This is an entirely subjective list, but I’ve tried to be fair: I’ve excluded children’s shows such as “Jason of Star Command” and sitcoms such as “Mork and Mindy,” which, though terrible, weren’t even *trying* to reach the bar. Also, I’ve decided to take the series individually, and not take “Star Trek” or “Stargate” as a whole, since the quality frankly differs quite a bit from installment to installment. I’ve also decided to exclude anything pertaining to Superheroes, Fantasy, and any marginal shows that were not primarily SF, but threw in one or two genre episodes simply ‘cuz, ya’ know, “The kids today, they love the star wars stuff…”
Counting down:
10) Galactica: 1980 (1980) The original series (1978/79) was much better than most people remember, and the new series is surprisingly good, but man oh man oh man, this ill-conceived 1980 attempt to keep the franchise alive sans any characters from the original show, and degenerated in the space of just one episode from a time travel series to a show about child care in space for irritating space orphans, many of whom were the producer’s own kids. http://en.wikipedia.org/wiki/Galactica_1980
9) Buck Rogers in the 25th Century (1979-1981) This series was made principally to amortize losses taken on the production of the original Galactica series the year before, this hour-long science-fiction adventure show provided no real adventure, and not much in the way of science fiction. The thinking seemed to be that if they dumbed-down “Galactica” a bit, they’d have more success on their hands and, sadly, they were right: It lasted two years. There was lots and lots of bad acting, an irritating robot, a charmless male lead hampered by embarrassing scripts and lots of chicks in spandex. That part was pretty good actually. Things got even worse in season two when the show became an even-stupider clone of Star Trek, and they added an even-more irritating second robot. Buck Rogers Wikipedia article (And honestly, how can a guy who’s pushing 40 still be only an Air Force captain? Sheesh!)
8) The Powers of Matthew Starr (1982/83) Fresh off his Academy Award for “An Officer and a Gentleman,” Louis Gossett, Jr. Proved he had no freakin’ clue how to have a successful career by signing on to co-star in this ‘heartwarming family adventure series’ about an alien prince hidden in suburban America. Gossett wasn’t even the prince – he was the guy assigned to cook and do laundry for the prince, while the titular Matthew Star used his alien psychic powers to solve crimes and endlessly whine about his human girlfriend. It’s as though someone watched Mork and Mindy and said, “You know what would make this show great? If it were twice as long and not a damn bit funny!” http://en.wikipedia.org/wiki/The_Powers_of_Matthew_Starr
7) Cleopatra 2525 (2000/01) A syndicated show thought up to keep the Kiwi production team employed after “Hercules” ended, it was essentially a riff on the Gil Gerard Buck Rogers series from twenty years earlier. Only this time, instead of Buck being a wisecracking overweight astronaut, now he was a mid-20s female exotic dancer who was cryogenically frozen following a botched boob job (really!) who wakes up in the year 2525, and immediately gets involved in a war between the last remnants of humanity and the Bailey Robots that have taken over the world. Now, on the surface the idea of playing up the spandex-babe aspect of Buck Rogers, and deleting the paunchy-middle-aged male lead entirely would seem like a good idea. Alas, no, it wasn’t. This was a great show for people who watched the 1980 Buck and thought “Damn, this is too gritty and realistic! I want something faker and less compelling.” 'oh, how bad can it be?' you ask. Well check this heinous crap out: http://www.youtube.com/watch?v=rwjR7IwmOtc And that was the theme song! It goes downhill from there! http://en.wikipedia.org/wiki/Cleopatra_2525
6) Land of the Giants (1968-1970) Unquestionably the worst of Irwin Allen’s quartet of lowbrow science fiction series of the ‘60s (The others being Voyage to the Bottom of the Sea, Lost in Space, and Time Tunnel), the premise of this fundamentally misguided show was that a commercial space shuttle went off course and landed on a planet that was exactly like earth, but twelve times larger. Our not-at-all heroic cast and crew spent two seasons playing Jerry in an increasingly irritating series of Tom-and-Jerry like adventures. http://en.wikipedia.org/wiki/Land_of_the_Giants on the plus side, however, it did star Deanna Lund, who was all kinds of hot http://www.skylighters.org/larry/deannalundwp1.jpg
5) Logan’s Run (1977/78) Imagine Star Trek with
>>3) The Starlost - So bad even its creator disowned it.<<
Eh. Harlan disowns a lot of stuff. He's made fun of "The Oscar" and his story about the ants to me on at least one occasion.
>>>4) Dollhouse - Whedon obviously got ahold of the brown acid.<<<
I hated the first six episodes of it, but grew to really like it, even if the conclusion was a bit rushed.
>>>5) Star Trek: Enterprise - The less said about this, the better.<<
Never saw it. Never felt the need, though a few people occasionally made half-hearted attempts to get me to do so. I kind of drifted away from Trek in between the 1st and 2nd seasons of Voyager, I think...
I'm gonna' throw "Space Precinct" on here as an honorable mention.
The Artist Formerly Known As Republibot 3.0