History Series / PercyJacksonAndTheOlympians2023

** Percy doesn't has the ability to stay dry underwater as he does in the books, as it would likely be difficult and time consuming to convincingly dry Walker off after every underwater scene.

* BigScrewedUpFamily: The Olympians according to Ares, Percy's cousin. Long ago, Kronus, grandfather of Ars and great grandfather of Percy, ate his own children and Zeus started a war to free them.

** Clarisse is not exactly attractive according to Percy's description of her. Here, she's played by Creator/DiorGoodjohn, who is far easier on the eyes.

** Like Uma Thurman, Medusa is, for the second time, a young beautiful woman instead of a hideous old crone.
** Mr. D is not as chubby as Percy describes him as, something the books and the ''Sea of Monsters'' film adaptation kept true to. Here, he is ''very'' thin.

* AdaptationalConsent: Medusa implies that her relationship with Poseidon that led to her current condition was not entirely consensual, and from her point of view considers both herself and Sally to be his victims (although there is no indication that Sally's relationship with him was non-consensual). This is in contrast to her book counterpart who implied that her relationship was entirely consensual.

** After being bullied by Nancy, Grover suggests to Percy that he should go see [[Literature/TheKaneChronicles Mr. Kane]]. Whether or not is the father of Carter and Sadie Kane is left for guessing.

* SadlyMythtaken: Chris claims that Oizys is the Greek Goddess of Failure; she's actually the personification of pain, misery, and distress, all things that can ''result'' from failure, but not failure itself, though this could be a case of DeadpanSnarker in his case.

* WithFriendsLikeThese: Who needs Grover? Or at least that’s how Percy felt when he turn-coated him in the first episode.

** Annabeth manages to kill one of the Furies during the brawl on the bus by [[ThrowingYourSwordAlwaysWorks throwing her knife at her.]] In the books, Percy killed her with Riptide.

** [[spoiler: After retrieving Ares's shield, the God of War gives the trio the objective of getting to the Lotus Casino and meeting with Hermes so that his personal driver can quickly get them to Los Angeles; in the original novel, they ended up in the Lotus by sheer coincidence while looking for a place to rest, and Hermes doesn't show up until the second novel.]]

** In the books, Zeus is a long haired, long-bearded old man. In the first season, he's played by the late Creator/LanceReddick, who is bald and clean-shaven.

** [[spoiler: Episode 5 sees Creator/TimothyOmundson appearing as Hephaestus as he tries to stop Annabeth from freeing Percy from the trap in Waterworld; Hephaestus doesn't appear in the flesh until the fourth novel. A mechanical rhino that might be one of his constructs is observed by Percy in his youth.]]

** Percy's sword was named as "Anaklusmos" (Greek for "Riptide") when he received it in the original novel, but it's yet to be named in the show.
* AdaptationInducedPlotHole: {{Subverted}}. In the books, the Arch was just the Arch. However, in the series, the Arch is a temple to Athena. When Echidna and the Chimera enter the Arch, Grover is confused, because monsters can't enter a god's temple unless the god gives them permission, and why would Athena give Echidna permission to kill her daughter? However, with horror, Annabeth learns Athena was embarrassed by the fact that Annabeth let Percy send Medusa's head to Olympus, and that this is her punishment.

** In the books, Annabeth's father was reluctant to take Annabeth in when Athena delivered her to him, and this was a source of angst for Annabeth as she felt it meant her father never wanted her. In episode three, Annabeth mentions to Percy that her father did take her in and "treat her like a gift" with things only starting to fall apart after he moved on and got married to Annabeth's stepmother.
** ''Medusa'' of all people gets this, saving the trio from Alecto and offering them food. Whereas the books followed the more classical version of Medusa's myth-- an irredeemable monster who was cursed to turn people to stone-- the show seems to take more inspiration from Ovid's interpretation, where she was made monstrous by Athena after being victimized by Poseidon. [[spoiler:While Percy of course has to obliterate her, she comes off as sympathetic and at least somewhat nuanced.]]

** Gladiola the poodle is absent, though in the flashback in Episode 4 young Percy's swim trunks have a poodle design as a MythologyGag.

** Statues of Riordan and his wife, Becky, appear in the third episode as part of Medusa's collection.

* TheMountainsOfIllinois: Due to the series being shot in Vancouver, where the 20th Century Fox adaptations were also filmed, the portion of New Jersey where the main trio encounters Medusa is a pine forest unlike any found in that climate. {{Lampshaded}} by Percy:
--> '''Percy:''' "I didn't even know they had forests in New Jersey, but we found one."

** In the book, Percy jumps from the Gateway Arch directly into the Mississippi River to escape the Chimera - which would be impossible in real life since the river is actually several hundred feet from the Arch instead of under it. The show instead has Poseidon save Percy by summoning a waterspout to drag him into the Mississippi River and properly heal him.

* AdaptationalLateAppearance: While the Fates don't appear in front of Percy on the way home from Yancy Academy, they are still confirmed to appear in episode 5.

** The cast list spoils that Creator/TimothyOmundson is going to be portraying Hephaestus, who doesn't appear in the flesh until the fourth novel. A mechanical rhino that might be one of his constructs is observed by Percy in his youth.

* ClassicalChimera: The Chimera herself menaces the heroes in the fourth episode, first attacking them onboard a train and following them to the Gateway Arch. She largely resembles a scaly greenish colored lioness with a pair of goat-like horns on her head alongside a cobra-like hood, the ability to breath fire, and the traditional 'snake head for a tail' replaced with a scorpion-like tail.

** In the book, Percy jumps from the Gateway Arch directly into the Mississippi River to escape the Chimera - which would be impossible in real life since the river is actually miles away from the Arch instead of under it. The show instead has Poseidon save Percy by summoning a waterspout to drag him into the Mississippi River and properly heal him.

* NoSmoking: Due to Disney's anti-smoking policy, Gabe is not seen without his cigar.

* ClassicalChimera: The Chimera herself menaces the heroes in the fourth episode, first attacking them onboard a train and following them to the Gateway Arch. She largely resembles a scaly greenish colored lioness with a pair of goat-like horns on her head alongside a cobra-like hood, the ability breath fire, and the traditional 'snake head for a tail' replaced with a scorpion-like tail.

* ClassicalChimera: The Chimera herself menaces the heroes in the fourth episode, first attacking them onboard a train and following them to the Gateway Arch. She has a scaly greenish tinge to her coloring, has a lioness-like head with a pair of goat-like horns on top, and can breath fire.

Now the young demigod must lead a quest with his two friends -- Grover (Aryan Simhadri) the satyr and Annabeth (Leah Sava Jeffries) daughter of Athena - across America to prevent a war among the Olympian gods and restore order between his father and uncle.

** Annabeth wants to visit the Gateway Arch in St. Louis to admire its architecture in the original novel; in the show, it's a secret temple to Athena, built by one of her demigod children, and they main trio visit it in an attempt to seek sanctuary from Echidna and her chimera. [[spoiler:Unfortunately, Annabeth has incurred her mother's wrath by going along with Percy's scheme to send Medusa's head to Olympus, and that sanctuary is immediately revoked]].

** [[spoiler:In the novel, Percy plunged directly out of the Gateway Arch and into the Mississippi river below; this is a geographical impossibility in real life, so instead, Poseidon sends a waterspout to grab him and drag him into the river as he's falling.]]

** The cast list also spoils that Creator/TimothyOmundson is going to be portraying Hephaestus, who doesn't appear in the flesh until the fourth novel. A mechanical rhino that might be one of his constructs is observed by Percy in his youth.

* ClassicalChimera: In the trailer, what is implied to be the Chimaera at the Gateway Arch is shown briefly in at least three shots. From what is seen, the creature is shown to have a scaly greenish tinge to its coloring, has a lioness-like head with a pair of goat-like horns on top, and can breath fire.

** BeethovenWasAnAlienSpy: He's not named, but dialog implies that Eero Saarinen, the architect behind the Gateway Arch in St. Louis, was a child of Athena.

** ''Medusa'' of all people gets this, saving the trio from Alecto and offering them food. Whereas the books followed the more classical version of Medusa's myth-- an irredeemable monster who was cursed to turn people to stone-- the show seems to take more inspiration from Hesiod's interpretation, where she was made monstrous by Athena after being victimized by Poseidon. [[spoiler:While Percy of course has to obliterate her, she comes off as sympathetic and at least somewhat nuanced.]]

** Annabeth wants to visit the Gateway Arch in St. Louis to admire its architecture in the original novel; in the show, it's a secret temple to Athena, built by one of her demigod children, and they main trio visit it in an attempt to seek sanctuary from Echidna and her chimera.
* AdaptationDeviation: [[spoiler:Percy sending Medusa's head to Olympus isn't directly addressed in ''The Lightning Thief'' until the very end, but in the show, the gods see Percy and Annabeth as impertinent, which causes Athena to allow the Chimera into the St. Louis Arch, which is normally a temple that monsters can't enter.]]

* AdaptationalSuperpowerChange: While in pen form, Riptide will vibrate whenever it detects a monster nearby, an ability it doesn't have in the books.

* AdaptationalLateAppearance: While the Fates don't appear in front of Percy on the way home from Yancy Academy, they are still confirmed to appear in episode 5.

** The Three Fates cutting a string in front of Percy are a major catalyst for Grover wanting to get Percy to camp as soon as possible, but they're so far not present in the adaptation.

* AdaptationalLateAppearance: While the Fates don't appear in front of Percy on the way home from Yancy Academy, they are still confirmed to appear in the first season.

* AdaptationalContextChange: Clarisse had a rivalry with Percy in ''The Lightning Thief'' after trying to give him a swirly as an 'initiation ceremony' ends with Percy dousing her and her cabin-mates. In the show, she's gunning for Percy because she believes he's lying about slaying the Minotaur for the sake of ''kleos'' -- the Greek concept of glory.