THE OUTER LIMITS.
The Zanti Misfits &
Cold hands, Warm Heart creeped me right the frak out when I first saw them on reruns years ago. I had nightmares of the little misfits crawling out from under my bed a few times.
Firefly & Serenity rank highly as televised Science Fiction in my book. In no small part due to the sets and props having that "lived in" look so oftem missing from other SF. The characters were not mostly perfect with occasional flaws like Star Trek so often had, but felt like real people who made real (and sometimes bad) choices and had to live with them.
I think there where two tracks in TV SF starting in the late 70s. The pretty, expensive effects, generally flat stories and characters characterized by BG:TOS > Space:1999 > ST:TNG > Space:A&B; and the grungy, low budget (at least in visual feel), stories and characters with depth as seen in Dr Who:Peter Davidson years > Babylon 5 > Crusade > Farscape > Firefly.
There were cross overs in the tracks of course, Moment of Beauty/Uglyness if you will.
A good scene from B5:...
Flounder looks SICK, having lost the weight the D-Day put on by then.
Another good bit from B5:
http://www.youtube.com/watch?v=W8oF0i5nvPIFarscape too weird? What is weird about Farscape?
http://www.youtube.com/watch?v=GQo9_VI6TnA&feature=related