Commander Rick looks at Medea, the most influential and innovative shared world anthology in science fiction, with creator Harlan Ellison, artist Frank Kelly Freas, and contributing authors Kate Wilhelm, Robert Silverberg, Frederik Pohl, and Jack Williamson. He then looks at Silverberg's recent shared world anthology, Murasaki, which was inspired by Ellison's Medea, with contributors David Brin, Gregory Benford and Nancy Kress.