The series, pitched to network executives as a Western in Space by creator Gene Roddenberry, followed the Starship Enterprise (an exploration spaceship in the "United Federation of Planets" fleet) through the Milky Way with Captain James Tiberius Kirk at the helm and first officer Spock at his side.
The series was canceled after 3 seasons (79 episodes) despite campaigns by fans to save the show, but found new life in syndication in the 1970s and eventually becoming a franchise with five additional television series and thirteen feature films by it's 50th anniversary in 2016 and is now considered one of the most popular and influential television series of all time.