Great Sleep ("Carousel") - Futuristic ritual on the sci-fi series LOGAN'S RUN/CBS/1977-78. In the year 2319, the descendants of an atomic holocaust live in a huge self-contained environment called the City of Domes. One of their traditions is called the Ceremony of the Great Sleep, in which all persons who reach the age of 30 are required to enter "The Carousel," a chamber wherein participants are slowly floated into the air and then exploded. The citizenry believe they are being reborn, but in actuality, they are being killed as a means of population control to sustain the city. Those refusing to enter The Carousel (known as "Runners") are pursued by Sandmen, the city's internal police force. The Runners search for the legendary location called "Sanctuary" whose inhabitants are free to live past the age of 30 years. The TV series was based on the theatrical film Logan's Run (1976) starring Michael York.