I have a question for Adventure 4, however I think this was asked before but I'm unable to find it anywhere.
The chorus appears to the players in Location 12 as the father of Tannith. Don't the players recognize him as the chorus? Of course the chorus looks different, but at least the face should be more or less identical.
What I mean, do they have a chance to detect that the chorus is Tanith father, before Act 3.
I'd say no.
The Chorus is pretty degenerate (physically) by the time the party meets him. Plus they are only seeing memories of him, not the real thing, and memories can be distorted (especially when filtered through the hate of 500 or so people).