Blake's 7 is a British science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 television series produced by the BBC

BBC

The British Broadcasting Corporation is a British public service broadcaster. Its headquarters is at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff...

 for its BBC1

BBC One

BBC One is the flagship television channel of the British Broadcasting Corporation in the United Kingdom. It was launched on 2 November 1936 as the BBC Television Service, and was the world's first regular television service with a high level of image resolution...

 channel. The series was created by Terry Nation

Terry Nation

Terry Nation was a Welsh screenwriter and novelist.He is probably best known for creating the villainous Daleks in the long-running science fiction television series Doctor Who...

, a prolific television writer and creator of the Dalek

Dalek

The Daleks are a fictional extraterrestrial race of mutants from the British science fiction television series Doctor Who. Within the series, Daleks are cyborgs from the planet Skaro, created by the scientist Davros during the final years of a thousand-year war against the Thals...

s for the television series Doctor Who

Doctor Who

Doctor Who is a British science fiction television programme produced by the BBC. The programme depicts the adventures of a time-travelling humanoid alien known as the Doctor who explores the universe in a sentient time machine called the TARDIS that flies through time and space, whose exterior...

. Four series (or seasons) of Blake's 7 were produced and broadcast between 1978 and 1981. The series follows the exploits of a group of political renegades, led by freedom fighter Roj Blake.