IO9.com there is a pretty good discussion of Krofft shows that touch the realm of Sci-Fi (and honestly, don’t they all). Here is an excerpt from the article:
Brothers Sid and Marty Krofft first came to fame with their touring puppet show “Les Poupées de Paris” in the 1970s which featured topless puppets, and puppet-on-puppet sex long before Avenue Q or Team America. They later made the move to television with the trippy H.R. Pufnstuf in 1969, which they swear was not drug influenced, nor was the Donny & Marie show, which they created as well. But here at io9, we’ll always remember their wacky-ass forays into science fiction. Find out everything you wanted to know about the Krofft scifi shows of yesteryear in today’s triviagasm.
They have an interesting take on some of the show that us loyal Krofft fans might not agree with, but it is a fun article. Also, there are fun facts sprinkled throughout the article. Go on over and check it out.