Harry Potter and the Prisoner of Azkaban2003

[Harry and Hermione enter the Shrieking Shack and find Ron in a room]

Harry:
Ron!

Hermione:
Ron, you're okay!

Harry:
The dog. Where is it?!

Ron:
Harry, it's a trap! [points to Sirius standing behind the door] He's the dog! He's an Animagus!

[Harry and Hermione look down on the floor and follow the paw prints to where Sirius is standing]

Hermione:
[protecting Harry behind her] If you want to kill Harry, you'll have to kill us too!

Sirius:
No. Only one will die tonight.

Harry:
Then it'll be you! [angrily rushes over to Sirius, holds him down, and threateningly points his wand at him]

Sirius:
[chuckles] Are you going to kill me, Harry?

Lupin:
[enters the room and disarms Harry's wand] Expelliarmus! [orders Harry to step aside] Well, well, Sirius. Looking rather ragged aren't we? Finally the flesh reflects the madness within.

Sirius:
Well, you'd know all about the madness within, wouldn't you, Remus? [Lupin smiles, helps him get back up on his feet, and they hug] I found him.

Lupin:
I know.

Sirius:
He's here!

Lupin:
I understand.

Sirius:
Let's kill him!

Hermione:
NO! I trusted you! And all this time, you've been his friend. He's a werewolf! That's why he's been missing classes.

Lupin:
How long have you known?

Hermione:
Since Professor Snape set the essay.

Lupin:
Well, well, well, Hermione. You really the brightest witch of your age I've ever met.

Sirius:
Enough talk, Remus! Come on! Let's kill him!

Lupin:
Wait!

Sirius:
I DID MY WAITING!!! TWELVE YEARS OF IT!!! IN AZKABAN!!!

Lupin:
Very well. Kill him. But wait one more minute, Harry has the right to know why.

Harry:
I know why! You betrayed my parents! You're the reason they're dead!

Lupin:
No, Harry, it wasn't him. Somebody did betray your parents but it was somebody who, until quite recently, I believed to be dead!

Harry:
Who was it then?!?

Sirius:
Peter Pettigrew! And he's in this room, right now! Come out, come out, Peter! Come out, come out and play!