- Designated Villain: Zobrist. He manages to solve world overpopulation without killing anyone (well, hardly anyone, and no one as a result of his virus). The only downside is that a large number of people won't be able to make new biological kids, but nothing is stopping them from adopting the countless preexisting children who don't have homes.
- Ensemble Dark Horse: Irrfan Khan as Harry Sims / The Provost has been selected out by every review of the film as the highlight of the movie, mostly because he's clearly having a ball playing this role. Others select Ana Ularu's Vayentha as a highlight for the movie with her badassery, steely glare, and Ularu's good delivery, although she sadly gets little screen time before falling to her death.
- Hilarious in Hindsight: In one part, Sienna asks Robert "if the only way to save the human race was to kill half of it, would you do it?" Five years after the book was published, somebody did.
- Home Grown Hero: The entire series can be summed up as 'an American scholar runs around Europe and uncovers Ancient Conspiracies left and right'.
- Just Here for Godzilla: Many Emerald City fans only watch the movie to see Ana Ularu in a different role. Context
- Nightmare Fuel: The dreams that Langdon has in the film, as a result of being drugged. Rivers of Blood, burning bodies, people fused into the ground, people walking around with their necks snapped around.
- They Changed It, Now It Sucks!: Dan Brown's attempt to make his work more mature by changing the formula and making it Darker and Edgier by having a Downer Ending net him mostly negative reviews.
- Unfortunate Implications: Apparently, the novel's description of Manila, where Sienna Brooks' Back Story took place, wasn't taken well by some Filipinos even though there is some slight truth in it. But again, that is how Dan Brown works.
YMMV / Dan Brown's Inferno