[[quoteright:350:[[{{Series/Heroes}} http://static.tvtropes.org/pmwiki/pub/images/Gn_string_theory_2736.jpg]]]]
[[caption-width-right:350: He does that a lot.]]
->'''Roger:''' Look, there's coded messages everywhere! In the ''New York Times'', on the Internet, even in ''Catcher in the Rye''.
->'''Steve:''' Well, you ''did'' use an awful lot of ''string''...
-->-- ''WesternAnimation/AmericanDad'', "Bush Comes to Dinner"

Somebody's conducting an investigation - and every little bit of information could be the break they need. {{Red Herring}}s are flying left and right, and they need to get everything organized. What better way to do it than with a pegboard (or an entire ''room'') covered in pictures of people, maps of places, and cryptic hints? Often the items are related, and these relationships are expressed by a complex web of strings connecting pairs of items; thus the name.

An example of LawOfConservationOfDetail, as almost invariably every single item will be plot relevant - although it's not always clear whether it was all planned out meticulously in advance, or whether the writer decided to use the various random items on the board as jumping off points for future episodes. Fans will naturally [[ViewersAreGeniuses drive themselves crazy]] trying to [[EpilepticTrees figure out the relevance of every item]]. [[EveryoneIsJesusInPurgatory Don't stare at it too long, though.]]

Subtrope of RoomFullOfCrazy.

Not to be confused with the {{Webcomic}} ''Webcomic/StringTheory'' or [[EEqualsMCHammer actual particle physics]].
----
!!Examples:

[[foldercontrol]]

[[folder: Comics]]
* In ''Comicbook/{{Batman}}: Year Zero'', Edward Nigma's office at Wayne Industries contains a vast spiderweb of different coloured strings, as he tries to "solve" pretty much everything as though it were a riddle.
[[/folder]]

[[folder:Film]]
* PlayedForLaughs in ''[[Film/TwentyOnejumpStreet 21 Jump Street]]'', where Schmidt and Jenko create an elaborate web of students, with the supplier indicated by a question mark at the top.
--> '''Capt. Dickson:''' Who put this together, are you autistic?
--> '''Schmidt:''' It is artistic, sir.
--> '''Capt. Dickson:''' Cut the bullshit. I want to know who's the supplier.
--> '''Schmidt:''' We don't know. That's why there's a question mark on his face. That's not the way his face looks, that's just a question mark.
** In the [[Film/TwentyTwoJumpStreet second movie]], the web has all the suspects indicated with question marks.
* In ''Film/XMenFirstClass'', Erik has a minor one on the wall before going to the [[SwissBankAccount banker]].
* Leonard has one of all his current Polaroids in ''Film/{{Memento}}''.
* Holmes has quite an impressive string setup in ''Film/SherlockHolmesAGameOfShadows'', centering on Moriarty.
* In the Swedish original of ''{{The Girl with the Dragon Tattoo}}'' (cf. ''TheMillenniumTrilogy''), Mikael Blomkvist investigates the mystery by assembling all the pieces of information on his wall and connecting them.
* The title character of ''Film/JohnCarter'' has one of these.
* A variation occurs in the film ''Film/{{Spider}}'' where the titular paranoid schizophrenic protagonist has a penchant for creating webs with bits of discarded string as he [[UnreliableNarrator investigates]] the death of his mother during his traumatic childhood. As befits his character, the strings never connect up anything useful and his notes are complete gibberish.
* In Film/ABeautifulMind, John Nash creates these when investigating Communist infiltrations and conspiracies. [[spoiler:It all means nothing, however, as Nash is suffering from paranoid schizophrenia.]]
* Peter Parker has one in ''Film/TheAmazingSpiderMan2''.
[[/folder]]

[[folder:Literature]]
* ''Control'' by Victor Suvorov had the protagonist doing it as a part of her job in the ''secret'' SecretPolice, to track power groups within party, NKVD etc. First with photos on a stand connected by threads of relations, then she removed them all and remade as one interconnected web of small thumbnails all over several walls. It worked, though not as expected: a few bosses living in one city turned out [[RevealingCoverUp not to interact]] -- never met informally, nor even tried to bring each other down. Wherefore HilarityEnsues. The author was in military intelligence, after all.
* In ''[[TheDresdenFiles White Night]]'', Harry Dresden is investigating [[spoiler: his half-brother, Thomas]]. During the investigation, Harry snoops around the suspect's apartment, and stumbles onto one of these.
[[/folder]]

[[folder:Live Action TV]]
* ''{{Series/Heroes}}'': both Mohinder's map of specials, and Future Hiro's map of all time.
* ''[[FlashForward2009 Flash Forward]]'', blatantly following in Heroes' footsteps with Mark's Blackout wall. [[spoiler: A case could be made for D. Gibbon's "Garden of Forking Paths" as well.]]
** Mark's wall turns out to be [[spoiler:the key to determining the time of the next blackout.]]
* ''Series/StarTrekVoyager'', Time Fleet and the "Year of Hell" aliens has an automated version of this to keep up with their monkeying in the timescape.
* ''{{Chuck}}'', [[spoiler:when he is keeping data of the Intersect and Orion on the back of his Tron Poster.]] Granted, it's in marker, but it's the thought that counts.
* ''TheLostRoom'' has a couple maps of the objects, including how they supposedly relate to one another, and where they have been.
* The Major Crimes unit in ''TheWire'' tends to have a pegboard like this for each of their main targets. Unlike many of these examples, it's actually realistically and sensibly organized, with strings connecting people based on their positions in the drug organization's hierarchy.
* ''{{CSI}}'' has one. It was once PlayedForDrama in the episode ''"The Case Of The Cross-dressing Carp"'' when the mother of a victim saw one of the victims' friends (a scientist who was investigating the cause of [[spoiler: the water contamination which caused [[GenderBender the condition]] that caused him to be DrivenToSuicide]]) connected to him via a line and wrongly assumed he was a suspect [[spoiler: and shot him [[NiceJobBreakingItHero ending any chance of his work being used to prosecute]] the CorruptCorporateExecutive responsible for the water contamination]].
* ''NewTricks'' has one. Most episodes have a few scenes with the main characters sat around and one of them explaining what they've just discovered. They once discovered that [[spoiler: a retired fireman who was helping them was an arsonist when they realised he would have been able to find his targets after seeing their board]].
* In ''Series/ItsAlwaysSunnyInPhiladelphia'', Charlie does one of these when he believes he's uncovered a corporate conspiracy while working in the mail room.
* ''Series/KamenRiderDouble'' uses these in a meta sense; the second episode of each mini-arc starts off with a "corkboard" that shows the characters from the first episode and how they connect. [[spoiler:Then ''Movie Wars CORE'' shows the origin of the corkboard in-universe.]]
* Nick sets up one of these in ''{{Primeval}}'', trying to track the various anomalies across time and space. Later, [[spoiler:the characters discover a heavily upgraded holographic version of his chart brought from the future.]]
* ''{{Series/Supernatural}}'' presents a beautiful example of a string theory during the first season's first episode. The main character's missing father was investigating on a Woman in White, using his motel room's wall to externalize his deductive reasoning.
** Sam and Dean occasionally put these up in their motel rooms, which seems like a lot of effort for something you're going to have to take down in a few days.
* The episode of ''Series/{{Castle}}'', "Linchpin", briefly displayed a room that looked very much like the page image, as belonging to a statistics genius - the strings started at one murder, the branches were cause and effects, and they converged on [[spoiler:WorldWarThree]] at the other side.
* Charlie Crews on ''Series/{{Life}}'' has an entire room dedicated to finding out who framed him for murder.
* In the pilot of the 2012 spy show "Hunted", the main character Samantha owns a rather "off-the-wall version" in her Scottish hideout.
* In series 1, episode 13 of ''Series/{{Elementary}}'', Holmes is compiling one about Moriarty [[spoiler:after tearing down the one he made about Moran]]. The book-canon description of Moriarty as 'a spider at the centre of a web' makes these almost inevitable.
* ''Series/DirkGently'': used for the opening credits. Dirk keeps one on the wall, on which he puts everything that has happened in the episode whether or not it's relevant [[spoiler:it's always relevant]], and which he is seen painting over in the pilot episode, for a case which references [[MythologyGag an "electric monk"]].
* John's home computer wall in ''Series/AlmostHuman'' displays an electronic version as he tries to work out how his girlfriend used him to get police information to an organised crime group.
[[/folder]]

[[folder:Tabletop Games]]
* The Loom of Fate from ''{{Exalted}}'' looks a lot like this, with strings of fate representing the lives and destinies of all the beings under its purview.
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/{{BioShock|1}}'', Andrew Ryan has one of these in his office as an aid in figuring out who Jack is and why he's survived this whole time.
* Captain Price sets up one of these in ''ModernWarfare 3'' to track down Makarov. [[spoiler:After Soap's death, part of it doubles as a ShrineToTheFallen.]]
* There is one covering the walls of the [[spoiler:Task Force Aurora]] lab in the ''VideoGame/MassEffect3'' DLC ''Leviathan''. Fitting, seeing how this is basically an organization of kooks who believed in aliens--before the FirstContact. They have also believed in Reapers long before Shepard encountered Sovereign.
** In an aversion of the LawOfConservationOfDetail, some of the leads the team is following are {{Red Herring}}s that won't lead you to the objective. (In fact, if you try to cross-reference them all, you end up with no systems matching all the criteria. No wonder work was going slowly...) It's up to Shepard to either sort out which influences are genuine and which misleading, [[TakeAThirdOption or just go gallivanting around the galaxy]] in your CoolStarship and narrow the set of worlds down by yourself.
* The coroner in ''VideoGame/MysteryCaseFiles: Shadow Lake'' was using this method to try and figure out the mysterious deaths in her town. Cassandra Williams has a similar bulletin board in her motel room, but we never get a decent look at it so there's no telling if she was trying something similar or just trying to sort out the Ghost Patrol shooting schedule.
* In ''VideoGame/SamAndMaxFreelancePolice'', Bosco has it in his shop starting with season 2, detailing the connections between the villains from the previous season. It's rather outdated by that point, as {{lampshaded}} by Sam.
* In ''VideoGame/WatchDogs'', Aidan has one of these in the hotel room he's living out of. Oddly, he only references it a few times and you can't interact with it in-game at all.
[[/folder]]

[[folder:Webcomics]]
* In one ''Webcomic/QuestionableContent'' strip, when Faye is trying to explain the main character's relationships to one another, her therapist stops her so she can get thumbtacks and colored string and diagram everything.
[[/folder]]

[[folder:Western Animation]]
* The Question has one of these in JusticeLeagueUnlimited.
* WesternAnimation/Ben10UltimateAlien: Jimmy has one of these going for alien encounters, specifically involving those with the Omnitrix ensignia.
* In the ''WesternAnimation/AmericanDad'' episode "Bush Comes to Dinner," Roger determines Osama bin Laden's location by studying a variety of popular media which he's hung all over his attic. Cue the page quote.
* In ''WesternAnimation/{{Megamind}}'', Roxanne finds Megamind's plan lain out in one of these, but can't understand it at first. When she backs up for some perspective, she sees that the strings, rather than holding information, form a picture of the plan.
* The FBI had one to show [[WesternAnimation/TheSimpsons Homer Simpson]] to demonstrate the hierarchy of Fat Tony's mob. Emphasis on ''had''. Why, oh, why, did they have to pick that spot to keep their shredder?
[[/folder]]

[[folder:Web Original]]
* Reddit's [[http://www.reddit.com/r/FanTheories/ Fan Theories]] (e.g., WildMassGuessing) community includes some string theory as its header decoration.
[[/folder]]

[[folder:Real Life]]
* This is actually a decent way to demonstrate a relationship diagram for a database.
* Actual wall of string created by Australian serial killer John Bunting, which he called his "spider wall", and used to track the activities of people he would eventually murder[http://www.theage.com.au/articles/2003/09/08/1062901996929.html]
[[/folder]]
----