History AdaptationInducedPlotHole / LockeAndKey2020

** Also, how Dodge got his hands on the Gender/Identity Key: in the comic books, Ellie accidentally dropped her Keys in the Wellhouse after her mom hit her in the face; then, when Dodge's freshly-summoned Echo [[KickTheSonOfABitch snapped Candice Whedon's neck]], Ellie fled in a blind panic without picking them up. In the show, Ellie's first meeting with Dodge was conducted quite peacefully with no murders, with Ellie still being totally clueless about the fact that Lucas's Echo was possessed, even when he began demanding the Keys with open aggression, to the point that when asked, she just... handed over the Identity Key - which, unlike the Gender Key, offers ''literally '''unlimited''' '' opportunities for disguise.

** Also, in the comics, the Keepers are ''not'' fooled by Lucas's claim of being okay after being touched by one of the demons from beyond the Black Door, and are able to stop Lucas from attacking the sleepover party - Mark even holding him down with the Crown of Shadows while the memories of the Black Door are removed from Lucas' mind; as such, the deaths of "Dodge", Kim, and Mark are postponed until an epic battle royale a few days later. In the show, no precautions are taken whatsoever, resulting in Kim and Jeff being brutally murdered on the same night Dodge was possessed. Once again, the Keepers of the Keys end up looking like idiots.

** For that matter, it's not explained why Ellie would be allowed on the currently vacant Keyhouse grounds without getting arrested for trespassing; in the comics, she's been given a key to the gates and permission to visit by Duncan.

* Season 2 ends with the revelation that [[spoiler: Gabe]] is actually another one of Dodge's secret identities... but nobody thinks to ask where he lives or where he came from or any other basic questions about his past. Even when Kinsey becomes close with [[spoiler: Gabe]], the matter of his house is never brought up. And how the hell is he justifying himself to the high school that he apparently attends? In the comics, "Zack Wells" claimed to be a relative of Ellie Whedon and accordingly stayed with her, while providing the school office with faked records and killing off any teachers who got suspicious. By contrast, [[spoiler: Gabe]] appears to be relying on people around him not asking intelligent questions.

** Also, the attempted possession features Sam trying to kill Dodge. In the comic books, this made perfect sense, as Echoes can be killed via mundane methods despite their supernatural natures. However, in the ''show,'' Echoes are effectively invincible and can only be killed by forcing them over the Wellhouse threshold - and yet the episode attempts to play this as if Sam [[HopeSpot might actually have a chance to end Dodge's reign of terror once and for all]], even though Dodge has already demonstrated his invincibility on camera back in season 1 by casually taking six bullets to the chest.

* It's never explained why it was so important for Benjamin Locke to create a door for the portal in the first place, when it would have been easier to just seal the cave entrance. In the comics, it was necessary to keep the caves open because the militia were using it as a hideout and storehouse - vital resources in the American Revolution in the other words. ''Plus'', at the time, Keyhouse was occupied by the Redcoats, so the militiamen had nowhere else to go; faced with being possessed or murdered by the possessed, the militia would have had no choice but to surrender to the British, and the only reason why they didn't have to was because Benjamin was able to bar the door with the first Whispering Iron lock. In the show, Keyhouse is still in American hands and the British appear to be the underdogs, so why the hell would Benjamin have bothered to go anywhere near the portal ''ever'' again?
* Because the show never revealed that the adulthood-induced WeirdnessCensor was actually created by a Locke ancestor in the 1940s in order to prevent the Keys from being misused by adults, it's assumed that it's just a random fact of magic that nobody will ever understand... but it also means that the audience is left hopelessly baffled by the fact that Benjamin Locke started creating the Keys ''at the age of eighteen,'' the exact point where kids forget all about magic. Ditto the ghost of the elderly Chamberlin Locke, who died many decades before the Memory Key was even thought of.

* The Keepers of the Keys' decision to hide the Creation Key inside the mind of [[spoiler: Gordie Shaw]] has no counterpart in the comics: there, Rendell hid the Keys in Keyhouse and only resorted to such a risky move in the case of the Omega Key - which he hid [[spoiler: inside his own mind]] - because it was easily the most dangerous of the Keys and couldn't be left in Keyhouse. By contrast, the Creation Key is pretty benign and so the hiding place seems ridiculously excessive, not to mention exceptionally dangerous.

** For that matter, why [[spoiler: Gordie]] had to have his memory erased of magic. The nearest counterpart to this event in the comics was justified, because it was inflicted on ''' ''Lucas'' ''' immediately after he was possessed. There, the decision made sense because it was the only way to non-lethally pacify Dodge - before he recovered his memories and had to be killed for the first time. In the show, [[spoiler: Gordie]] is, not to put too fine a point on it, harmless and wouldn't be able to do much damage by revealing magic to the rest of the school because everyone would eventually forget all about it including the perpetrator. So, by all appearances, the Keeper of the Keys have essentially {{Mind Rape}}d a man for nothing.

* The true cause of Erin's catatonia. In the comics, [[spoiler: it's due to Dodge using the Head Key to literally empty her mind]]; in the show, [[spoiler: it's due to her being accidentally trapped inside her own MentalWorld when a maid at Keyhouse removed the key from her head... naturally raising the question of why Erin would have been stupid enough to use the Key with her body alone and unguarded - and why none of the Keepers of the Keys ever tried to help]].