You guys are all way too young. How about going back to the 50's for "Destination Moon". Great story about how a group of enterprising astronauts commandeered the rocket after the project was cancelled and headed to the moon.
They managed to escape Earth's gravity, land on the moon and take off again all in a single stage rocket ship. Although, as I recall, the movie ended before they explained how they were going to solve the re-entry problem.
Today's space engineers worry far too much about the laws of physics.
I loved UFO as a little kid and got to watch it again in the early days of the Sci-Fi Network (now SyFy)!
There are some fans who point out that Moon Base Alpha in Space: 1999 is the same as the one from UFO, meaning that the alien invasion was defeated in the 80's ...
Despite the cheesiness, I loved Spaced 1999 -- I looked forward to a new episode every week! I'm with LiketoBike -- I liked the gadgets, the vehicles, and the coolness of a self-sustaining permanent lunar base -- something that, back in the '70s, we surely thought would come to pass before mankind reached the distant future of the year 1999!
My favorite Land of the Giants is when they find this broken time machine from thousands of years in the future. They fix the time machine by replacing some vacuum tube diodes with some from their spaceship. They even call them diodes. LOL
Re "am I a hopeless case because I know which of the Thunderbirds had that capability?"
Yes, sorry, there is no hope for you. Having said that, I only recently bought the original "Supermarination" Thunderbirds on DVD from Amazoon, so there's probably no hope for me either....
Space: 1999 did have one redeeming quality...those Eagles. Someone did think about that at least a little. They were modular (you could make craft for different missions out of the engine unit, cockpit, and central section). Hmm, maybe inspiration came from Thunderbird 2, where one could change the central pod out for different mission requirements (am I a hopeless case because I know which of the Thunderbirds had that capability? :-) Also, a utility craft for lunar travel has no need of aerodynamics. They were purely functional. The whole blowing-the-moon-out-of-orbit thing was pitiful, but I liked the gadgetry, and the thought of a permanent lunar base (like we should have now, but don't).
Now I am American, and in my forties, but I always loved Dr. Who, anything with Supermarionation, and Blake's 7. I enjoyed the plots, the accents (yes, even though I'm from the South :-), but most of all...the British special effects folks really know how to BLOW THINGS UP!!! Those shows had absolutely the GREATEST explosions!
I liked all the rest of the mentioned shows, too. As a youngster, then a teen, then on into adulthood, I just learned to look beyond the shortcomings because I hungered for science and science fiction. Some of them I would not watch now. But I do love hitting some of them up on Netflix :-)