200 years after the events of Alien 3, military scientists on the outer space vessel USM Auriga create a clone of Ellen Ripley (Sigourney Weaver), using DNA from blood samples taken before her death. They extract the embryo of an Alien queen that had been growing inside her at the time of her death, raise it, and collect its eggs for further use. The Ripley clone is kept alive for further study. As a result of her DNA being mixed with the Alien's during the cloning process, she develops enhanced strength and reflexes, acidic blood, and an empathic link with the Aliens.A group of mercenaries arrive in their ship, the Betty, delivering several kidnapped humans in stasis. The military scientists use the kidnapped humans as hosts for the Aliens, raising several adult Aliens for study. The Betty crew soon encounter Ripley. Call (Winona Ryder) recognizes her name and tries to kill her, believing she may be used to create more Aliens. Call is too late; the Aliens have already matured and quickly escape confinement, damaging the Auriga and killing most of its crew. Military scientist Dr. Wren (J. E. Freeman) reveals that the ship's default command in an emergency is to return to Earth. Realizing this will unleash the Aliens on Earth, Ripley, the mercenaries, Wren, a marine named DiStefano (Raymond Cruz), and surviving Alien host Purvis (Leland Orser) decide to head for the Betty and use it to destroy the Auriga.As the group make their way through the damaged ship, several of them are killed by Aliens. Call is revealed to be an android after Wren betrays the group. Using her ability to interface with the Auriga's systems, she sets it on a collision course with Earth, hoping to destroy the Aliens in the crash. Wren takes Call hostage, demanding she abort the collision. Purvis holds Wren's head to his chest just as the Alien embryo he is carrying bursts through his ribcage, causing it to go through Wren's head and kill him.Screenshoots :
