On Sept. 8, 1966, TV viewers were transfixed by the appearance on screen of a green-hued, pointy-eared alien called Spock. But beneath the makeup, actor Leonard Nimoy fretted that this would be the end of his promising career. “How can I play a character without emotion?” he asked his boss, Gene Roddenberry. “I’m going to be on one note throughout the entire series.” Nimoy thought he looked silly wearing the prosthetics that turned him into a Vulcan, at one point issuing an ultimatum: “It’s me o