greatest sci fi shows of all time

1 - STAR TREK (1966-1969)
Any other choice would be illogical. And dispassionate.
2 - STAR TREK: THE NEXT GENERATION (1987-1994)
Lightning never strikes...thrice?
3 - FIREFLY (2002-2003)
Maybe they would have gradually run out of creative juice, and been merely good? One reaches for consolation as best one can.
4 - BATTLESTAR GALACTICA (1978-1979)
You had us at frak.
5 - BUCK ROGERS IN THE 25th CENTURY (1979-1981)
Top five, despite a titanic (in the unfortunate sense) second season.
6 - STAR TREK: ENTERPRISE (2001-2005)
Does bakula not realize how superior this is to his other sci fi series? Do you?
7 - LAND OF THE LOST (1974-1977)
Isn't it time for the holly and cha-ka spin-off?
8 - STAR TREK: VOYAGER (1995-2001)
A bit flaccid the first three seasons, but it soared the rest of the voyage home.
9 - BATTLESTAR GALACTICA (2004-2009)
Had it ended after two seasons, it would have placed higher than the classic. Plus, they never once say "felgercarb". I mean, that's just phasering yourself in the foot, right?
10 - THE BIONIC WOMAN (1976-1978)
It outshines the parent show because of the humanist touches mandated by star lindsay wagner.
11 - CAPRICA (2009-2010)
After a snoozy start, it blisters with brains and brawn.
12 - STARGATE: UNIVERSE (2009-2011)
Dark and desolate. The franchise kept getting better...yet progressively less successful.
13 - LOGAN'S RUN (1977-1978)
Surprisingly wild and wonderful...with the first female sci fi lead as strong and capable as her male counterpart.
14 - SPACE: 1999 (1975-1977)
Smarts (though sometimes dumbs), chemistry, and classic visuals. They overhauled season 2 with hoary hollywoodization...though not nearly so painfully as #s 4-5.
15 - STAR BLAZERS (1979-1984)
I could perhaps be taken to task for padding the list, but this one's a guilty pleasure. Have they released the unexpurgated version yet?
16 - PLANET OF THE APES (1974)
Not brilliant, but charming as heck. The irrepressible roddy mcdowall joins ron harper, the only actor to appear twice on this list (what, you were expecting dorn?).
17 - STARGATE: ATLANTIS (2004-2009)
Great characters, great drama, great visuals, okay writing...
18 - LOST IN SPACE (1965-1968)
Mindless, but masterful in premise, performance, and characterization. Couldn't we all use a robot who shouts "danger"? My romantic life would benefit tremendously. 
19 - WONDER WOMAN (1975-1979)
NOT a sci fi show...but apparently the producers didn't get the memo. See episodes 10-11,24-25,35,43,50,51, and 56-57.

Caveat: this reviewer hasn't seen BLAKE'S 7, LAND OF THE GIANTS, DARK ANGEL, THE CHAMPIONS, THE PRISONER, any anime since 1984, or either OUTER LIMITS.