Mr. Adventure wrote:
The thing is every episode of Lost in Space at that point was just as minimalist, that one just happened to be a Western. The same technique was used in the next episode to represent Hades and a couple of episodes later a mad scientist's lab.
I don't think I'd say "minimalist" in LiS's case, since that implies some deliberate aesthetic consideration. It's Irwin Allen. The word is "cheap."