[ He sits, folds himself into a chair like he's half trying to own the room and then shrink away from it at the same time. Stiles pulls a piece of paper from his pocket where he's listed the following: hallucinations, impulsive behaviour, irritability & insomnia. He slides it across the desk and then drums his fingers across his knee. ]

I never told you the whole story when I came back. I did something bad for a good reason and we were told that things wouldn't be the same. But it's ... [ There's a clear and sudden agitation in his voice. ] It's all the time and I need to know if it's supernatural or --.

[ If it's something worse. So he looks to the window and then back at Chase. ] I've seen these symptoms before, before the werewolves and the monsters and the terror. Frontotemporal dementia. [ Running a hand through his hair. ] It's what my mom died of.