Okay, I spared Aryran, and am in the dungeon. I've found him, and have taken out all the guards.. BUT one of the two guards I fist-fought to escape, is still showing a red dot on the minimap. The quest has not advanced and I can't pick the guy up to carry him out. I've gone back to try and "finish off" the guard, and he's untargetable. I think I'm stuck. Advice?

First of all, you don't need to kill all the guards. Secound, i think you should find something first before you can pick him up. Check your quest journal.

My journal just says I need to kill all the guards. I've killed the Executiioner and looted everything I could find in that room. I don't know what I'm missing.

Did you try to kill the guards upstairs? after all you gonna cary him up ^^ and BTW...did you try to load you last save and try it again?

You are going the wrong way. The exit is up a corridor that off the room Aryan is sitting in.

If you stand directly behind Aryan, facing him, it is to your left.

*Facepalm* ah. that was it. Thanks!