Touch of Madness Campaign, Con'td

On Sunday I met with a couple of my players for the next installment of Touch of Madness. We had some last-minute cancellations, but because of our dual-character system we were able to forge ahead with just two PCs. Spoilers ahoy!

An interesting facet of this particular module is that several of the "bad guys" - the Stormcrows - are actually victims of the "touch of madness" themselves, and therefore can be saved. So far, we have rescued three out of the four Stormcrows (if the PCs remember to go back and collect them on their way out, that is). As an aside, IMHO the two female NPCs seemed more salvageable than the male NPCs. Is this an indication of the "damsel in distress" mentality on my part? Or on the part of the writers of the story? Anyway, something to think about.

Either way, it is now incumbent upon me to write a story with 

all female monsters and a dude in distress.

In this session, the PCs advanced into the second level of the Forlorn Tower. They met two more of the Stormcrow mercenaries, and they confirmed that the Tear of Ioun is no longer there. However, since their primary goal is to protect the town of Wellspring from this tower's monsters, it makes sense to continue. I think we've got about one more session left, but I'm getting a bit nervous. With our spotty attendance, I'm not sure that all of my PCs are going to be at a high enough level to deal with the final battle. Will this be my first TPK???