sentences:  "Blake's 7" was popular from its first broadcast, watched by approximately 10 million in the UK and shown in 25 other countries.Although many tropes of space opera are present, such as spaceships, robots, galactic empires and aliens, its budget was limited despite the need for action and special effects.Critical responses have been varied; some reviewers praised the series for its dystopian themes, strong characterisation, ambiguous morality and pessimistic tone, as well as displaying an "enormous sense of fun", but others have criticised its production values, dialogue and perceived lack of originality.