Quaint futurology from the mid-1960s, a 2pm school holiday special at National Film and Sound Archive where everyone got in for $5. They certainly overestimated the attention spans of twenty-first century children, and just how weak a plot a movie can get away with; I guess that the years immediately preceding the moon landing were a time when the theme of space flight was bankable. The all-American entanglement with the Martians is risible: the intrepid spacemen go there, blow one of them up and wonder why they get the crap shot out of them. At least the Russkies shoot first.
By far the best part is the modelling. That just might be timeless. Perhaps I'll have to trawl IMDB's Supermarionation category.