Ep 4. Horizon

Blake's 7 is a classic science fiction series that aired in the UK in the late 1970s and early 1980s. The show tells the story of a group of rebels who band together to fight against a corrupt government in a far-off future. Season 2 episode 4, titled "Horizon," is a pivotal episode in the series that introduces a major new character and sets the stage for the rest of the season.

The episode begins with the crew of the Liberator (the rebel ship that serves as the show's main setting) receiving a message from a planet called Horizon. The message is a distress call from a woman named Ro and her team of scientists, who are in danger from a hostile alien race called the Andromedans. The crew decides to investigate and heads to Horizon, with Blake (the show's protagonist) leading an away team to the planet's surface.

Once they arrive on Horizon, the crew is greeted by Ro and her team, who explain that they have been mining a valuable mineral called cygnus alpha on the planet. The Andromedans, who are also interested in the mineral, have been attacking the mining operation and killing Ro's team members one by one. Blake and his crew agree to help Ro and her team defend themselves against the Andromedans and protect the cygnus alpha from falling into hostile hands.

As the episode progresses, tensions mount between Ro and Blake's crew, as Ro's motivations for mining the cygnus alpha come into question. It is revealed that Ro is actually a member of a group called the Terra Nostra, a criminal organization that controls much of the galaxy's drug trade. Ro has been using the cygnus alpha to create a powerful new drug that the Terra Nostra plans to use to control the galaxy's population.

Blake and his crew are torn between their desire to protect the innocent miners on Horizon and their distaste for the Terra Nostra and its criminal activities. The situation on the planet becomes more dangerous as the Andromedans launch a full-scale attack, forcing Blake and his team to work with Ro and her team to survive.

In the end, the episode comes to a thrilling conclusion as the Liberator arrives to assist in the fight against the Andromedans and Blake confronts Ro about her true intentions. The episode sets the stage for the rest of the season, with the crew of the Liberator continuing their fight against the corrupt Federation and the Terra Nostra's criminal enterprises.

Overall, "Horizon" is a tense and action-packed episode that raises important questions about the ethics of rebellion and the gray areas between good and evil. It introduces a compelling new character in Ro and sets the stage for some of the show's most exciting and complex storylines. Fans of classic science fiction will find much to enjoy in this thrilling episode of Blake's 7.