The 2012 film Jack Reacher is based on Lee Child’s 2005 novel, One Shot, but the film makes 10 big changes to the book’s story. Child’s iconic Jack Reacher series has been adapted multiple times, including a sequel film, Jack Reacher: Never Go Back, and a television series by Prime Video simply called, Reacher. The various adaptations of Jack Reacher vary in their loyalty to Child’s novels, but all of them take some sort of creative liberty.

The 2012 Jack Reacher film is no exception, in fact, it might be the most heavily altered variation of the character and story. Jack Reacher holds onto the core of the story, and it definitely creates a solid semblance of the title character, but many changes are made that make the movie a bit more action-packed. Those changes also hurt the film at times though, often undermining the mystery or belittling the complicated plot from the novel. Whether for better or for worse, there are 10 major book changes that stand out in the 2012 film, Jack Reacher.

10 Jack Reacher’s Size

The first discrepancy that stands out is Reacher’s size in the book compared to the movie. Reacher is described as being 6’5 and close to 250 pounds, whereas Tom Cruise, who plays Reacher in the film, is around 5’7. This is significant because Reacher’s intimidating presence is a big part of his character in the books. His hand-to-hand combat ability is also a crucial element of the character, which is hurt by using a smaller actor. Tom Cruise’s height in Jack Reacher isn’t the most egregious book change, but it is notable. The decision to cast Cruise was likely made to bring star power to the film, which is understandable.

9 Reacher’s Kill Count

Another element that stands out is the amount of people killed by Reacher in the film. Over the course of One Shot, Reacher only kills four people. In the film, Cruise’s Reacher kills a countless number of adversaries. This change was definitely made to build up the movie’s spectacle, but it hurts the plot by making everything less realistic. Book Reacher kills when he must, but he is not a vigilante who goes around shooting every enemy he encounters. The Reacher in the books always arrests people when possible, but Cruise’s Reacher shoots first and asks questions later.

8 The Number Of Villains Who Survive

In Jack Reacher, Cruise’s Reacher tracks the shooting being investigated to a Russian gang. He locates the gang and confronts them, ultimately shooting all of them dead. In the books, however, Reacher kills a handful of the gang’s henchman and arrests the rest of them. This is another change that seems to have been made in order to increase the film’s spectacle. The producers of Jack Reacher likely felt that this would be a more climactic ending. It is probably more dramatic, but it makes everything feel less realistic.

7 James Barr’s Framing

The framing of James Barr (Joseph Sikora) is another aspect of Jack Reacher that is different from the book. In the opening montage of Jack Reacher it’s strongly hinted that Barr was framed, so the audience knows about it from the beginning. In the book, it’s believed he is guilty until about halfway through. Reacher himself is convinced of Barr’s guilt in the book, which is why he took the case in the first place. This change hurts the movie’s mystery, though it was probably done to save time, like most changes in Jack Reacher adaptations.

6 Helen Rodin’s Kidnapping

In Jack Reacher, James Barr’s attorney, Helen Rodin (Rosamund Pike), is kidnapped by the gang that framed him. In the book, however, it’s James’ sister, Rosemary, who is kidnapped. Rosemary is actually cut from the film entirely, which was likely a time-based decision. This is not a terrible change because it allows more time to build Helen’s character. It would be impossible to replicate the scope of characters from the novel, so some of them inevitably had to be cut, and Rosemary was probably a good choice for that. Even so, it is a significant departure from the book.

5 The Fates Of The Zec And Emerson

In the Jack Reacher film, Reacher kills both The Zec (Werner Herzog), the leader of the Russian gang who framed Barr, and Emerson (David Oyelowo), the corrupt cop working with the Russians. Neither of these characters dies in the book, however. Both are arrested at the end of the novel instead. The decision to kill off both characters was probably made to create some extra spectacle, but also to make the ending tidier. If both of them are dead, the film doesn’t need to hash out their fates any further.

4 Reacher’s Rescue Team

Although Tom Cruise’s Jack Reacher is surprisingly accurate, the character takes too much on himself in the film. The Reacher from the books is willing to work with others, as evidenced by the rescue team he takes with him to save Rosemary from her kidnappers. In the film, Reacher goes solo to save Helen and take out the Russians. Whereas, in the book, he takes Helen, Franklin, and Ann with him to save Rosemary. This is significant because of what it implies about Reacher being willing to work with a team.

3 The Book Has More Characters

One of the biggest differences between the book and Jack Reacher is that the book simply has way more characters. The Jack Reacher film is forced to cut a lot of characters in order to consolidate the story and fit it into the span of a movie. This is just the nature of adapting books for the movies, but it’s a shame that certain characters weren’t included. Most notably, Ann Yanni, an investigative journalist who helps Reacher with the case, does not appear in the film. Barr’s sister, Rosemary, is another notable exclusion.

2 The Motive For The Shooting

Another key difference between Jack Reacher and One Shot is the Russians motive for the shooting that kicks everything off. In the film, it basically boils down to The Zec trying to extort Oline Archer into selling her husband’s quarry. In the books, Archer’s husband is asking questions about The Zec’s business, digging around in places he should not have. The Zec has him killed in order to preserve his illegitimate construction business, then wants to take the quarry as a bonus. This decision was probably made to simplify the plot, which is a shame because the complex nature of this story is what makes it great.

1 The Sniper’s Location

In One Shot the sniper who frames Barr shoots his victims from a mere 35 yards away, which is significant because it implies the shooter missed one shot on purpose. In Jack Reacher, however, the sniper is shooting from across the river at a distance probably closer to half a mile, which would make his targets extremely difficult to hit. The point-blank distance at which the shooter fires from in One Shot is a critical aspect of Reacher’s investigation, so this is a highly significant change. This change was probably meant to make Reacher’s enemies look more dangerous, but it comes off as mildly absurd.