I liked that Melanie asked Julia where Morgan was, if his body was possessed by somebody else. It's nice that somebody cares. On the other hand, she should be able to dig into her own experience of possession and find an answer - except that maybe she can't. Maybe she's asking for herself as well as for Morgan.
It appears that, in the seven (I think it's seven) previous times that somebody has spent the night in the Room, nobody went through the door that Morgan went through, because that appears to be the reason that Morgan was possessed by James Forsythe, and that apparently did not happen to previous Room entrants. I'm having serious trouble with this notion. I mean, Morgan does not strike me as the genius of the Collins family.