tar Trek is an American science fiction television series created by Gene Roddenberry that follows the adventures of the starship USS Enterprise and its crew.

The show is set in the Milky Way galaxy, roughly during the 2260s. The crew is headed by Captain James T. Kirk, first officer Spock, and chief medical officer Leonard McCoy. Shatner's voice-over introduction during each episode's opening credits stated the starship's purpose:

The series was produced from 1966-67 by Desilu Productions, and by Paramount Television from 1968-69. Star Trek aired on NBC from September 8, 1966 to June 3, 1969. Although this television series had the title of Star Trek, it later acquired the retronym of Star Trek: The Original Series to distinguish the show within the media franchise that it began. Star Trek's Nielsen ratings while on NBC were low, and the network canceled it after three seasons and 79 episodes. Nevertheless, the show had a major influence on popular culture and it became a cult classic in broadcast syndication during the 1970s. The show eventually spawned a franchise, consisting of five additional television series, 12 theatrical films, and numerous books, games, toys, and other products.

Overview from themoviedb.org