"Serpent's Tooth" may have won TAS an Emmy but I still like "Infinite Vulcan" better. If I recall correctly, Mr. Koenig never had the giant clones and plant people in his original script. That was put in to make it "exploit" what animation could show that the original series couldn't. There might even be some storyboards of what the original Phylosians looked like on the TAS DVD extras. It's been a while since I last saw them but I think it was there.