This is a bit of a detour from the movies: Space 1999 was a UK-produced TV series that ran from 1975-77.
The series was created by Gerry Anderson, of Thunderbirds fame, and it used similar special effects techniques to create fantastic miniatures of moon bases and spacecraft. That is what I remember being good about it, the drama and the acting less so.
Anderson drafted in Martin Landau to star, and hopefully appeal to US audiences. The plot involved some nonsensical ruse about the moon being knocked out of its orbit and having the crew encounter various aliens on their travels through the outer reaches of space. There were I remember a ton of guest appearances (including personal favourites Christopher Lee and Peter Cushing).
I have not been tempted to revisit it since its original early evening TV screenings. This is a fold-out poster magazine, which I do not recall buying!