In U.F.O. we had a military base on the moon in 1980, complete with Lunar Interceptor spacecraft, carrying nuclear missiles
UFO was superior to 1999 in so many ways it's a shame they cancelled it. Cmdr. Straker looked like a candy ass, but was a stone cold killer - a testament to Ed Bishop's acting, vs Martin Landau, who reeked of flop sweat in every scene as commander of Moon Base Alpha.
I'm not a nerd. I just happen to know these things.
UFO had a lot going for it in terms of Ed Bishop and the soundtrack was good. I think I have all the CDs.
1st year of 99 was fairly good despite the problems. The second season is when it suffered.
1999 rebooted sensibly could work and I found this spinoff idea that appears to be rather good.
https://www.youtube.com/watch?v=TPwuU5V8htw