My favorite Star Trek episode of all time is when they beam down to the planet and the crew gets sprayed by that plant which turns them into these pot/dope heads "Everything is beautiful man", then Spock gets sprayed and he is tormented by his logic then he loses his logic and gets into the girl and they just waste their lives away. That was so great, just a huge dig at the hippies and liberals. Then they come out of it by getting mad, "My God, all this time we have wasted in our lives"
That is my favorite episode too. Its call "This Side of Paradise" or something like that. I always though the two best sequences in terms of acting we in that episode. Where Spock is hit with the spores and has a negative reaction at first, and Captain Kirk on the bridge alone speaking his entry in the log.
Good stuff ...