P.S. Don't mind a spoiler? Click here! (Link from here (with the same spoiler) on Mike Russell's Twitter feed. It's mentioned in the comments, too. (Further explainage: in case it's not clear, Mike came up with the design. He talks about it here.))
Edited To Add: Peter David, Writer of Stuff, quickly summarizes that finale (which the first person on the thread called "engrossing and infuriating").