Zack studied the others as they left group therapy. Some of them were trying to gain the doctors favor, but Zack had no desire to do that. Yes he wanted out as badly as they did, but he wasn't trusting the doctor to let him out just because he behaved a certain way. No there was a different way out and Zack was going to find it. Between Griffin's skills and his own they would be able to find a way out.