Ron: Let me get this strait. Sirius Black has escaped from Azkaban to come after you?
Hermione: But they'll catch Black, won't they? I mean, everyone's looking for him.
Ron: Sure. Except no one's ever broken out of Azkaban before, and he's a murderous raving lunatic.
Harry: Thanks, Ron.
On the train back to Hogwarts Harry tells Hermione and Ron of his predicament.