As we all know in the season finale of teenwolf premiering sunday someone is bound to die in this episode and i believe it to be issac

Exhibit A

This is isaac wearing a blue sweater vest getting shot with an arrow in the trailer promo for the master plan

Exhibit B

Isaac swinging at someone in werewolf form presumably allison

Exhibit C (proof that isaac may kick the can in the finale)

If you watch the sneak peak around the 14 second mark you can see allison stabbing someone in the neck as i froze it i realized it was none other than isaac even though we have seen werewolves have extreme healing factors maybe this is what the producers are using to truly bring allison to the darkside building up a character to make us love hime just so she can him off.Also this is my first article/blog leave comments on other theories