Sigourney Weaver has shared the original idea for Alien 3s plot, and the struggles director David Fincher faced trying to make the movie. Alien 3 is regarded by many as the black sheep of the long-running sci-fi saga, and it continues to divide opinion over 30 years after its release. For star Weaver, the negative reaction to her third outing as Ellen Ripley came down to idiotic studio interference, which she believes derailed director Finchers original vision for the threequel.