Alien 3: Directed by David Fincher. With Sigourney Weaver, Charles S. Dutton, Charles Dance, Paul McGann. After her last encounter, Ellen Ripley crash-lands on Fiorina 161, a maximum security prison. When a series of strange and deadly events occur shortly after her arrival, Ripley realizes that she has brought along an unwelcome visitor.
Double-Y syndrome is made up, but it sure sounds real, and all the guys afflicted with it in this film do a fantastic job at playing characters at the very end of their ropes and ready to just jump right off. The movie has some pretty noticeable and unfortunate cgi, but the awesome designs of the prison and of the alien all make up for those shortcomings.