The Legend of Korra, Book 3: Change

Eska:
Why didn't anyone tell us we have a secret prison we could have been throwing people in?

Desna:
I'd like to put my tailor in here. He never gets my cuffs right. They're so creasy.

Zuko:
We built this place secretly with your father to hold a very special prisoner. She's a powerful firebender named P'Li who can create explosions with her mind. Ironically, I hired a guy with a similar ability to kill the Avatar myself once. [awkward pause] Didn't work.

Eska:
Don't feel bad. I tried to kill Korra after she ruined my wedding. It happens.

Tonraq:
Let's just focus on keeping this woman in prison.

[they enter the prison]

Zuko:
The intense cold prevents her from firebending.

Desna:
There's certainly no way anyone's breaking out of here.

Zuko:
That's what we thought about the other three prisons.

P'Li:
[shivering] Must be something exciting going on. No one interesting has visited me in 13 years.

Tonraq:
Don't get used to it.

P'Li:
He's out, isn't he? Mmm, I'm feeling warmer already.