Don and his team enter the world of alternate-reality games following the death of a man who was participating in a game. The victim was an Assistant US Attorney, thus putting it within FBI jurisdiction. During the investigation, Amita's life is threatened when her hidden ability helps to find the killer. Meanwhile, Charlie makes a television appearence to promote his new book, The Attraction Equation. Charlie and Amita discuss the possibility of living together. Dr. Larry Fleinhardt returns to campus from his sabbatical following his outer space adventure.