History Film / TheVoyageOfTheDawnTreader

** In the book, Lucy finds a spell in Coriakin's house that will help her hear what her friends say about her. She uses it and then witnesses a friend being pressured into saying nasty things about her. Aslan later scolds her for this, and tells her that the friend did not mean the things she said. The book also shows her what would happen if she used another spell that would make her "beautiful beyond the lot of mortals". In the movie, this is replaced with the Susan nightmare sequence.

* BittersweetEnding: The threat of Dark Island is defeated, Eustace has become a Friend of Narnia, and Reepicheep makes it to Aslan's Country, but Edmund and Lucy can no longer return to Narnia although Aslan reassures Lucy that they will meet again. It also serves as one for the Walden Media series, providing a decent send off for the original cast but setting up a SequelHook for the Silver Chair that would never be followed up on.

** When Drinian mentions the possibility of encountering sea serpents, Edmund and Caspian scoff at him for believing in such superstitions.

** Also, [[spoiler:The Island Where Dreams Come True. Originally a very scary island, but only important because a lord was there. Now, it's known as the Dark Island and is the source of the evil mist]].

* BeautyEqualsGoodness: Eustace's dragon form is rather noble-looking creature, while the sea serpent is a hideous near-EldritchAbomination.

* BehemothBattle: There is a brief one between Eustace in Dragon-form and a Sea serpent.

* ChewingTheScenery: Eustace's temper tantrum upon coming aboard the Dawn Treader, and arguably a few other occurrences. This didn't stop with Will Poulter's physical acting; even when lacking the ability to speak, our dragon friend manages the odd nibble.

** Also the ''Minotaur'' amongst the crew mocks Eustace for asking ''a seagull'' if it knows where food is.

** The Minotaur Tavros and the faun crewmen were also created for the movie as the book had an all-human crew with the exception of Reepicheep, which ''does'' seem a bit odd for a Narnian ship.

* OurMinotaursAreDifferent: There are a couple of minotaurs in the film, one of them looks more like a goat rather than a bull.

** The argument at the Deathwater Island was just a random incident in the book, and implied to be partly the result of a sinister magical influence. In the film, it's the escalation of a lot of conflict that's been building up for a while.
** Eustace has his epiphany and is turned back from being a dragon before they've even left the island. Here, he doesn't get turned back until the end.