Director James Cameron. Though his career is relatively young, Cameron has established himself as one of the best directors and writers of intense dramas that jump between exhilaration and terror. His best-known work is "Aliens," the sequel to the 1979 sci-fi classic in which Lt. Ripley, played by Sigourney Weaver, stalks a vicious alien that's invaded her spacecraft and is slaughtering the crew. The film was nominated for seven Oscars and won two.