What a flash back I'm old enough to have watched that show, that and lost in space...
Never seen an actual episode, but over the years, I've seen snippets, and the movie (Saturday sci-fi) seemed pretty cool!
I've never seen Time tunnel or Land of the Giants either (except snippets) but I have a general idea about them, and they all seem like great, schlocky fun!
And of course, everyone on earth has seen Lost in Space and Star Trek.