You're viewing a scene from the fourth episode of Teen Wolf. It's a hot and heavy one!
Added:

Teen Wolf Season 1 Episode 4 Quotes

Derek: It was a different kind of bullet.
Stiles: A silver bullet?
Derek: No you idiot.

If you go to her house today and squander that colossal opportunity, I swear to God I'll have you de-balled.

Stiles