In the module Time:
How do you save Darren, once you are in the Past?

I have already killed the Boss and need to talk to Darren, but demons spawn in his house and he dies.
Which is why I get a suboptimal ending.
With an earlier save, before I cleared the dungeon, same problem.

In the module Buried Secrets:
Is the final boss "The Old One" defeatable by means, other than "dominate will", or "disintegration"?
It doesn't seem to take any damage.