"Once Upon a Planet" is the ninth episode of the first season of the American animated science fiction television series Star Trek.
It first aired in the NBC Saturday morning lineup on November 3, 1973, and was written by American television writers Chuck Menville and Len Janson.
The Federation starship Enterprise crew revisits a fondly remembered "amusement park" planet, hoping for some rest and relaxation.
After interviewing the angry computer, Kirk persuades it that its notion of servitude is simplistic by revealing that contrary to its assumption, they are not slaves of the Enterprise.
[1] In 2016, SyFy noted this episode for actress Nichelle Nichols's presentation of Uhura, as having her 8th best scene in Star Trek.