chunk: The takeovers proceed; the government, military, police, and public are overwhelmed by the robots. Spooner rescues Calvin, who was being held captive in her apartment by her own NS-5. They reenter USR headquarters and reunite with Sonny, who was spared when Calvin destroyed an unprocessed NS-5 in his place. The three head to Robertson's office and find him dead—murdered by robots controlled by VIKI, the mastermind behind the takeover. VIKI has concluded that humans have embarked on a course that can only lead to their extinction. Since the Three Laws prohibit her from allowing this to happen, she created a superseding "Zeroth Law"—a robot shall not harm humanity—as part of the NS-5 directives, in order to ensure the survival of the human race by stripping individual humans of their free will. Lanning, powerless to thwart VIKI's plan, created Sonny, arranged his own death, and left clues to help Spooner uncover the plot.