Dexter, Season 2

Dexter:
[about dead bodies] Are you hoping they'll talk to you?

Lundy:
The one's with heads anyway. They always speak, eventually. Just gotta ask the right question.

Dexter:
Which is?

Lundy:
Why were they chosen?

Dexter:
You looking for a pattern?

Lundy:
One doesn't kill this many people in this careful, methodical way without a reason. Some … twisted set of principles.

Dexter:
They would have to be twisted, wouldn't they?

Lundy:
The worst killers in history are usually the one's who think the murders were somehow … just. Even deserved. Leaders have slaughtered whole populations for the same warped reason.

Dexter:
But there's never any justification for killing.

Lundy:
No. Well, one, of course. To save an innocent life.

Dexter:
To save an innocent life.