The one where Harry and Draco have a nice, friendly chat.
Canonically in third year Harry is some dumb little kid.
Who seems to have forgotten what he did last year.
"Potter!" said Malfoy, interrupting Harry's walk away from their Care of Magical Creatures lesson, where they'd studied flobberworms for the fifth lesson running.
"Hey Malfoy" said Harry tiredly. "Last there was the beast of Slytherin, controlled by the heir of Slytherin, petrifying people. Remember that?"
Malfoy nodded slightly and rolled his eyes. "Yes Potter. So what."
"It was a sixty-foot basilisk, Malfoy" said Harry quietly. "I killed it. Your father knows all about it."
Malfoy crossed his arms over his chest "So what Potter"
Crabbe and Goyle folded their bulky arms over their chests and glowered down at Harry.
"Its just, you're not asking the right question" said Harry "You should ask yourself, are you more dangerous that a sixty-foot basilisk?"
Draco Malfoy's delicate brows furrowed then he blinked in sudden realisation.
"So drop the complaint about Buckbeak" said Harry tiredly "And I'll keep ignoring that your father planted the cursed object that brought the heir into the school. After all, is your father more dangerous that a sixty-foot basilisk?"
"Harry" said Hermione quietly into his ear "No."
Harry smiled and the smile did not reach his eyes.
Draco left, resisting the urge to say "Just wait till my father hears of this."
-==0==-
"So tell me, punk, are you more dangerous than a sixty-foot basilisk?" said Auror Harry Potter.
Everyone in the Aurors called him Dirty Harry after Hermione made Ron watch some movie.