A man wakes up on an island off the coast of Seattle, unsure of who or where he is, unable to see in color, and with a strange mark on his body. But he knows everything, every single scene of every single movie, the composition of bullets from all sorts of RareGuns, the full history of Jack the Ripper, etc. He makes friends and solves crimes for the police.

The series was [[ScrewedByTheNetwork canceled by FOX]] and [[CutShort ends on a]] CliffHanger.

Not to be confused with the Franchise/MetalGear "John Doe" or ''Film/{{Se7en}}'''s serial killer.

NeedsWikiMagicLove quite badly.

!!Contains examples of:

* AmnesiacGod: [[spoiler:John's access to almost all the world's current collected knowledge pretty much makes him this.]]
* ArtisticLicensePhysics: John's science can be a little spotty at times.
* AscendToAHigherPlaneOfExistence: [[spoiler:What one has to do in order to gain all of the knowledge John now has.]] Then you have to "fall back to earth", so to speak.
* AncientConspiracy: PHOENIX.
* AwesomenessByAnalysis: He doesn't just know everything, he has the ability to apply that knowledge.
* BottleEpisode: Episode 9; "Manifest Destiny"
* BrainUploading: A scientist experimenting in this field is killed (by a religious fanatic not by the experiment). At the end, it is revealed that the scientist encoded his mind onto bar codes of several ordinary-looking items.
* BroughtDownToNormal: In one episode, [[LightningCanDoAnything a lightning strike]] causes John Doe to regain his color sight and lose his EncyclopaedicKnowledge of nearly everything. The status quo is restored at the end of the episode by another electric shock.
* CaliforniaDoubling: Vancouver variant. They got tricksy once with an exterior of the Lynnwood Hotel. Lynnwood is a town near Seattle, which lends seeming credence to the setting... except that the Lynnwood Hotel is indeed in Vancouver.
* ChewingTheScenery: John can get a little... emotional when angsting about his amnesia and special abilities.
* DeathAmnesia: [[spoiler:With a twist! John lost the memeory of his past life and ''gained'' knowledge about every thing else. After he came back of course.]]
* DeathInTheClouds: "Manifest Destiny"
* DoNotPassGo: Doe confronting a serial killer with all his abilities (living OmniscientHero, monochromatic vision) after faking his death and appearing behind him to tell him he has been caught. [[spoiler:The killer was faking it, by the way.]]
* DroppedABridgeOnHim: [[spoiler:Karen Kawalski.]]
* EncyclopaedicKnowledge: John Doe knows everything. Well, almost everything.
* EpisodeOnAPlane: With the tagline "How do you solve a mystery at 30,000 feet!?" The answer being, of course, by knowing everything, as usual.
* FirstEpisodeResurrection [[spoiler:The main character is the way he is because he was killed and resurrected, under the recollection theory that all knowledge is granted to a person when they die.]]
* FetalPositionRebirth: The pilot episode.
* HowManyFingers: One of the first signs of John Doe's unusual nature. He responds to the question using medical jargon to explain why the thumb is not technically considered a "finger."
* IAmWho: John's reaction when someone [[spoiler:tries to con him into thinking he's this or that person.]]
* InjuryBookend: The title character had his universal knowledge erased by lightning in the beginning of one episode, only to have it returned by getting electrocuted later in the episode.
* InstantExpert
* LaserGuidedAmnesia: John's one of the more unique cases.
* MrSmith: "John Doe" is, of course, a placeholder name.
* NoNameGiven: His name remains unknown (up to the point that the producers of the show never made one).
* OmnidisciplinaryScientist: Justified by the premise.
* {{Omniglot}}: Due to his OmniscientHero nature.
* OmniscientHero:
** The exact extent of his omniscience is a little vague. He doesn't know what his friends had for breakfast, for example, or top secret things about the president, or what tomorrow's lottery numbers will be. It seems to be: "Anything anyone could conceivably look up in a library, somewhere."
** Given the WordOfGod-established reason for his omniscience, an implicit limitation would be 'things that were known when he woke up on the island' -- which obviously wouldn't cover knowledge of things that hadn't happened yet (like his future friends' future breakfast, or tomorrow's lottery numbers).
*** On the other hand, this wouldn't explain why he couldn't answer Jamie's question regarding any secret government programs. It doesn't seem likely that certain knowledge that some people deem secret would be hidden from him.
* PutOnABus: John's girlfriend. The series was cancelled before it became clear whether or not it was a LongBusTrip.
* QuestForIdentity
* RetiredBadass: Digger.
* SpaceMadness: A metal dome in the forest turns out to be a simulated space vessel, in which astronauts have been confined for months to test the mechanisms and psychological hazards of a manned trip to Mars. Initial investigation suggests the crew have killed each other due to Space Madness from prolonged isolation [[spoiler: but it turns out their air-circulation system was sabotaged, causing a gas imbalance that impaired their reason.]]
* StalkerShrine: The protagonist has one about himself, as he tries to find clues about who he is. Upon discovering it, Karen comments that it looks like a serial killer's shrine.
* TheBartender: Digger.
* WordOfGod: Explaining a lot of things due to cancellation.