* Strip-Runner, novelette by Pamela Sargent * The Asenion Solution, short story by Robert Silverberg * Murder in the Urth Degree, short story by Edward Wellen * Trantor Falls, short story by Harry Turtledove * Dilemma, short story by Connie Willis * Maureen Birnbaum After Dark, short story by George Alec Effinger * Balance, short story by Mike Resnick * The Present Eternal, short story by Barry N. Malzberg * PAPPI, short story by Sheila Finch * The Reunion at the Mile-High, short story by Frederik Pohl * Plato's Cave, novelette by Poul Anderson * Foundation's Conscience, short story by George Zebrowski * Carhunters of the Concrete Prairie, novella by Robert Sheckley * The Overheard Conversation, short story by Edward D. Hoch * Blot, novelette by Hal Clement * The Fourth Law of Robotics, short story by Harry Harrison * The Originist, novella by Orson Scott Card

Also contains prefaces by Ray Bradbury and Ben Bova and afterwords by Janet Asimov and Isaac Asimov