Stiles has been a crucial member of this pack since the very beginning. He is Scott's right hand man, and there's no way he would miss this final showdown with Gerard, even if it means facing his fears.
Scott McCall has been through a lot since becoming a werewolf. We've watched him become a true alpha and lead a pack of his own. Now, he faces his toughest challenge yet -- stopping the anuke-ite and Gerard.
Sheriff: What in the hell were you two thinking? Scott: We were just trying to help. Sheriff: Why don't you try and help me understand what the hell happened here? Stiles: Yeah, well, we were trying to gently persuade him to pull over.