Lucy and Edmund Pevensie return to Narnia with their cousin Eustace where they meet up with Prince Caspian for a trip across the sea aboard the royal ship The Dawn Treader. Along the way they encounter dragons, dwarves, merfolk, and a band of lost warriors before reaching the edge of the world.

Lucy Pevensie: Will you come and visit us in our world?
Aslan: I shall be watching you always.
Lucy Pevensie: How?
Aslan: In your world, I have another name. You must learn to know me by it. That was the very reason why you were brought to Narnia, that by knowing me here for a little, you may know me better there.
Lilliandil: [Caspian, Edmund, and Lucy look up into the sky as a brilliant blue light descends upon them]
Lucy Pevensie: Look!
[the light transforms into Lilliandril]
Lilliandil: Travelers of Narnia, I am your guide.
King Caspian: You are most beautiful.
Lilliandil: If it is a distraction for you, I-I can change forms.
Edmund Pevensie, King Caspian: Noo!
[Caspian and Edmund look at each other. Lucy looks at them and rolls her eyes]
Gael: When I grow up, I want to be just like you.
Lucy Pevensie: When you grow up, you should be just like you.
[Eustace has been magically turned into a dragon]
Reepicheep: You know, extraordinary things happen to extraordinary people.
[last lines]
Eustace Clarence Scrubb: We spoken often of Narnia in the days that followed. When my cousins left after the war ended, I missed them with all my heart, as I know all Narnians will miss them 'til the end of time.
Eustace Clarence Scrubb: That giant rat thing just tried to claw my face off!
Reepicheep: I was merely trying to expel the water from your lungs, sir.
Eustace Clarence Scrubb: It talked! Did you see? Did anyone just hear that? It talked!
Telmarine Sailor: He always talks.
King Caspian: Actually, it's getting him to shut up that's the trick.
Coriakin: To defeat the darkness out there, you must defeat the darkness inside yourself.
[a bird lands beside Eustace and caws]
Eustace Clarence Scrubb: [about Reepicheep] In England, we have mouse traps for that sort of thing. Speaking of food, you don't know where I could get any, do you?
Tavros: Uh, why are you talking to that bird?
Eustace Clarence Scrubb: Uh, I just naturally assumed that you can...
Tavros: [busts out laughing] He's talking to birds!
Telmarine Sailor: He's mad as a loon, that one!
Tavros: Yeah!
King Caspian: [upon seeing Eustace, who has turned into a dragon] Anyone knows a dragon's treasure is enchanted.
Eustace Clarence Scrubb: [Frowns at Caspian]
King Caspian: Well, anyone from here.
[first lines]
Intake Officer: Are you sure you're eighteen?
Edmund Pevensie: Why? Do I look older?
Eustace Clarence Scrubb: What's so fascinating about that picture, anyway? It's hideous.
Edmund Pevensie: You won't see it from the other side of the door.
Reepicheep: Unhand the tail. Aslan the Great gave me this tail and no one, repeat, no one, touches the tail. Period, exclamation mark!
Dufflepud #2: [Eustace is snoring] It seems they've brought a pig with them.
Edmund Pevensie: So, what was it like... when Aslan changed you back?
Eustace Clarence Scrubb: No matter how hard I tried, I just couldn't do it myself. Then he came towards me. It sort of hurt, but... it was a good pain. You know, like when you pull a thorn from your foot.
Eustace Clarence Scrubb: What rubbish! See? That's what happens when you read all of those fanciful novels on fairy tales of yours.
Edmund Pevensie: There once was a boy called Eustace/who read books full of facts that were useless.
Reepicheep: We have nothing if not belief.
[from trailer]
Eustace Clarence Scrubb: This place just gets weirder and weirder!
King Caspian: I want you to know, I think of you as my brother, Ed.
[from trailer]
Lucy Pevensie: Edmund, the painting!
Lucy Pevensie: Thanks, Reep. I knew you'd come.
Reepicheep: Your Highness.
King Caspian: Now's the time to be strong. Never give in.
[from trailer]
Edmund Pevensie: Lucy, have you seen this ship before?
Lucy Pevensie: It's very Narnian looking, isn't it?
Reepicheep: No fear! No retreat!
Aslan: [from trailer] You have returned for a reason. Your adventure begins now.
[from trailer]
Edmund Pevensie: So, if there are no wars to fight, then why are we here?
[from trailer]
Edmund Pevensie: Squirt? I'm a king.
Lucy Pevensie: Not in this world.
Reepicheep: [listening to Eustace rant] He's quite the complainer, isn't he?
Edmund Pevensie: He's just warming up.
King Caspian: What sort of creatures are you?
Chief Dufflepud: Big ones. With the head of a tiger and the body of a... um...
Dufflepud #2: Different tiger!