Ian Hart: Professor Quirrell
Voldemort : There is no good and evil. There is only power, and those too weak to seek it.
Voldemort : Harry Potter. We meet again.
Harry : Voldemort?
Voldemort : Yes. You see what I've become? See what I must do to survive? Live off another, a mere parasite! Unicorn blood can sustain me, but it cannot give me a body of my own. But there is something that can; something that, conveniently enough, lies in your pocket!
Harry : Where's Hermione?
Neville Longbottom : Parvati Patil says that she wouldn't come out of the girls bathroom. She said that she'd been in there all afternoon, crying.
[Harry looks at Ron, who shrugs]
Professor Quirrel : [comes running to Dumbledore] TROLL IN THE DUNGEON! TROLL IN THE DUNGEON!
[Dumbledore and McGonagall stand up, all the kids stare at Quirrell]
Professor Quirrel : Thought you ought to know.
Dumbledore : [kids scream] Silence!
[everybody stops screaming]
Dumbledore : Please do not panic. Now, Prefects will lead their house back to the dormitories, and teachers will follow me to the dungeons.
[kids follow Percy, while Snape walks away and closes the door]
Professor Quirrel : TROLL IN THE DUNGEON! TROLL IN THE DUNGEON! Thought you ought to know.