Battle Beyond the Stars was directed by Jimmy T. Murakami and produced by Roger Corman. The film is based on The Magnificent Seven, the Western remake of Akira Kurosawa’s film Seven Samurai. The screenplay was written by John Sayles, the score was composed by James Horner, and the special effects were directed by James Cameron.
The film opens with the farmers of the peaceful planet Akir are threatened by the space tyrant Sador (John Saxon) and his army of mutants, the Malmori. Sador’s huge ship carries a weapon called a “Stellar Converter”, which turns planets into small stars. He threatens to use the Converter unless the planet submits to him when he returns in several days. Zed (Jeff Corey), the last Akira warrior, is old and nearly blind. He suggests they hire mercenaries to protect the planet. Lacking valuable resources, they can only offer food and shelter in payment. Unable to go himself, Zed offers his ship, which has an artificial intelligence navigation and tactical computer named Nell, for the job if they can find a pilot. The ship is fast and well-armed but cannot defeat Sador alone. Shad (Richard Thomas), a young man who has piloted the ship and is well known to Nell, volunteers for the recruiting mission.
Shad’s first stop is the Hephaestus space station, which repairs androids. Expecting to find weapons, Shad instead finds only two humans among the androids: Doctor Hephaestus (Sam Jaffe), kept on life support, and his beautiful daughter Nanelia (Darlanne Fluegel). The doctor attempts to force Shad to mate with his daughter. Shad doesn’t want to abandon his people, and escapes, with Nanelia following in her own ship. Although she has no weapons, her highly advanced computer systems might be useful. The two split up to look for more mercenaries.
Shad comes across Space Cowboy (George Peppard), a spacegoing truck driver from Earth. Shad learns that Cowboy is late delivering a shipment of laser guns to a planet which, as they watch, Sador destroys with his weapon. Lacking the fuel to carry the weapons home, Cowboy offers to deliver them to Akir. Shad talks him into teaching the Akira to use the guns. Later, Shad meets a set of five alien clones who share a group consciousness named Nestor. They admit their life is incredibly dull, since their whole race shares one mind. In order to be entertained, they have sent five members to join Shad’s cause. Nestor does not require payment, saying they are completely self-sufficient. Next, Shad recruits Gelt (Robert Vaughn), a wealthy assassin who is so well known he can’t show his face on any civilized planet. Gelt offers his services in trade for the ability to live peacefully hiding among the Akira. Gelt’s spaceship is highly manoeuvrable and well armed. On his way back to Akir, Shad is approached by Saint Exmin (Sybil Danning), of the Valkyrie warriors. She is a headstrong woman looking to prove herself in battle. She pilots a small, barely armed, but extremely fast spaceship. Shad finds her annoying and wishes she would go away, but she tags along…