- After learning that Tom Cruise played Jack Recher, fans of the novel set up a homepage on FaceBook. The name of this homepage is "Tom Cruise is not Jack Recher", to express their views on Krishnamurti. Ruth is dissatisfied with this character.
- In Lee Chad's original novel, Jack Recher is 6 feet 5 inches () tall and weighs between 210 pounds and 250 pounds (). And Tom Cruise's figure is far from the description in the original book.
- The film is the second directorial work of Christopher McCauley, the screenwriter of "The Very Suspect" and "The Target of Hitler".
- The first trailer for the film was announced on Tom Cruise's 50th birthday.
- Before Tom Cruise, actors such as Brad Pitt, Hugh Jackman, Jimmy Fox, and Will Smith all went to the crew to audition for the role of Jack Recher.
Jack Reacher behind the scenes gags
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Cash: This the lady?
Jack Reacher: Helen Rodin, Martin Cash.
Cash: A pleasure. You look like hell there, Army.
Jack Reacher: You asked if I was afraid I'd end up like Barr. I'm not. I'm afraid I'll end up like this guy.
Cash: There's a lot of dead bodies out here. So let's get to it.
Jack Reacher: We should probably go.
Helen: Wait. That's it? It's just over?
Jack Reacher: You'll be all right, counselor.
Helen: No. What if I need you? How will I find you?
Jack Reacher: You don't need me. Not anymore.
Cash: Get her number. Let's go!
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Jack Reacher: With a name like yours, you're gonna feel right at home.
The Zec: Prison? In America? A retirement home. If I go to prison at all.
Jack Reacher: You think you're gonna walk?
The Zec: You are a homeless drifter wanted for murder. Meanwhile, I am an old man in the wrong place at the wrong time. Thanks to you, who is left to say otherwise? Who?