Battle Beyond the Stars is a 1980 American space opera film produced by Roger Corman, directed by Jimmy T. Murakami, and starring Richard Thomas, Robert Vaughn, George Peppard, John Saxon, Sybil Danning and Darlanne Fluegel. Intended as a futuristic "Magnificent Seven (itself a western version of The Seven Samurai) in outer space", the screenplay was written by John Sayles with the score by James Horner and special effects designed by filmmaker James Cameron. The film was theatrically released by Corman's New World Pictures and was a moderate box office success, despite receiving mixed reviews from critics.
Plot
The farming world Akir is threatened by the tyrannical warlord Sador, who rules the sinister Malmori Empire and, his body parts deteriorating, is capturing and appropriating them from others. Sador's huge Hammerhead mounts a "Stellar Converter", a weapon that turns planets into small stars. He demands that the peaceful Akira submit to him when he returns in "seven risings". Zed, last of the famous Akira Corsairs, is old. He suggests they hire mercenaries to protect them. Since Akir lacks valuable resources, its people can offer only food and shelter in payment. Unable to go in person, Zed offers his ship. The ship is fast and well-armed, but, despite its AI navigation/tactical computer Nell, cannot defeat Sador alone. Shad, a young man who has piloted the ship and is well known to Nell, volunteers.
Seeking weapons, Shad goes to the space station of Doctor Hephaestus, an old friend of Zed. The station is populated mostly by androids, except for two humans: Hephaestus, whose numerous life support-systems have turned him into a cyborg, and his beautiful daughter Nanelia, who looks after him and the androids. The doctor wants Shad to mate with his daughter, by force if necessary. Shad cannot bring himself to abandon his people; he persuades Nanelia to help him escape. She follows 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 encounters Cowboy, a freighter-pilot from Earth who is ambushed by Space Jackers while delivering a shipment of laser-handguns to the planet Umateal. Shad fights off the Jackers, thus saving Cowboy's life twice over; they arrive at Umateal just in time to watch Sador destroy the planet with his Stellar Converter. Lacking the fuel to carry his weapons back home, Cowboy offers them to Akir instead. Shad talks Cowboy into sharing his gunslinging experience with the Akira.
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, a wealthy assassin who cannot show himself on any civilized planet for fear of retribution. Gelt offers his services in return for being allowed to live peacefully among the Akira. Gelt's ship is highly maneuverable and well-armed. On his way back to Akir, Shad is approached by Saint-Exmin of the Valkyrie. She is a headstrong woman looking to prove herself in battle. She pilots a small, but extremely fast, ship with enhanced firepower: the Dart. Shad finds her annoying and wishes she would go away, but she tags along.
While passing through the Lambda Zone, Nanelia's ship is attacked by a light creature called a "zyme" which is killed by the powerful Gator ship of Cayman of the Lazuli. Cayman and his eclectic crew of aliens are "zymers," who hunt zyme as whalers hunt whales. After Cayman implies he could cook her down for protein or sell her, Nanelia accuses Cayman of being as heartless as Sador. Cayman reacts with rage and takes up their cause in return for the head of Sador, who destroyed Cayman's homeworld long ago. Back on Akir, Shad's sister Mol is captured by Malmori pilots Kalo and Tembo, with the intent to rape her. As Shad and Company return, their approach frightens the Malmori into attempting to escape. Mol, in retaliation, interferes with their controls, allowing Gelt the opportunity to destroy their ship, killing all three. Upon reaching the planet's surface, the heroes are greeted with caution by the natives, who are wary of violent species. When Sador returns, his Malmori forces are intercepted by Shad's hired warriors. Gelt dogfights his way to Hammerhead, which shoots him down. Cowboy and the laser-toting Akira ward off an invasion backed by a Malmori Sonic Tank. Many of Sador's troops are killed, and their Sonic Tank is destroyed; however, many Akira die as well, including Zed.