Every past episode , it’s ended with a close up of Stiles not the possessed Stiles but the real Stiles looking at the camera with that “help. I’m trapped, I need someone to save me and I’m scared so please hurry before I kill everyone” look.
This one ended with “oh shit. He has Lydia. My heart just broke and I don’t care about me anymore, if she isn’t okay, I won’t be. If she gets hurt. I’ll die.” Look.