Leonard Nimoy
In 1965, he made his first appearance in the rejected Star Trek pilot "The Cage", and went on to play the character of  Spock until 1969. He followed his role of Spock by eight feature movie and guest slots in the various spin-off series. The character has had a significant cultural impact and earned Nimoy three Emmy Award nominations; TV Guide named Spock one of the 50 greatest TV characters. After the original Star Trek series, Nimoy starred in Mission: Impossible for two seasons, hosted the documentary series In Search of..., narrated Civilization IV, and made several well-received stage appearances. He also had a recurring role in the science fiction series Fringe.