What are your top 5 sci-fi shows?

1) nBSG (The last ep. didn't do it for me, but R. Moore did it to himself)
2) Star Trek DS9 (Some hit and miss eps, seasons 3-7 top sci-fi without question)
3) Babylon 5 (Last season was rushed, very tight arcs, great show)
4) Farscape (Really innovative, but Sci-Fi execs messed it up by cutting into the budget)
5) Space: Above and Beyond - Only 2 seasons, cut due to poor timeslots, not because of the show's content...I feel it was the template for nBSG with it's miltary style of direction.