Star Trek, Behind The Scenes

Rebirth
When the show was cancelled, owner Paramount Studios hoped to recoup its production losses by selling the syndication rights to the show. The series went into reruns in the fall of 1969, and by the late 1970s had been sold in over 150 domestic and 60 international markets. The show developed a cult following, and rumors of reviving the franchise began.
The first new Star Trek was Star Trek: The Animated Series. The series was produced by Filmation in association with Paramount Television and ran for two seasons on Saturday mornings from 1973 to 1974 on NBC, airing a total of twenty-two half-hour episodes. Although short lived, as is typical for animated productions in that timeslot during the period, the series garnered the franchise's only "Best Series" Emmy Award, as opposed to its later technical ones.
The popularity of the syndicated Star Trek led Paramount Pictures and Roddenberry to begin developing a new Star Trek: Phase II series in May 1975. Work on the series came to an end when the proposed Paramount Television Service folded.