Thirty years ago, a killing machine from 2029assuming the form of an Austrian bodybuilderarrived with a lethal directive to alter the future. That he certainly did. The Terminator, made for $6.4 million by a couple of young disciples of B-movie king Roger Corman, became one of the defining sci-fi films of all time. Despite grossing $38 million, it grew into a phenomenon, spawning a five-film franchise that's taken in $1.4 billion to date and securing a place on the National Film Registry. The movie launched the career of James Cameron, who went on to direct the top two box office earners of all time, Avatar and Titanic. It also boosted Arnold Schwarzenegger, whose monotone delivery and muscle-bound swagger made a cyborg assassin the height of cool.