Hmm! I was going to say how this was another dull episode - the old going down a mine filled with alien creatures, the inevitable cave in, and the old Scooby Doo, splitting up and getting lost routine - but after reading the Hullen spoiler thread I can see that this is an important episode for setting that story up - the dead monk with the scroll and the larvae with the green goo inside. I'm still not clear why Dutch had the hallucination. Is that realted to the green goo, and why D'avin had a vision of the monks after they put it inside him at Red 17?
Those buggers are full of green plasma, which causes the hallucinations. Previous team had the hallucinations and that's why they were killed.
Khlyen was very smart. When he realised D'avin was immune, he took measures and provided him useful information to protect Dutch.