I've moved past that point, guys, but in vain too :( I'm a VL and the problem with this fight starts right at the beginning of the fight - just instantly after a quest update text when I enter the chamber with frozen Falmers Serana becomes hostile and attacks me. Then I'm killing all falmers and frost atronach, and the boss destroes the dome of the chapel, revealing the battlefiled to the sky. There goes a script where my character comes to first person view and crambles to the ground. And that's it for me - I've seen the YouTube walkthrough, just after the player falls, Serana crouches next to him and asks if he's OK, and then calls to fallow her to hte balcony. The boss is idle and the talking part starts. But not in my case. In my version of the buggy game Serana never asks if I'm ok, she stops being hostile to me, but she rushes on a boss and they start to fight endlessly, and I myself can move but cannot attack, cast spells, use powers or even draw my weapon. That's a f***ing epic fail, Bethesda!!!! I tried to disable all mods, making clear save and re-running all the Chapel - to no use :( It's obviously a default game scripting bug, so I'll stop playing Skyrim until a patch is out :( P.S. I too don't want to skip part of a game with setstage command, so I'll wait for a patch or a community solution. I have more hope for the Unoficial Dawnguard patch then Bethesda, though. I'll contact this mod's authors and ask them to look into this bug.