apocalypse", and then with the episode with the crazy former spy, and the Princess Di conspiracy theory story.
* In ''Series/{{Bones}}'', the boys were sawing a bone that had some fungus in it, resulting in the team being locked down for Christmas in the Jeffersonian lab. It's first time we see Angela's father.
* ''Series/{{Torchwood}}'' had one that activated by reading poetry and could be removed by reading the ISBN number of said poetry anthology. (ItMakesSenseInContext)
* ''Franchise/StarTrek'' does this a few times. Notable because they also ''fail'' to do it a few times - when locking down the ship would have caused the episode to be very short.
* Happens in ''Series/{{Oz}}'' (and every other prison drama) when someone gets murdered or the prisoners riot.
* Parodied in a VerySpecialEpisode of ''Series/OneTreeHill'' where Jimmy Edwards shoots up the school. He doesn't understand how Keith is able to enter the school because...
-->Jimmy: '''The school's on [=lockdown=]!!!'''
* Happens a few times on ''{{Eureka}}'' with Global Dynamics.
* Purdey gets trapped inside a high-tech building that goes into [=lockdown=] in ''[[Series/TheAvengers The New Avengers]]'' episode "Complex".
* Happens in a few episodes ''Series/MyNameIsEarl'' when Earl is in prison for a crime that Joy committed.
* Happened in the ''Series/{{House}}'' season 6 episode "[[ExactlyWhatItSaysOnTheTin [=Lockdown=]]]" when a baby went missing.
* ''Series/{{Leverage}}'' episodes "The Inside Job" and "The Hot Potato Job", the gang trigger a [=lockdown=] deliberately inside a high-security company to distract the security surveillance from themselves.
* ''Series/{{Community}}'''s "Cooperative Calligraphy" Jeff calls one for the study room when Annie's pen goes missing.
* In the ''Series/{{Supernatural}}'' episode [[Recap/SupernaturalS09E02DevilMayCare "Devil May Care" (S09, Ep02)]], Kevin is locked in the bunker unable to contact anyone or open the door after the sensors detected the falling angels.

[[/folder]]

[[folder: Pinball ]]

* Occurs in ''Pinball/Terminator3RiseOfTheMachines'' during "Blitz", complete with an animation of blast doors closing.

[[/folder]]

[[folder: Tabletop Games ]]

* CityOfTheGods, a part of ''TabletopGame/DungeonsAndDragons'' Blackmoor series, locks down the corridors if the [=PCs=] set off the alarm and appear to either be escaping or have remained in full alert for too long.

[[/folder]]

[[folder: Real Life ]]

* In the U.S., due to the rash of school shootings most schools have a [=lockdown=] procedure that goes into effect if there's any report of a violent criminal or crime in (or even near) the school. All teachers are told to lock their doors until they get the all clear.
* US government buildings usually have [=Lockdown=] procedures as well, in case of workplace violence or terrorism.
* NORAD in Cheyenne Mountain has a [=lockdown=] procedure to isolate itself from the world, including sealing a huge blast door.
* Zoos have [=Lockdown=] protocols to isolate dangerous and volatile animals from contact with humans or one another, either during routine transfers between exhibits or in the event of an escape.

[[/folder]]

[[folder: Video Games ]]

* The vaults in ''VideoGame/{{Fallout}}''.
** After their defeat at Helios One and Elder Elijah's desertion, the Mojave chapter of the Brotherhood of Steel put themselves under [=lockdown=], also preventing any members left outside from returning.
* In ''VideoGame/SonicAdventure2'', the titular prison of Prison Island is locked down when Tails gets there. Also, the facility that Dr. Eggman breaks into to retrieve the secret weapon goes into [=lockdown=]. This time, you see a number of doors closing and hear a voice telling people to close them. (In both cases, the doors that don't succumb to you blowing off the locks open anyway just because you destroyed some G.U.N. robots.)
* ''MitadakeHigh'' begins with you in a locked-down school with the killer.
* ''VideoGame/DevilSurvivor'' takes place in the "Tokyo [=Lockdown=]", things get complicated and bad very quickly.
* Periodically in ''Franchise/DeadSpace'', the room Isaac is in goes into "quarantine" [=lockdown=]. The lockdown ends when he successfully defeats the Necromorphs that find their way in.
* ''VideoGame/PrisonArchitect'' allows the player to do this with a button that sets all doors in the prison to the "Locked in closed" position, so as to limit the potential damage an ensuing PrisonRiot is causing.
* A few times in the original ''Deus Ex'', usually at UNATCO HQ. As early as the very first mission, where "base is under [=lockdown=] until the danger's gone, Agent Denton", and later when [[spoiler: JC is captured by MJ12 and has to escape out of UNATCO. Getting the key for the front door from Alex Jacobsen is the only way out.]]

[[/folder]]

[[folder: Web Comics ]]

* In ''Webcomic/ElGoonishShive'' Moperville South school has a "standard [=lockdown=] procedure". This means suddenly every door is locked ([[http://www.egscomics.com/?date=2009-05-30 even ones without locks]]) and corridors are cut into sectors with SomeKindOfForceField. How can this happen? Because one of the teachers is a wizard.
* ''Webcomic/SchlockMercenary'' has the methods of "[[http://www.schlockmercenary.com/2012-06-05 [=lockdown=]]]" fitting for things like motile weaponized {{nanomachines}} (enacted through the next four pages).

[[/folder]]

[[folder: Web Original ]]

* [[http://www.collegehumor.com/video:1903837 "Mix Up at the Snack Factory".]]
-->"Mr. Cheezo, the workers aren't gonna make it out alive."
-->"Well, I guess we'll have to hire new workers, won't we?"
* Happens in episode 5 of [[Website/TheOnion Sex House]] when the contestants attempt to rise up against the host, although how much it was actually ''needed'' is debatable, considering the [[SealedRoomInTheMiddleOfNowhere house is locked down]] all the time anyway.

[[/folder]]

[[folder: Western Animation ]]

* ''WesternAnimation/YoungJustice'': In "Terrors", Amanda Waller locks down Belle Reve in an attempt to stop the mass breakout.
* The second ''Creator/{{Toonami}}'' AlternateRealityGame, titled ''[=Lockdown=]'', centers around the Absolution being trapped in a DerelictGraveyard, unable to move until [=TOM=] repairs the engines and the [=DOKs=] shut down the TractorBeam that's holding them there.

----