first broadcast in the United Kingdom between January 1978 and December 1981 by BBC1. They are set in the third century of the second calendar (this is mentioned in associated publicity material, not in the series and at least 700 years in the future.

Blake's 7s narrative concerns the exploits of political dissident Roj Blake, who leads a small group of rebels against the forces of the totalitarian Terran Federation that rules the Earth and many colonised planets.