 It ran for three seasons and was generally well received.Nation followed it by creating "Blake's 7" (1978–81).Pitched by Nation as "the Dirty Dozen in space", "Blake's 7" was originally centred around righteous freedom fighter Roj Blake, his battle with a corrupt Galactic Federation and the rag-tag group of pirates, criminals and smugglers who are reluctantly forced to work with him after an escape from a prison ship.