...so I can have an ending!

I'm a little late but I just watched Ep20 after a week long binge and I am kind of tense right now since everything is just now coming together and that's it. No more episodes to watch to see how things play out.

Does anyone have any good suggestions on other good sci-fi TV shows that actually have conclusions?

I've seen Firefly, Farscape, Defiance and several more but I thought it wise to knock out the ones that I expect would have been suggested right off.