The first ones I like a lot. The very first series, whatever it's called. So many of them I'm lost on their names. And you look at it now and think ''For that time, that's pretty damn ahead of itself.'' And they're fun, too at times. There's a certain episode I remember and it was this kid, he comes in, has this weird device and can manipulate people's thoughts and change himself into whatever he likes - and that was pretty engrossing.
The Original Series. Haven't watched all of it, just a few episodes. But what I've watched has been amazing, laughingly low budget, but still so capturing.
Deep Space Nine is the greatest thing I've watched on TV though, the first two seasons are so so, the rest of the seven seasons is nearly 100% amazing episodes.