Try watching one of those episodes now (link below), vs. going on what you might remember as a kid. It was super cheesy and laughable, with the fake dinosaur wandering around, the Cha Ka monkey boy, and those goofy hissing Sleestak lizard men.
Even as a kid I used to laugh at the Sleestak because they waddled around so slowly I couldn't imagine them catching any human who could actually walk, (vs. run) and quickly outdistance them.
I thought you said “Land of the Giants” which arguably was THE worst sci-fi show ever.
And not on this list.