Teen Wolf, Season 3

Derek:
Why shouldn't I kill you? How many of us have you murdered? You're not my ally! You're not my ally. You're a hunter.

Argent:
You're right. I am a hunter. Trained before I could even speak, and trained others. Do you know what the first lesson we teach is? We take our children, we bind them in a chair just like this. Then, we wait for them to get out. Most of them, it takes hours. Others? Seconds.

[He breaks free from the chair, grabs a gun hidden under the desk, and holds it under Derek's chin]

Argent:
I don't want to kill you, Derek. Don't make me kill you. Please.