Spock
Mr. Spock, who’s first name is not pronounceable by humans, was played by the late Leonard Nimoy. Spock is second in command of the starship USS Enterprise and the head science officer onboard. He is most known for being half Vulcan, an alien race devoid of emotion, and half human. Throughout the series, Spock is portrayed as intelligent, logical, and a problem solver with a fierce loyalty to his commanding officer and his job, despite his internal biological conflict between his human and Vulcan sides.