Within weeks of our premiere, it became obvious that Leonard [Nimoy] and the character of Spock were becoming something of a national phenomenon. ... And to be unflatteringly frank, it bugged me. ... [Then, Gene Roddenberry] said to me the wisest thing he could possibly have uttered. He said, `Don't ever fear having good and popular people around you, because they can only enhance your own performance. The more you can play to these people, the better the show.'