Okay, there's just one thing that I'm not getting here. Why is the other universe's Harry affected, if that universe's Harry was the one tortured. I could see him inheriting the physical damage, since he's taken over a body with some mileage. If it's a completely different spirit, mind, soul, consciousness, etc. then the new one shoudln't be affected by the previous Harry's mental conditions. Unless there was pysical damage done to the actual brain, then there wouldn't be, at least I don't think there would. I'm going to go reread my textbook while I wait for the next chapter. It's highly possible that you know something about this that I don't, so feel free to ignore this at your discretion.
Also, a word of advice, you didn't have to post this unedited. All you had to do was write down the ideas you had for the next chapter, then come back and edit this one.