I recently watched all of CSI on Netflix. (But then, I hadn't seen it before.) This is what I do. Watch whole series. When I started Netflix, I watched all ten seasons of Stargate at a go, plus Atlantis. Just finished watching all of NCIS. Also rewatched X-Files through season 7 last year (those last two seasons are heresy to me). And for the Star Treks, I've seen most of TNG and two and a half seasons of ENT, but very little of the other two, so it should be interesting.