Receiving a straightforward explanation was definitely a relief after the more disjointed one that he'd endured from his roommate, and so Castiel nodded along as Barnaby explained. Unfortunately, the bottom line was more unsettling than he'd been prepared for. Turning people into monsters? That wasn't something that even an angel could do lightly; monsters weren't their territory. It wasn't Hell's territory either, for that matter. That was all left to the mostly unknown realm of Purgatory.

But this place had already managed so many things that shouldn't have been possible. Castiel had to wonder why he was still surprised at this point.

"That seems like a fair assumption, yes." If the patients fed into paranoia and ended up taking each other out, then that would probably satisfy Landel's sadistic leanings. The problem with the Head Doctor was that he was not nearly as predictable as those military types. He could have completely different motives or be functioning on complete whim.

"Do you know what kind of symptoms, exactly?" Castiel couldn't say if his long sleep or the pain in his head had anything to do with this, but he realized that he couldn't discount that possibility. The idea of an angel turning into a monster seemed ludicrous, but this place had already taken most of his power and made him think he was a human for a day. He wasn't going to take any chances from now on.