"The meaning of victory is not to merely defeat your enemy but to destroy him, to completely eradicate him from living memory, to leave no remnant of his endeavours, to crush utterly his achievement and remove from all record his every trace of existence. From that defeat no enemy can ever recover. That is the meaning of victory."
-Lord Commander Solar Macharius
"Favorite" would be hard to pin down, but the theme to the original V miniseries was very good in a simple, understated way. I remember the stuff on top of the TV console would shake and slip around a bit at the heavy base tones.
Gerry Anderson gave us quite a few themes that were just plain epic - Thunderbirds goes down in history due to that wonderful opening theme that's just so instantly recognisable: https://www.youtube.com/watch?v=huPB3T0v_uQ
Comments
https://www.youtube.com/watch?v=UVcAFtQ-bAQ
https://youtu.be/K7VmOZ4Ppj8
https://www.youtube.com/watch?v=yWCP8lcbcJg
Another one that is a bit more obscure by now though would have to be seaQuest DSV.
https://www.youtube.com/watch?v=qjnLgONyK0A
https://www.youtube.com/watch?v=zy5pKvCGY-s
https://www.youtube.com/watch?v=j-abTHU6NCU
https://www.youtube.com/watch?v=i3fFg12N-ps
-Lord Commander Solar Macharius
https://www.youtube.com/watch?v=mdmzohn44g8
https://www.youtube.com/watch?v=0Q1BuE55VRc
https://www.youtube.com/watch?v=aX01aQZF1zc
https://www.youtube.com/watch?v=v4aJsw-cAl0
https://www.youtube.com/watch?v=mhoa7oWPPhk
and then
https://www.youtube.com/watch?v=i6lFy_02bjU
https://www.youtube.com/watch?v=BFqXrwtq9T0
Big Finish UNIT theme (hoping they'll use it in the TV spinoff)
https://www.youtube.com/watch?v=oxaUpwx0EcE
Big Finish Torchwood theme (better than the TV version IMO)
https://www.youtube.com/watch?v=kHUQI2YFDsg
Personal favourite music suite from the audio adaptation of Russell T Davies' novel Damaged Goods
https://www.youtube.com/watch?v=W800tS18nB0
Here's my suggestions:
The Time Machine (2002) has a piece in the soundtrack simply called "Eloi":
https://www.youtube.com/watch?v=12sZT_f3vwI
Another favourite space show, often called Star Trek's Evil Twin, is LEXX:
https://www.youtube.com/watch?v=Vo6ebIy4COw
Gerry Anderson gave us quite a few themes that were just plain epic - Thunderbirds goes down in history due to that wonderful opening theme that's just so instantly recognisable:
https://www.youtube.com/watch?v=huPB3T0v_uQ
I also like the dark and twisted opening from Captain Scarlet:
https://www.youtube.com/watch?v=OLcivW_FRPg
"Star Fleet" is often mistaken as a Gerry Anderson show, but it's not:
https://www.youtube.com/watch?v=DH0H9R8O8vs
One of the best space TV shows ever, had an absolutely rocking soundtrack that was just way better than any cartoon show ever deserved to have:
https://www.youtube.com/watch?v=N50XnT9206w
(Seriously, this cartoon show is out there in YouTube in full for y'all to watch - it's absolutely stunning!)
Finally, although 'sci-fi' is perhaps not the most accurate description of this, MYST has an astonishing theme:
https://www.youtube.com/watch?v=hS3HVYHOSis
There's a lyric video for the opening song, "Status Report":
https://www.youtube.com/watch?v=tlqC-XpxGBE
https://www.youtube.com/watch?v=00T_ft5RCdc
https://www.youtube.com/watch?v=YpjGKeq8FPI
https://www.youtube.com/watch?v=jbo2IY8Yvik