Prey, Crusade, Visitor: all examples of great shows that have gotten the ax after 13 episodes. It's unfortunate, really, because I've enjoyed watching these shows from taped episodes as well as showings on SciFi. Visitor is a very well written show, although iffy in a few spots. The actors did a great job, and I hope that they film either a few more eps or maybe a TV movie to tie loose ends.