Man I love that show.
They show old episodes on Sci-Fi all the time.
There was one I saw called "the Gift" I think about an alien that came down to a mexican villiage and some <img src="/xxx.gif"><img src="/xxx.gif"><img src="/xxx.gif"><img src="/xxx.gif"> happens and they distrust him and kill him and it turns out they brought them the cure for cancer but burned it.
Yeah I liked that one.