Star Trek, Behind The Scenes

The core of the Star Trek franchise is six television series: The Original Series, The Animated Series, The Next Generation, Deep Space Nine, Voyager, and Enterprise. In total 726 Star Trek episodes have been produced across the 30 seasons of the TV series.
The Original Series (1966–1969)
Star Trek, also known as "TOS" or The Original Series, debuted in the United States on NBC on September 8, 1966. The show tells the tale of the crew of the starship Enterprise and its five-year mission "to boldly go where no man has gone before." The original 1966–1969 television series featured William Shatner as Captain James T. Kirk, Leonard Nimoy as Spock, DeForest Kelley as Dr. Leonard "Bones" McCoy, James Doohan as Montgomery "Scotty" Scott, Nichelle Nichols as Uhura, George Takei as Hikaru Sulu, and Walter Koenig as Pavel Chekov. During its original run, it was nominated several times for the Hugo Award for Best Dramatic Presentation and won twice: for the two-parter "The Menagerie" and the Harlan Ellison-written episode "The City on the Edge of Forever". After three seasons the show was canceled and the last original episode aired on June 3, 1969. It was, however, highly popular with science-fiction fans and engineering students, in spite of generally low Nielsen ratings although later demographic profiling techniques indicated the series was appealing to a highly lucrative audience. The series subsequently became popular in reruns and a cult following developed, complete with fan conventions. Originally presented under the title Star Trek, it has in recent years become known as Star Trek: The Original Series or as "Classic Star Trek"—retronyms that distinguish it from its sequels and the franchise as a whole.