Star Trek is an American science fiction television series. Use this tag for questions pertaining to the original series (abbreviated TOS) from the late 1960s.

Star 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. This series' original run lasted for three seasons from 1966-69 and is commonly dubbed "The Original Series" (TOS) to distinguish it from the numerous series and films that have since followed in the franchise.