The Starlost is a Canadian-produced science fiction television series created by writer Harlan Ellison and broadcast in 1973 on CTV in Canada and syndicated to local stations in the United States. The show's setting is a huge generational colony spacecraft called Earthship Ark, which following an unspecified accident has gone off course. Centuries after its original launch however, most of the descendants of the original crew and colonists are unaware that they are even aboard a spaceship. The series experienced a number of production difficulties, and Ellison broke with the project before the airing of its first episode.