I know they had planned at least 3 more episodes in season 1, but for some reason didn't release them. I'm not sure whether they were actually filmed, except for no. 11. Which I'm pretty sure was finished.
aside from the obvious eye candy which in 2000/2001 when it was airing was more than enough for me i've always loved the plot of the show. yes a lot of the fights came off really tacky but that happens. it was a good premise and just like 99% of sci-fi shows it got mistreated by a network. i was actually watching Dark Angel this morning which is what prompted me to say that.