Teen Wolf, Season 3

Isaac:
All right, I'll say it-- you look like you're dying. You're pale, and you're thin, and you look like you're getting worse. And we're all sitting here thinking it. When we find the other you, is he gonna look like he's getting better? What happens if he gets hurt?

Stiles:
You mean, if he dies, do I die? I don't care. Just so long as no one else dies because of me. I remember everything I did, Scott. I remember pushing that sword into you. I remember twisting it.

Scott:
It wasn't you.

Stiles:
Yeah, but I remember it. You guys gotta promise me-- you can't let anyone else get hurt because of me.