WARNING: The following article contains major spoilers for Chaos Walking, in theaters now.

The dystopian science-fiction movie Chaos Walking, starring Spider-Man's Tom Holland and Star Wars' Daisy Ridley, is based on The Knife of Never Letting Go, the first novel in a trilogy by Patrick Ness. However, major changes were made to the story for the movie adaptation that make it practically impossible to continue the story in additional films. Most notably, the film rushes to the conclusion of the conflict between protagonists Todd and Viola and their enemy Mayor Prentiss. Yet, that isn't the only difference between the book and the movie, and many of those changes led to numerous plotholes that made Chaos Walking more confusing than it should have been. Here are some of the most noteworthy differences the movie made to the book.

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Todd's Age and Possible Fate

Todd in Chaos Walking

One of the biggest changes is the movie makes Todd older than he is in the books. In the books, he is about to turn 13, an age when all boys in Prentisstown have to undergo a specific ritual to become a man that involves killing someone. Todd's adoptive dads want to save him from that fate, so they send him away.

In Chaos Walking, Todd is older, although he is still considered young in comparison to the rest of the inhabitants of Prentisstown. Mayor Prentiss also makes it clear he has special plans for Todd, but he never reveals what they are, only that he sees something special in the young man. It also isn't avoiding a ritual that sends Todd on the run, it's finding Viola and helping her escape from Mayor Prentiss, something that doesn't happen at the start of The Knife of Never Letting Go. This adjustment changes the story's inciting incident.

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The Cause Of The Women's Deaths

Hildy in Chaos Walking

One of the major twists of Chaos Walking concerns what happened to the women on the newly colonized planet. In the movie, Todd is raised to believe all women died when the native species on the planet, the Spackle, killed them following a war between Prentisstown and the Spackle. However, it's later revealed that the men of Prentisstown killed all the women because they couldn't see and hear their thoughts, while the women could see and hear theirs because of a phenomenon called "The Noise."

In the books, the explanation for Prentisstown's lack of women is different: the men in Prentisstown claim a germ spread by the Spackle killed all the women and infected men with The Noise. This causes the men to start a war with the Spackle to stop the deadly germ's spread and leads to Todd's belief he is carrying the disease. Ultimately, however, the story's big twist is the same -- the men of Prentisstown killed the women.

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Animals And The Noise

Tom Holland as Todd Hewitt in Chaos Walking.

In Chaos Walking, all the men have The Noise. As mentioned, the books attribute The Noise to a germ spread by the planet's indigenous species. Furthermore, all males, regardless of species, have The Noise. As a result, in the books, the thoughts of Todd's dog, Manchee, and other animals they meet in the woods can be seen and heard. The Noise extends to the Spackle too, who use the Noise to communicate with each other.

In the movie, all human men, but no other species, are afflicted with The Noise the second they break through the planet's atmosphere, making the planet itself responsible for it.

The Spackle's Role In The Story

Spackle in Chaos Walking

Chaos Walking's treatment of the Spackle is very different than the books'. In the novel, the germ that causes The Noise results in a war between the human settlers and the Spackle, which leads to the humans, led by Mayor Prentiss, capturing many of the Spackle and using them as slaves.

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On the other hand, the Spackle are nothing more than background information in the movie. Only one member of the species ever appears onscreen and it's not enslaved. As a result, the Spackle's importance to the story is eliminated.

Todd Meeting Viola

Viola and Todd in Chaos Walking.

Chaos Walking and the book depict Viola's entrance into the story differently. In the movie, Viola is part of a scouting shuttle that is sent to the planet to prepare for the arrival of the next round of settlers. After becoming the only survivor of a crash-landing and realizing the men of Prentisstown are dangerous, she goes on the run, with Todd's help.

In the book, Todd is already on the run when he meets Viola in the woods. Meanwhile, although Viola crash-lands on the planet, in this case, she was on a shuttle with her parents who die in the crash. In the movie, Viola's parents died on the spaceship on the voyage to get to the planet, an event that had nothing to do with her scouting mission.

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The Final Stand

Prentiss in Chaos Walking.

In Chaos Walking, Todd and Viola are sent to the town of Farbranch to find help. In the books, they also go to Farbranch, but after that the movie and the book go in completely different directions. The film sees the mayor of Farbranch send them to a third community called Haven. When Prentiss shows up at Farbranch, he continues to chase Todd and Viola until they all arrive at the first large spaceship that brought the human settlers to the planet. This is where the movie's final fight takes place, and Viola and Todd never make it to Haven.

This is not what happens in the first book, or any of them for that matter. Todd and Viola never stop at a ship to make contact with Viola's people in outer space. Instead, they continue running and eventually arrive in Haven. The twist is that Prentiss beats them there, declares himself the President of New World and captures both Todd and Viola. The movie rushes to the final showdown with Prentiss, eliminating a lot of the action from the books.

Directed by Doug Liman, Chaos Walking stars Tom Holland, Daisy Ridley, Mads Mikkelsen, Demián Bichir, Cynthia Erivo, Nick Jonas, Kurt Sutter and David Oyelowo. The film is currently in select theaters.

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