“When taking Spock to see the spores, Leila comments, "It's not much further." having been beaten about the head severely on the difference between "further" and "farther," I believe I can say with some trembling confidence that she should say, "it's not much farther." "Further" means "to a greater extent or degree" whereas "farther" means "to a greater distance." (I know this is really picky, but hey, that's my business.)”