The 1980's version - that's when they reached Earth and it was early 80's los angeles or something. So bad - I remember it though.

Watch the mini-series first. Basically, the series picks up seconds after the mini-series, and it sorta has a "shocker" wow moment at the end that makes watching the series so much better. Yeah, the mini got great response so they picked up the show - it was basically a pilot, I guess. Ya, shit is good! But don't cheat and watch ep 1 until you've seen the mini or you'll spoil shit.