1 Introduction - Welcome into the Interface -- 1 Avatars and Agents in Computerized Theatre -- 2 Virtual Inhabited 3D Worlds: Interactivity and Interaction Between Avatars, Autonomous Agents and Users -- 3 Three Types of Multimedia Interactions - and Beyond -- 4 Uses of Theatre as Model: Discussing Computers as Theatre - Some Additional Perspectives -- 2 Construction of Interactive Lifelike Agents and Actors -- 5 Agents: Dependent Autonomy and Transparent Automatons? -- 6 Enhancing the Usefulness of Community Chat Rooms: Application of Autonomous Agents -- 7 Agents as Actors -- 8 Games and Stories -- 9 Aspects of Interactive Autonomy and Perception -- 10 Discussion -- 3 Verbal and Non-Verbal Interaction with Virtual Worlds and Agents -- 11 Interacting with a Virtual World Through Motion Capture -- 12 Linguistic Interaction in Staging - a Language Engineering View -- 13 Exploiting Recent Research on Dialogue to Model Verbal Communication in Staging -- 4 Interactive Narratives -- 14 Narratives: Different Narratives, Different Theories for Different Media? -- 15 The Limits of Narration -- 16 Film Theory Meets 3D: a Film Theoretic Approach to the Design and Analysis of 3D Spaces -- 17 Shaping Meaning: On Action and Content in Unreal Worlds -- 18 Constructing the Concept of the "Interactive 3D Documentary" - Film, Drama, Narrative or Simulation? -- 19 Temporal Logic as a Tool for the Description of the Narrativity of Interactive Multimedia Systems -- 5 Methods for Designing Interactive Inhabited Virtual Worlds -- 20 Experimental Design of an Interactive Installation -- 21 Using Software Engineering Approaches to Model Dynamics in Interactive Software Systems -- 22 Managing Narrative Multimedia Production -- Author Index.