The UCC is a medium sized corporation that is slowly but surely growing to become a global powerhouse. It is deeply invested in legal, paramilitary, and criminal activities, and is composed entirely of clones.
With regard to the plot "Sleeping Mines of Elathon":
You manage to get the water wheel in the mine working which operates a pump to clear the flooded lower levels. As you explore the dank tunnels of the lower galleries, you can hear the creaking of the wheel above. You enter a low-ceilinged passage and are crawling on your backs, when the creaking stops. The water starts seeping wetly around the back of your head...