With any tv show or that time you just have to bear in mind that to a greater or lesser extent they are all conceived as theatre (unsurprising as almost everyone who worked in TV in those days worked in theatre more than they did in a studio). If you go to the theatre you make allowances for the limitations of the format. More than that, you enjoy the ingenuity displayed by the production designers, given the limitations. Then you enjoy the story they’re telling by engaging your imagination. It takes a little more effort than watching the immersive CGI-fest that is modern sci fi and fantasy but it’s worth it.
On that basis, you can see why Space 1999 went up against Doctor Who in the schedules in the 1970s, and lost.
