Night of the Sentinels: Part 1 - S1-E1
Character mistake: When Jubilee wakes up in the infirmary, the sphygmomanometer on her wrist has been applied over her gloved hand, which could cause a false reading. Beast is the X-Men's resident doctor, so presumably he's the one that applied it to her, so he should have known to remove her gloves first for more accurate readings. (00:08:24)
Night of the Sentinels: Part 2 - S1-E2
Character mistake: When Beast is uploading the virus to delete all the mutant files from the computer, Storm destroys the monitor with a bolt of lightning and says they have run out of time. Destroying the monitor wouldn't magically erase the files. While she may not know that, Beast definitely would, so at the least, he should have asked her to destroy the computer tower and hard drive as well. (00:06:13)
Character mistake: When Rogue asks Storm what her plan is for dealing with the closing walls, Storm says "You three stop the walls, I shall slow the ceiling." Besides Storm and Rogue, Jubilee, Jean Grey, and Gambit are also there, so Storm should have said "You four stop the walls." (00:03:12)
Days of Future Past: Part 2 - S1-E12
Character mistake: After Gambit escapes from Wolverine and Bishop, Bishop says to Wolverine "No wonder you sent me back to change the future, because everything that happens is your fault." Wolverine didn't send Bishop back to change the future. He insisted on going back himself, but Bishop forced Wolverine out of the mission and inserted himself into the role because he felt Wolverine was too old to succeed. (00:10:03)
'Til Death Do Us Part: Part 2 - S2-E2
Character mistake: In the establishing shot of the movie theater where the Friends of Humanity meeting is taking place, the word "Humanity" on the marquee is incorrectly spelled as "Humanty." (00:06:32)
Character mistake: In the establishing shot at the farmers market, when the camera pans all the way to the right, there is a booth advertising roasted nuts, and "roasted" is misspelled as "roasteo." (00:03:20)
Character mistake: When Carly expresses her relief to Beast that he is fine after he was attacked by the anti-mutant group, he incredulously asks her how she knew he was a mutant. Aside from the fact that the Friends of Humanity were openly calling him a mutant in her presence when they accosted him, Carly was shown touching Beast's hand earlier in the episode. Despite being blind, she would also know that Beast's fur-covered hands would be quite different from the hands of regular people she might have touched. Given these facts, Beast should not have been surprised that Carly knew he was a mutant. (00:03:25 - 00:08:40)
Mojovision - S2-E11
Character mistake: The label on the bottle that Major Domo gives Mojo reads "Mojos aniacid," when it should read "Mojo's antacid." (00:03:20)
Mojovision - S2-E11
Character mistake: When the title screen for Beast and Rogue's television program appears, Beast's real name of Hank McCoy is incorrectly spelled as "Hank Macoy."
Character mistake: When wondering how close they are to the top of the cliff, Xavier asks Magneto "How much further?" The word "further" is used for non-measurable or figurative advancement. He should have asked how much farther, as that refers to actual distance between objects. An educated man like Xavier would certainly know the difference between the two. (00:02:44)
Suggested correction: While "farther" is used for physical distance, further can be too, especially in British English. Farther also tends to be used for a measured physical distance, so if the actual distance isn't known, further can be used. What Charles said is grammatically correct.
The Phoenix Saga (4): The Starjammers - S3-E6
Character mistake: When Raza is firing the recalibrated stun ray at the X-Men, the control panel misspells "target" as "tareet." (00:08:10)
Savage Land, Strange Heart (1) - S3-E8
Character mistake: When Zaladane is placing the Garrok necklace around Karl Lykos' neck, she incorrectly refers to Garokk as "Garokkt." She's Garokk's high priestess, so she should definitely know his name. (00:04:12)
Savage Land, Strange Heart (1) - S3-E8
Character mistake: The sign advertising the New York City Comic Con has "NUFF SAIDI" written on the bottom. The second "I" in "said" is supposed to be an exclamation point. (00:04:39)
Character mistake: When Beast discovers that Iceman has escaped from the containment device, he takes several steps in the room before he even realizes that Iceman is gone. The device was not obscured by anything, so Beast should have realized as soon as he entered the room that Iceman was gone. (00:11:30)
Character mistake: When the two security guards are arguing over whether heat or humidity is worse, one guard says "It's midnight, and it's still 97°." However, moments before that the same security guard checked the temperature on his computer and it indicated it was 85°.
One Man's Worth: Part 1 - S4-E1
Character mistake: When the civilians are fleeing the coffee shop, there are two spelling errors on the coffee shop's marquee. Firstly, the name of the coffee shop is Rip Van Winkle, but on the marquee, Winkle is spelled as "Winkile." To the right of that, Coffee House is spelled as "Coffe House." (00:16:55)
Beyond Good and Evil: Part 2 - S4-E9
Character mistake: Wolverine refers to Psylocke as having black hair and Archangel refers to her as being raven-haired. She has purple hair. (00:11:55)
Character mistake: The Colonel states that Hilo, Hawaii is about 120 miles from Pearl Harbor. It is actually more than 200 miles. (00:03:25)
No Mutant Is an Island - S5-E4
Character mistake: When Cyclops demonstrates his power to Rusty to show him that he's also a mutant, he shoots an optic blast at a building and blows a gigantic hole in its facade. While the building had the appearance of being condemned, Cyclops had no way of knowing whether there were squatters inside. He could have seriously injured or killed several people for all he knew. (00:07:35)
Character mistake: Arkon asks Storm to rule by his side as Empress. After she agrees, he introduces her to the crowd as Queen. (00:19:10 - 00:19:45)