Few twentieth-century artists are renowned in such a variety of media as Orson Welles. Well known for his work in film and theater as director, actor, and writer, Welles's influence in the field of radio has often been overlooked for the more glamorous entertainment of his movies. The Medium and the Magician is a comprehensive review of Welles's radio career, devoted to assessing his radio artistry and influence in the field. Paul Heyer offers a new look at the infamous War of the Worlds panic broadcast and a discussion of how Welles's use of sound in radio influenced his motion pictures.