In this interview, Nimoy talks about the character, Spock.
Just before we started shooting the show we had to experiment with four or five different types of ears, and we were not happy with any of them. And I felt a little nervous about it. I though it’ll be awful funny if these ears don’t look right. And I went to Gene and I asked him to give the up the idea of the pointed ears. And he said no he wouldn’t, we’re gonna keep working on this, and we’ll get it right eventually. I promise you if you do the show with the ears, at the end of 13 episodes, if you’re not happy I’ll write you a script where you get an ear job.