Producer Simon Kinburg claimed the reason for Kitty's demotion was because of the way time travel powers work in the movie -- a character's mind travels back in time to possess its younger self, and Kitty wouldn't have been born in the '70s. Right, because you can completely restructure the characters in the story on a whim, but this made-up time travel mechanic is totally immutable. Obviously the real reason for the lead character change-up is that Fox knew a ripped-to-shreds Hugh Jackman would sell more tickets than an intangible Ellen Page. It was both the wrong decision for the story, and one that instantly made them $500 million. The term "Wolverine Publicity" is codified on TV tropes for a reason.

20th Century FoxHey, at least Kitty made the coveted "blurry bottom right corner" spot on the poster.

Tearing up a story to turn Kitty into Wolverine was more than just cosmetic. Wolverine had virtually no character arc in the film: he didn't grow or change or need to prove himself -- all things that made Kitty Pryde in the original Days of Future Past so interesting. For all the good it did the story, they might as well have replaced Kitty's trippy time-travel-facilitating role with a bong and some sitar music.

Now, we realize we're fudging the premise a little bit here. In the show, Cersei is not an overall weak character and this one moment doesn't ruin everything she's ever done. But this was definitely a weak moment, added in at the last minute by the screenwriters for no good reason. In the book, the scene was consensual. Still impossibly disturbing, but it acted as a perfect demonstration of Cersei's demented mental state and the twisted relationship with her brother. Take away her consent, and the most powerful woman in the books is transformed, at least momentarily, into just another victim.

HBO"I prefer to make victims."

And what about her character thus far made the writers think she'd just deal with that kind of violation? She had her husband killed and kick-started a massive war for basically the same behavior. If Book Cersei was taken against her will at her son's funeral, the next scene would be the Kingslayer getting dragged behind a horse by his dick -- which, knowing the tone of the show, is not entirely out of the question in future seasons.

In the cartoon, the earthbenders were being held on a prison ship. Since their powers were all about manipulating Earth, this rendered them effectively helpless. Katara brought coal onto the prison ship to give the imprisoned earthbenders something to use their powers on. Fairly clever, right? Well, to fully illustrate how stupid and arbitrary the film changes were, in the movie the earthbenders weren't held on a ship at all. They were just on regular land, otherwise known as the substance they have magical power over. The male lead, Aang, just pointed this out to them, and suddenly they could fight back. And what an epic battle it was.

Paramount PicturesVictory through riverdance.

And what does Katara get to do, during the scene she was originally central in? She runs forward and shoves an enemy soldier like they're on a playground and she likes him but doesn't know how to express it. Then she panics and forgets where she is until somebody rescues her from the man's terrifying counter shove.

Paramount Pictures"Don't make me bend my tears at you!"

Since stories about evil parents yanking out their children's eyes are loved by kids of all ages, they decided to turn Coraline into an animated movie back in 2009. In the book, Coraline proves herself to be extraordinarily independent and resourceful, defeating the Other Mother single-handedly. But the film added an entirely new character: a boy called Wybie.

Focus FeaturesA deus ex manchina if you will.

By the end of the film, it becomes clear that Wybie's purpose isn't just to be a sounding board -- he's also there to save Coraline's bacon. In one of the climactic scenes of the book, the Other Mother's disembodied hand comes to snatch Caroline away. It's a struggle, but she defeats it. In the movie, she mostly screams and cries until Wybie finally remembers he's got a girl-shaped anchor weighing him down, and comes to rescue the poor helpless dame from those wacky circumstances she keeps getting herself into.

In the book, Violet builds a grappling hook out of spare parts and scales the tower where her sister is held captive. She is caught and forced to sign the marriage contract, but cleverly exploits a technicality in it to avoid any pedophilia and infanticide. The day is saved by the bold and clever actions of a female character. In the film version, Klaus has to step in and do everything. He invents some kind of nonsense, climbs the tower, and happens upon a light refracting device, which he uses to burn the marriage contract.

Paramount Pictures"Take that, traditional marriage!"

Violet, once the hero, just immediately resigns herself to a life as a child bride. What else is she supposed to do? She's just a girl. To understand the full ridiculousness of this change, you need to remember that Violet was supposed to be the inventor of the family. Her brother was a 12-year-old bookworm whose main personality trait was literacy. If confronted with an imposing ziggurat on a rescue mission, he's the character that knows what that word means, not the one that heroically climbs it.

Paramount Pictures"Actually, I'm still the one that knows what it means. Why would we allow a woman to read?"

So the female character who once could have been described as "adventurous and inventive" can now be described as "wearing a dress" -- which meant the male character was now in possession of every single personality trait. Even the author of the book, Daniel Handler (Lemony Snicket is shockingly not his real name) snarked about it in the film's DVD commentary: "And now Klaus is apparently running off to go and save Sunny. In the books of course it is Violet, but I know that Hollywood prefers its female actresses to do very little."

Word up, Snicket.

Another female character from the original Sherlock Holmes stories, Irene Adler, didn't do too hot in the Sherlock show either. In the original story, A Scandal in Bohemia, Holmes was hired to retrieve a picture Irene was using to blackmail a king. But Adler outsmarts Holmes and gets away with the picture. The story ends on the quote:

"And that was how a great scandal threatened to affect the kingdom of Bohemia, and how the best plans of Mr. Sherlock Holmes were beaten by a woman's wit."

Not much ambiguity in that write-up. But in the Sherlock episode based on the story, "A Scandal in Belgravia," she gets captured by terrorists instead.

BBC"Let's have the woman character lose instead ... oh, and let's also put her in a burka and kill her!"

This time around, Sherlock ultimately outsmarts Irene. He swoops in to rescue her from execution, then gets the information she was trying to keep from him -- the direct opposite outcome of the original story. It gets worse: the thing that ultimately brings Irene down is she couldn't help falling in love with Sherlock.

"You could have chosen any random number and walked out of here today with everything you've worked for, but you just couldn't resist it, could you?" Sherlock says smugly to the defeated woman. "I've always assumed that love is a dangerous disadvantage. Thank you for the final proof."

BBC"I hope you learned a valuable lesson about getting feelings in your vagina."

Irene went from a smart, independent woman who ultimately defeats the hero, to a damsel-in-distress pawn just waiting for the hero to save her from her own stupid mistakes. She's basically the British dominatrix version of Princess Peach.

Caitlin Donovan can be found ranting about cartoons and comics like a child on her Tumblr Lady Love and Justice.

For more ways Hollywood destroyed characters, check out 5 Childhood-Ruining Appearances from Famous Characters and 6 Appearances by Iconic Characters That Ruin Your Childhood.

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Nightmarish villains with superhuman enhancements. An all-seeing social network that tracks your every move. A young woman from the trailer park and her very smelly cat. Futuristic Violence and Fancy Suits, a new novel about futuristic shit, by David Wong.