Roarty gets more extreme post from the Bogmailer, and decides to take more extreme action, meanwhile Potter gets some life changing news.
If I'm honest, I found this final part slightly disappointing, I went into this final part with lots of questions and ideas, not just the identity of the Bogmailer but other things such as Roarty's motivations, Potter's presence etc.
Unfortunately I don't think this delivers, it still has too many questions left unanswered. It seems to end abruptly, just when you think they're going to explain more the credits roll.
It's not bad, it's decent, the first two parts deserved a better finale, 5/10.