I've seen the pilot for LIS and as you noted, most people don't realize that Smith was a real POS in the first season. I heard once that supposedly his character was supposed to be a commie spy, remember this show was made in the 60's!

They had a much higher budget than Star Trek for some reason and it's been said that their sets were quite sturdy whereas the Star Trek sets could be knocked over if you leaned on them!

Anthony