Star Trek collectively refers to a science-fiction franchise spanning six unique television series, 726 episodes and ten motion pictures in addition to hundreds of novels, video games, and other works of fiction all set within the same fictional universe created by Gene Roddenberry in the mid-1960s.

It depicts an optimistic, almost utopian future in which humanity has overcome sickness, racism, poverty, intolerance, and warfare on Earth, and has united with other intelligent species in the galaxy; the central characters explore the galaxy, discovering new worlds and encountering new civilizations, while helping to promote peace and understanding.