Set in the "third century of the second calendar", Blake's 7 follows the exploits of revolutionary Roj Blake as he leads his band of rebels against the forces of the totalitarian Terran Federation which rules the Earth and many of the planets of the galaxy. The Federation controls its citizens using mass surveillance, brainwashing and pacification with drugged food, water and air. Sentenced to deportation to a penal colony on a remote planet, Blake escapes with the help of his fellow prisoners and gains control of the Liberator, an alien spacecraft far in advance of anything the Federation possesses. The craft has superior speed and weaponry and a teleport system that allows crew members to be transported to the surface of a planet without having to land the ship. Blake and his crew then attempt to disrupt and damage the Federation.Where as Blake is an idealistic freedom fighter, the others are criminals, including petty crooks, smugglers and killers. Notably, Kerr Avon is a technical genius more interested in self-preservation and seeking personal wealth than engaging in rebellion. When Blake is separated from his crew, Avon takes over, confirming the inherent duality in his personality and the loyalty he had for Blake's vision. However, Avon remains a target for Federation forces.Although many of the tropes of space opera such as spaceships, robots, galactic empires and aliens are present, the series is primarily noted for its strong character interaction, ambiguous morality and pessimistic tone.The series was originally planned to conclude at the end of its third series, but was unexpectedly and suddenly re-commissioned for a further series.Some changes to the program format were necessary, such as the introduction of a new spacecraft, Scorpio. Aware that renewal for a fifth series was unlikely, the production team devised a memorable conclusion for the series which left the fates of the main characters highly ambiguous. Because of this uncertainty, events following the final episode have been the subject of much speculation and debate among aficionados of the series.
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