Teen Wolf, 2x10, "Fury," aired 30 July 2012. L to R: Dr. Alan Deaton (Seth Gilliam) & Derek Hale (Tyler Hoechlin). Deaton: "What Peter managed to do doesn't come without a price. He'll be physically weak so, he'll rely on the strength of his intelligence, his cunning. He's gonna come at you, Derek. He'll try to twist his way inside your head, preying on your insecurities. He'll tell you that he's the only way you can stop Gerard. Do not trust him." Derek: "I don't trust anyone."