Page "Blake's 7" Paragraph 22

Script editor Chris Boucher, whose influence on the series grew as it progressed, was inspired by Central American and South American revolutionaries, especially Zapata, in exploring Blake and his followers ' motives and the consequences of their actions.

This is most evident in the episode Star One, in which Blake must confront the reality that in achieving his aim of overthrowing the Federation, he will unleash chaos and death for many innocent citizens.

When Avon gains control of Liberator, following Blake's disappearance after the events of Star One, he uses it initially to pursue his own agenda, avenging Anna's death.

Later Avon realises that he cannot escape the Federation's reach and that he must, like Blake, resist them.

In this respect, by the end of the fourth series Avon has replaced Blake.