- Complete Monster: See here.
- Critical Research Failure: In Personal, Reacher tells us that adding 20% to a body's speed adds 400% to its kinetic energy. That should be 44% - good but not quite as impressive. Particularly jarring as Child consistently portrays Reacher as a mental arithmetic whizz.
- Heartwarming Moments:
- Usually when Reacher knows he's rescued everybody and everyone else is hugging their loved ones.
- Played with when Reacher travels to California in Never Go Back to see about a possible teenage daughter he never knew of. The brief moments he encounters and chats with teenage girl Sam Dayton about stuff suggests they might hit it off as father and daughter, except it turns out Sam's not his. There's a hint of regret in the narration when Reacher drives away.
- Padding: Child can get pretty obsessive about cataloging every single facet of a character's appearance, or a room, regardless of anything important to the story.
- Romantic Plot Tumor: Reacher's romances with the Girl of the Week are not exactly the most intriguing part of the series.
- Tear Jerker: Reacher, when he finds out the cop and the witness he's befriended in 61 Hours have been murdered. It's one of the preciously rare moments where Reacher genuinely feels despair.
- Alternative Character Interpretation:
- The accused sniper. Did he call Jack Reacher in because Even Evil Has Standards, as suggested by his partially guilt-driven breakdown upon waking up thinking he committed the crime? Or did he just want to ensure that his framers experienced Taking You with Me?
- A bit of Meta-Alternate Interpretation. The book Jack Reacher swaggers around because he's a huge mountain of muscle. By making that character played by Tom Cruise, it comes off more as Jack Reacher is The Napoleon.
- Might be the only time you'll hear someone in a modern film actually say, with no hint of irony, "I'm not a hero. I'm a drifter with nothing to lose."
- Tom Cruise for most of the part can put the Ability over Appearance but when a receptionist paints him as the guy who can kill a woman with his bare hands while hinting it is obvious by the looks of him, it's kind of ridiculous given Tom Cruise isn't exactly a powerhouse.
- One-Scene Wonder: Robert Duvall as the one guy in the world who can converse on Reacher's level, though technically he appears in at least three scenes.
- Tainted by the Preview: Fans of the books were livid about Tom Cruise's casting, as he looks absolutely nothing like the Reacher of the books (most notably, Reacher is huge, and his size is often an important part of his characterization).
- WTH, Casting Agency?: