who created this series?
Gene Roddenberry.
Star Trek
Star Trek is an American media franchise originating from the 1960s science fiction television series "", created by Gene Roddenberry. That series, now often known as ""The Original Series", debuted on September 8, 1966, and aired for three seasons on NBC. It followed the voyages of the starship USS "Enterprise", a space exploration vessel built by the United Federation of Planets in the 23rd century, on a mission "to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before". In creating "Star Trek", Roddenberry was inspired by C. S. Forester's Horatio Hornblower series of novels, Jonathan Swift "Gulliver's Travels", and television westerns such as "Wagon Train". 

who was almost cast in star trek tos UNANSWERABLE the trouble with tribbles is it a film or series? It is the  fifteenth episode of the of the American science fiction television series "". fifteenth episode of which series? "Star Trek" episode
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Star Trek [SEP] Introduction
Star Trek is an American media franchise originating from the 1960s science fiction television series "", created by Gene Roddenberry. That series, now often known as ""The Original Series", debuted on September 8, 1966, and aired for three seasons on NBC. It followed the voyages of the starship USS "Enterprise", a space exploration vessel built by the United Federation of Planets in the 23rd century, on a mission "to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before". In creating "Star Trek", Roddenberry was inspired by C. S.