- Adaptation Distillation: The film cleaned up quite a few inconsistencies in the book, tightened the storyline considerably, and gave Andre Marek and Lady Claire's romance some much-needed depth, but at the expense of removing much of the fascinating exposition about time travel and Flanderizing the characters into stock stereotypes of their books selves. General audiences and critics alike panned the film, with many saying that at best it was So Okay, It's Average.
- Informed Wrongness: The book reveals that the Corrupt Corporate Executive who owns the Time Machine at the center of the novel is planning to market it to the rich and powerful, to host tour groups to the past. And That's Terrible, so much so that the heroes use the time machine strand him in the middle of the Bubonic Plague as punishment. Except, as the novel repeatedly reminds the reader, this form of time travel doesn't cause paradoxes because the past can't be changed: instead, it's more like traveling between identical Alternate Universes that are out of historical sync with one another (this is presented a little inconsistently, since the heroes first got involved via a letter from the past, but the book holds to that explanation regardless). So, apart from an assumed Alien Noninterference Clause towards those other timelines that doesn't actually exist in the book (since it takes place in today's world), there doesn't seem to be anything really wrong with his plan. It's just confirmed as wrong by the horrified reactions of the heroes. This apparently wasn't lost on the movie producers: The Film of the Book instead has the villain accidentally stranding himself in the past while trying to kill the heroes.
- Squick: The description of the tannery. Pretty much Truth in Television.
- The protagonists stumbling upon the dead bodies of a woman and her children.
YMMV / Timeline