"Artistic media seem to be in a permanent condition of mutation and transformation. Contemporary artists often investigate the limits and possibilities of the media they use and experiment with the crossing, upgrading and mutilation of media. Others explicitly explore the unknown intermedial space between existing media, searching for the hybrid beings that occupy these in-betweens. This issue of Theater topics explores the theme of mutating and adapting media in its relation with theatre and performance"--Page 4 of cover.