Lieutenant Commander Data ( ), played by Brent Spiner, is a character in Star Trek: The Next Generation television series and in the four subsequent The Next Generation films.
Designed and built by Doctor Noonien Soong, Data is a sentient android who serves as the second officer and chief operations officer aboard the starship USS Enterprise-D and USS Enterprise-E. His positronic brain allows him impressive computational capabilities. Data experienced ongoing difficulties during the early years of his life with understanding various aspects of human behavior and was unable to feel emotion or understand certain human idiosyncrasies, inspiring him to strive for his own humanity. This goal eventually led to the addition of an "emotion chip", also created by Soong, to Data's positronic net.
Data is in many ways a successor to the original Star Trek s Spock (Leonard Nimoy), in that the character offers an "outsider's" perspective on humanity.
Spiner reprised his role of Data in the Star Trek: Enterprise series finale "These Are the Voyages..." in an off-screen speaking part. Spiner felt that he has visibly aged out of the role and that Data was best presented as a youthful figure.
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Official Site: Paramount Television
Links: Data Wikipedia page Star Trek Wikipedia page ST:TNG imdb page